/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:44:42,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:44:42,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:44:42,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:44:42,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:44:42,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:44:42,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:44:42,179 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:44:42,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:44:42,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:44:42,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:44:42,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:44:42,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:44:42,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:44:42,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:44:42,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:44:42,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:44:42,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:44:42,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:44:42,211 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:44:42,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:44:42,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:44:42,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:44:42,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:44:42,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:44:42,222 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:44:42,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:44:42,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:44:42,224 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:44:42,226 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:44:42,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:44:42,227 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:44:42,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:44:42,229 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:44:42,231 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:44:42,231 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:44:42,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:44:42,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:44:42,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:44:42,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:44:42,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:44:42,238 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 23:44:42,268 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:44:42,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:44:42,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:44:42,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:44:42,270 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:44:42,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:44:42,271 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:44:42,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:44:42,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:44:42,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:44:42,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:44:42,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:44:42,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:44:42,273 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:44:42,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:44:42,273 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:44:42,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:44:42,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:44:42,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:44:42,274 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:44:42,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:44:42,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:44:42,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:44:42,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:44:42,276 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:44:42,276 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:44:42,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:44:42,277 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:44:42,277 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:44:42,277 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:44:42,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:44:42,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:44:42,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:44:42,752 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:44:42,752 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:44:42,754 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 23:44:42,842 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d32a38cad/87c2450b1aad4ff888635f73c056da15/FLAG64e226172 [2020-10-27 23:44:43,686 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:44:43,687 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 23:44:43,704 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d32a38cad/87c2450b1aad4ff888635f73c056da15/FLAG64e226172 [2020-10-27 23:44:43,850 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d32a38cad/87c2450b1aad4ff888635f73c056da15 [2020-10-27 23:44:43,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:44:43,859 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:44:43,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:44:43,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:44:43,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:44:43,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:44:43" (1/1) ... [2020-10-27 23:44:43,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f0c1dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:43, skipping insertion in model container [2020-10-27 23:44:43,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:44:43" (1/1) ... [2020-10-27 23:44:43,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:44:43,947 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:44:44,612 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:44:44,625 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:44:44,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:44:44,807 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:44:44,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:44 WrapperNode [2020-10-27 23:44:44,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:44:44,809 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:44:44,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:44:44,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:44:44,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:44" (1/1) ... [2020-10-27 23:44:44,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:44" (1/1) ... [2020-10-27 23:44:44,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:44" (1/1) ... [2020-10-27 23:44:44,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:44" (1/1) ... [2020-10-27 23:44:44,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:44" (1/1) ... [2020-10-27 23:44:44,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:44" (1/1) ... [2020-10-27 23:44:44,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:44" (1/1) ... [2020-10-27 23:44:44,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:44:44,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:44:44,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:44:44,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:44:44,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:44" (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 23:44:45,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:44:45,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:44:45,034 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:44:45,034 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:44:45,034 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:44:45,035 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:44:45,035 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:44:45,035 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:44:45,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:44:45,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:44:45,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:44:45,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 23:44:45,036 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:44:45,036 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:44:45,036 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:44:45,036 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:44:45,037 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:44:45,037 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:44:45,037 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:44:45,037 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:44:45,037 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:44:45,037 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:44:45,038 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:44:45,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:44:45,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:44:45,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:44:45,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:44:45,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:44:45,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:44:46,528 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:44:46,529 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:44:46,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:44:46 BoogieIcfgContainer [2020-10-27 23:44:46,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:44:46,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:44:46,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:44:46,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:44:46,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:44:43" (1/3) ... [2020-10-27 23:44:46,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9cbda13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:44:46, skipping insertion in model container [2020-10-27 23:44:46,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:44:44" (2/3) ... [2020-10-27 23:44:46,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9cbda13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:44:46, skipping insertion in model container [2020-10-27 23:44:46,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:44:46" (3/3) ... [2020-10-27 23:44:46,541 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 23:44:46,554 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:44:46,559 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:44:46,573 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:44:46,604 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:44:46,605 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:44:46,605 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:44:46,605 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:44:46,605 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:44:46,606 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:44:46,606 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:44:46,606 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:44:46,632 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states. [2020-10-27 23:44:46,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 23:44:46,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:46,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:44:46,649 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:46,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:46,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1736315952, now seen corresponding path program 1 times [2020-10-27 23:44:46,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:46,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141577110] [2020-10-27 23:44:46,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:47,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:47,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:47,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:47,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:48,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:49,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:49,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:50,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:50,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:50,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:51,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:51,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:52,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:52,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 23:44:52,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:44:52,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 23:44:52,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:52,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:44:52,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:44:52,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 23:44:52,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:44:52,635 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:44:52,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:52,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:52,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:52,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:52,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:52,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 23:44:52,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:52,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:52,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:52,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:52,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:52,721 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 23:44:52,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141577110] [2020-10-27 23:44:52,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:52,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:44:52,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967687199] [2020-10-27 23:44:52,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:44:52,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:52,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:44:52,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:44:52,753 INFO L87 Difference]: Start difference. First operand 366 states. Second operand 7 states. [2020-10-27 23:44:53,339 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 23:44:56,046 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 235 [2020-10-27 23:44:56,439 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 23:44:56,923 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 23:44:57,284 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 23:44:58,146 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 23:44:58,513 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 23:44:59,002 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 234 [2020-10-27 23:44:59,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:59,045 INFO L93 Difference]: Finished difference Result 1291 states and 2179 transitions. [2020-10-27 23:44:59,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:44:59,050 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 63 [2020-10-27 23:44:59,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:59,080 INFO L225 Difference]: With dead ends: 1291 [2020-10-27 23:44:59,080 INFO L226 Difference]: Without dead ends: 1036 [2020-10-27 23:44:59,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:44:59,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2020-10-27 23:44:59,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 573. [2020-10-27 23:44:59,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 573 states. [2020-10-27 23:44:59,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 787 transitions. [2020-10-27 23:44:59,218 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 787 transitions. Word has length 63 [2020-10-27 23:44:59,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:59,219 INFO L481 AbstractCegarLoop]: Abstraction has 573 states and 787 transitions. [2020-10-27 23:44:59,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:44:59,220 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 787 transitions. [2020-10-27 23:44:59,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 23:44:59,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:59,229 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] [2020-10-27 23:44:59,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:44:59,230 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:59,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:59,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1257842098, now seen corresponding path program 1 times [2020-10-27 23:44:59,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:59,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983338443] [2020-10-27 23:44:59,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:59,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:59,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:59,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:59,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:59,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:59,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:01,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:01,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:02,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:02,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:03,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:03,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:04,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:04,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 23:45:04,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:45:04,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:45:04,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:04,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:45:04,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:45:04,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 23:45:04,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:45:04,729 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:45:04,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:04,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:04,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:04,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:04,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:04,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 23:45:04,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:04,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:04,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:04,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:04,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:04,828 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 23:45:04,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983338443] [2020-10-27 23:45:04,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:04,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:45:04,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431889422] [2020-10-27 23:45:04,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:45:04,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:04,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:45:04,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:45:04,845 INFO L87 Difference]: Start difference. First operand 573 states and 787 transitions. Second operand 6 states. [2020-10-27 23:45:05,186 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 23:45:07,296 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 23:45:07,817 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 23:45:08,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:08,976 INFO L93 Difference]: Finished difference Result 1887 states and 2726 transitions. [2020-10-27 23:45:08,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:45:08,977 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-27 23:45:08,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:08,988 INFO L225 Difference]: With dead ends: 1887 [2020-10-27 23:45:08,988 INFO L226 Difference]: Without dead ends: 1751 [2020-10-27 23:45:08,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:45:08,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2020-10-27 23:45:09,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1094. [2020-10-27 23:45:09,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1094 states. [2020-10-27 23:45:09,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1567 transitions. [2020-10-27 23:45:09,083 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1567 transitions. Word has length 64 [2020-10-27 23:45:09,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:09,083 INFO L481 AbstractCegarLoop]: Abstraction has 1094 states and 1567 transitions. [2020-10-27 23:45:09,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:45:09,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1567 transitions. [2020-10-27 23:45:09,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 23:45:09,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:09,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:45:09,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:45:09,088 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:09,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:09,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1718245022, now seen corresponding path program 1 times [2020-10-27 23:45:09,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:09,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30153988] [2020-10-27 23:45:09,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:09,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:09,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:09,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:09,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:09,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:09,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:10,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:10,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:14,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:14,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 23:45:14,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:45:14,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 23:45:14,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:14,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:45:14,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:45:14,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 23:45:14,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:14,490 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:45:14,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:14,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:14,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:14,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:14,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:14,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:45:14,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:14,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:14,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:14,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:14,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:45:14,534 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 23:45:14,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30153988] [2020-10-27 23:45:14,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:14,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:45:14,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238349296] [2020-10-27 23:45:14,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:45:14,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:14,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:45:14,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:45:14,538 INFO L87 Difference]: Start difference. First operand 1094 states and 1567 transitions. Second operand 7 states. [2020-10-27 23:45:14,915 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 23:45:17,131 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 23:45:17,556 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 235 [2020-10-27 23:45:17,947 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 23:45:18,306 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 23:45:19,443 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 23:45:19,756 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 23:45:20,231 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 234 [2020-10-27 23:45:20,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:20,260 INFO L93 Difference]: Finished difference Result 3660 states and 5400 transitions. [2020-10-27 23:45:20,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:45:20,261 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-10-27 23:45:20,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:20,277 INFO L225 Difference]: With dead ends: 3660 [2020-10-27 23:45:20,277 INFO L226 Difference]: Without dead ends: 2998 [2020-10-27 23:45:20,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:45:20,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2998 states. [2020-10-27 23:45:20,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2998 to 2099. [2020-10-27 23:45:20,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2099 states. [2020-10-27 23:45:20,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 3075 transitions. [2020-10-27 23:45:20,410 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 3075 transitions. Word has length 64 [2020-10-27 23:45:20,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:20,410 INFO L481 AbstractCegarLoop]: Abstraction has 2099 states and 3075 transitions. [2020-10-27 23:45:20,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:45:20,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 3075 transitions. [2020-10-27 23:45:20,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 23:45:20,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:20,414 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] [2020-10-27 23:45:20,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:45:20,414 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:20,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:20,415 INFO L82 PathProgramCache]: Analyzing trace with hash 354287992, now seen corresponding path program 1 times [2020-10-27 23:45:20,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:20,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003962127] [2020-10-27 23:45:20,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:20,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:20,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:20,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:20,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:20,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:20,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:20,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:22,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:22,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:22,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:22,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:23,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:23,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:23,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:25,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:25,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 23:45:25,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:45:25,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 23:45:25,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:25,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:45:25,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 23:45:25,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 23:45:25,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:25,921 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:45:25,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:25,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:25,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:25,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:25,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:25,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 23:45:25,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:25,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:25,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:25,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:25,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:25,971 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 23:45:25,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003962127] [2020-10-27 23:45:25,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:25,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:45:25,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975528839] [2020-10-27 23:45:25,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:45:25,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:25,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:45:25,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:45:25,974 INFO L87 Difference]: Start difference. First operand 2099 states and 3075 transitions. Second operand 9 states. [2020-10-27 23:45:26,334 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 23:45:27,890 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 23:45:29,158 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 23:45:29,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:29,422 INFO L93 Difference]: Finished difference Result 9166 states and 13821 transitions. [2020-10-27 23:45:29,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 23:45:29,428 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 64 [2020-10-27 23:45:29,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:29,468 INFO L225 Difference]: With dead ends: 9166 [2020-10-27 23:45:29,469 INFO L226 Difference]: Without dead ends: 7668 [2020-10-27 23:45:29,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-27 23:45:29,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7668 states. [2020-10-27 23:45:29,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7668 to 2610. [2020-10-27 23:45:29,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2610 states. [2020-10-27 23:45:29,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2610 states to 2610 states and 3826 transitions. [2020-10-27 23:45:29,701 INFO L78 Accepts]: Start accepts. Automaton has 2610 states and 3826 transitions. Word has length 64 [2020-10-27 23:45:29,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:29,702 INFO L481 AbstractCegarLoop]: Abstraction has 2610 states and 3826 transitions. [2020-10-27 23:45:29,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:45:29,702 INFO L276 IsEmpty]: Start isEmpty. Operand 2610 states and 3826 transitions. [2020-10-27 23:45:29,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 23:45:29,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:29,705 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] [2020-10-27 23:45:29,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:45:29,706 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:29,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:29,707 INFO L82 PathProgramCache]: Analyzing trace with hash -964592184, now seen corresponding path program 1 times [2020-10-27 23:45:29,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:29,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922132209] [2020-10-27 23:45:29,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:29,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:29,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:29,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:30,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:30,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:31,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:31,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:31,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:31,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:31,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:31,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:32,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:32,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:32,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:33,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:33,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:34,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:34,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 23:45:34,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:45:34,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 23:45:34,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:34,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:45:34,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 23:45:34,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 23:45:34,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:35,315 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:45:35,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:35,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:35,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:35,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:35,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:35,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:45:35,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:35,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:35,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:35,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:35,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:35,371 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 23:45:35,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922132209] [2020-10-27 23:45:35,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:35,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:45:35,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784262250] [2020-10-27 23:45:35,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:45:35,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:35,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:45:35,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:45:35,375 INFO L87 Difference]: Start difference. First operand 2610 states and 3826 transitions. Second operand 9 states. [2020-10-27 23:45:35,730 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 23:45:37,361 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 23:45:38,184 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 23:45:38,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:38,314 INFO L93 Difference]: Finished difference Result 6283 states and 9391 transitions. [2020-10-27 23:45:38,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 23:45:38,314 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 64 [2020-10-27 23:45:38,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:38,335 INFO L225 Difference]: With dead ends: 6283 [2020-10-27 23:45:38,335 INFO L226 Difference]: Without dead ends: 4716 [2020-10-27 23:45:38,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-10-27 23:45:38,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4716 states. [2020-10-27 23:45:38,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4716 to 2628. [2020-10-27 23:45:38,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2628 states. [2020-10-27 23:45:38,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 3844 transitions. [2020-10-27 23:45:38,560 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 3844 transitions. Word has length 64 [2020-10-27 23:45:38,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:38,561 INFO L481 AbstractCegarLoop]: Abstraction has 2628 states and 3844 transitions. [2020-10-27 23:45:38,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:45:38,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 3844 transitions. [2020-10-27 23:45:38,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 23:45:38,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:38,564 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] [2020-10-27 23:45:38,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:45:38,565 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:38,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:38,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1965329862, now seen corresponding path program 1 times [2020-10-27 23:45:38,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:38,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195442052] [2020-10-27 23:45:38,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:38,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:38,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:38,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:38,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:39,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:39,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:39,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:39,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:39,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:40,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:43,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:43,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:43,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:43,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 23:45:43,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:45:43,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:45:43,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:43,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:45:43,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:45:43,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 23:45:43,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:43,965 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:45:43,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:43,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:43,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:43,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:43,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:43,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 23:45:43,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:43,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:43,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:43,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:43,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:45:44,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195442052] [2020-10-27 23:45:44,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:44,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:45:44,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111523230] [2020-10-27 23:45:44,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:45:44,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:44,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:45:44,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:45:44,023 INFO L87 Difference]: Start difference. First operand 2628 states and 3844 transitions. Second operand 7 states. [2020-10-27 23:45:44,383 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 23:45:46,041 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 235 [2020-10-27 23:45:46,437 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 23:45:46,886 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 23:45:47,214 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 23:45:48,160 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 23:45:48,485 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 23:45:49,034 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 234 [2020-10-27 23:45:49,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:45:49,110 INFO L93 Difference]: Finished difference Result 7145 states and 10602 transitions. [2020-10-27 23:45:49,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:45:49,111 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-10-27 23:45:49,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:45:49,134 INFO L225 Difference]: With dead ends: 7145 [2020-10-27 23:45:49,134 INFO L226 Difference]: Without dead ends: 5348 [2020-10-27 23:45:49,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:45:49,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5348 states. [2020-10-27 23:45:49,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5348 to 2408. [2020-10-27 23:45:49,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2408 states. [2020-10-27 23:45:49,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 3513 transitions. [2020-10-27 23:45:49,347 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 3513 transitions. Word has length 64 [2020-10-27 23:45:49,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:45:49,348 INFO L481 AbstractCegarLoop]: Abstraction has 2408 states and 3513 transitions. [2020-10-27 23:45:49,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:45:49,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 3513 transitions. [2020-10-27 23:45:49,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:45:49,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:45:49,351 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] [2020-10-27 23:45:49,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:45:49,351 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:45:49,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:45:49,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1555248734, now seen corresponding path program 1 times [2020-10-27 23:45:49,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:45:49,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122402103] [2020-10-27 23:45:49,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:45:49,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:49,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:49,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:49,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:49,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:49,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:49,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:50,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:51,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:51,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:51,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:51,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:52,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:52,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:52,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:53,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:53,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:53,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:54,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:54,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:45:54,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 23:45:54,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:45:54,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:54,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:45:54,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:45:54,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 23:45:54,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:54,967 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:45:54,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:45:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:45:54,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:45:54,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:45:54,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:45:54,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:45:54,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:45:54,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:45:54,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:45:54,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:45:54,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:45:54,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:45:55,006 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 23:45:55,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122402103] [2020-10-27 23:45:55,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:45:55,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:45:55,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534638294] [2020-10-27 23:45:55,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:45:55,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:45:55,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:45:55,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:45:55,009 INFO L87 Difference]: Start difference. First operand 2408 states and 3513 transitions. Second operand 11 states. [2020-10-27 23:45:55,459 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-10-27 23:45:58,786 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 240 [2020-10-27 23:45:59,175 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 23:45:59,755 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 240 [2020-10-27 23:46:02,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:02,485 INFO L93 Difference]: Finished difference Result 16255 states and 24400 transitions. [2020-10-27 23:46:02,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 23:46:02,485 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2020-10-27 23:46:02,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:02,526 INFO L225 Difference]: With dead ends: 16255 [2020-10-27 23:46:02,526 INFO L226 Difference]: Without dead ends: 14782 [2020-10-27 23:46:02,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 23:46:02,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14782 states. [2020-10-27 23:46:02,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14782 to 3237. [2020-10-27 23:46:02,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3237 states. [2020-10-27 23:46:03,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 4753 transitions. [2020-10-27 23:46:03,004 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 4753 transitions. Word has length 65 [2020-10-27 23:46:03,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:03,004 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 4753 transitions. [2020-10-27 23:46:03,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:46:03,005 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 4753 transitions. [2020-10-27 23:46:03,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:46:03,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:03,007 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] [2020-10-27 23:46:03,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:46:03,008 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:03,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:03,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1738980884, now seen corresponding path program 1 times [2020-10-27 23:46:03,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:03,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629932354] [2020-10-27 23:46:03,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:03,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:03,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:03,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:03,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:03,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:03,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:03,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:03,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:04,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:04,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:04,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:07,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:08,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:08,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:46:08,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:46:08,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:46:08,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:08,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:46:08,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:46:08,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 23:46:08,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:08,517 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:46:08,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:08,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:08,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:08,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:08,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:08,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:46:08,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:08,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:08,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:08,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:08,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:08,556 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 23:46:08,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629932354] [2020-10-27 23:46:08,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:08,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:46:08,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260010720] [2020-10-27 23:46:08,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:46:08,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:08,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:46:08,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:46:08,558 INFO L87 Difference]: Start difference. First operand 3237 states and 4753 transitions. Second operand 10 states. [2020-10-27 23:46:08,931 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 23:46:10,738 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 23:46:11,288 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-10-27 23:46:13,180 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 23:46:14,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:14,148 INFO L93 Difference]: Finished difference Result 21049 states and 31416 transitions. [2020-10-27 23:46:14,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 23:46:14,149 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-10-27 23:46:14,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:14,193 INFO L225 Difference]: With dead ends: 21049 [2020-10-27 23:46:14,193 INFO L226 Difference]: Without dead ends: 18436 [2020-10-27 23:46:14,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2020-10-27 23:46:14,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18436 states. [2020-10-27 23:46:14,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18436 to 3253. [2020-10-27 23:46:14,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3253 states. [2020-10-27 23:46:14,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3253 states to 3253 states and 4777 transitions. [2020-10-27 23:46:14,773 INFO L78 Accepts]: Start accepts. Automaton has 3253 states and 4777 transitions. Word has length 65 [2020-10-27 23:46:14,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:14,773 INFO L481 AbstractCegarLoop]: Abstraction has 3253 states and 4777 transitions. [2020-10-27 23:46:14,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:46:14,773 INFO L276 IsEmpty]: Start isEmpty. Operand 3253 states and 4777 transitions. [2020-10-27 23:46:14,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:46:14,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:14,777 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] [2020-10-27 23:46:14,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:46:14,777 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:14,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:14,778 INFO L82 PathProgramCache]: Analyzing trace with hash 861244850, now seen corresponding path program 1 times [2020-10-27 23:46:14,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:14,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142823667] [2020-10-27 23:46:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:14,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:14,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:14,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:14,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:15,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:15,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:15,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:15,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:16,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:16,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:17,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:17,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:17,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:18,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:19,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:19,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:19,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:19,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:19,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:19,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:46:19,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 23:46:19,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-27 23:46:19,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:19,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:46:19,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 23:46:19,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 23:46:19,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:20,359 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:46:20,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:20,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:20,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:20,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:20,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:20,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-27 23:46:20,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:20,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:20,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:20,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:20,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:20,447 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 23:46:20,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142823667] [2020-10-27 23:46:20,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:20,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:46:20,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49924218] [2020-10-27 23:46:20,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:46:20,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:20,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:46:20,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:46:20,450 INFO L87 Difference]: Start difference. First operand 3253 states and 4777 transitions. Second operand 10 states. [2020-10-27 23:46:20,938 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 260 [2020-10-27 23:46:22,716 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 23:46:24,778 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 235 [2020-10-27 23:46:25,192 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 23:46:26,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:26,803 INFO L93 Difference]: Finished difference Result 18860 states and 27934 transitions. [2020-10-27 23:46:26,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 23:46:26,804 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-10-27 23:46:26,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:26,848 INFO L225 Difference]: With dead ends: 18860 [2020-10-27 23:46:26,848 INFO L226 Difference]: Without dead ends: 17229 [2020-10-27 23:46:26,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2020-10-27 23:46:26,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17229 states. [2020-10-27 23:46:27,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17229 to 3246. [2020-10-27 23:46:27,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3246 states. [2020-10-27 23:46:27,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3246 states to 3246 states and 4756 transitions. [2020-10-27 23:46:27,644 INFO L78 Accepts]: Start accepts. Automaton has 3246 states and 4756 transitions. Word has length 65 [2020-10-27 23:46:27,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:27,644 INFO L481 AbstractCegarLoop]: Abstraction has 3246 states and 4756 transitions. [2020-10-27 23:46:27,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:46:27,645 INFO L276 IsEmpty]: Start isEmpty. Operand 3246 states and 4756 transitions. [2020-10-27 23:46:27,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:46:27,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:27,650 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] [2020-10-27 23:46:27,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:46:27,650 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:27,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:27,651 INFO L82 PathProgramCache]: Analyzing trace with hash 535555539, now seen corresponding path program 1 times [2020-10-27 23:46:27,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:27,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512382454] [2020-10-27 23:46:27,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:27,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:27,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:27,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:27,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:28,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:28,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:28,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:28,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:28,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:30,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:30,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:32,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:32,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:46:32,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 23:46:32,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:46:32,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:32,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:46:32,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:46:32,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 23:46:32,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:33,058 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:46:33,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:33,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:33,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:33,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:33,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:33,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:46:33,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:33,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:33,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:33,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:33,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:46:33,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512382454] [2020-10-27 23:46:33,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:33,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:46:33,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547158572] [2020-10-27 23:46:33,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:46:33,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:33,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:46:33,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:46:33,095 INFO L87 Difference]: Start difference. First operand 3246 states and 4756 transitions. Second operand 7 states. [2020-10-27 23:46:33,498 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 23:46:35,043 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 235 [2020-10-27 23:46:35,540 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 23:46:35,928 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 23:46:36,400 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 23:46:37,955 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 23:46:38,406 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 23:46:39,264 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 234 [2020-10-27 23:46:39,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:39,426 INFO L93 Difference]: Finished difference Result 13778 states and 20685 transitions. [2020-10-27 23:46:39,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:46:39,426 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-10-27 23:46:39,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:39,449 INFO L225 Difference]: With dead ends: 13778 [2020-10-27 23:46:39,449 INFO L226 Difference]: Without dead ends: 12131 [2020-10-27 23:46:39,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:46:39,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12131 states. [2020-10-27 23:46:40,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12131 to 4227. [2020-10-27 23:46:40,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4227 states. [2020-10-27 23:46:40,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4227 states to 4227 states and 6224 transitions. [2020-10-27 23:46:40,345 INFO L78 Accepts]: Start accepts. Automaton has 4227 states and 6224 transitions. Word has length 65 [2020-10-27 23:46:40,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:40,345 INFO L481 AbstractCegarLoop]: Abstraction has 4227 states and 6224 transitions. [2020-10-27 23:46:40,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:46:40,345 INFO L276 IsEmpty]: Start isEmpty. Operand 4227 states and 6224 transitions. [2020-10-27 23:46:40,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:46:40,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:40,348 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] [2020-10-27 23:46:40,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:46:40,349 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:40,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:40,349 INFO L82 PathProgramCache]: Analyzing trace with hash -184398334, now seen corresponding path program 1 times [2020-10-27 23:46:40,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:40,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749856440] [2020-10-27 23:46:40,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:40,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:40,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:40,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:40,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:40,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:41,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:41,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:42,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:44,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:45,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:45,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:45,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:45,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:46:45,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 23:46:45,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 23:46:45,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:45,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:46:45,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 23:46:45,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 23:46:45,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:45,776 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:46:45,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:45,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:45,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:45,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:45,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:45,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:46:45,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:45,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:45,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:45,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:45,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:45,803 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 23:46:45,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749856440] [2020-10-27 23:46:45,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:45,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:46:45,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708419797] [2020-10-27 23:46:45,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:46:45,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:45,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:46:45,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:46:45,806 INFO L87 Difference]: Start difference. First operand 4227 states and 6224 transitions. Second operand 6 states. [2020-10-27 23:46:46,183 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 23:46:47,947 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 23:46:48,585 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 23:46:49,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:46:49,972 INFO L93 Difference]: Finished difference Result 8190 states and 12100 transitions. [2020-10-27 23:46:49,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:46:49,972 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-27 23:46:49,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:46:49,983 INFO L225 Difference]: With dead ends: 8190 [2020-10-27 23:46:49,983 INFO L226 Difference]: Without dead ends: 7326 [2020-10-27 23:46:49,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:46:49,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7326 states. [2020-10-27 23:46:50,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7326 to 5451. [2020-10-27 23:46:50,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5451 states. [2020-10-27 23:46:50,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5451 states to 5451 states and 8041 transitions. [2020-10-27 23:46:50,824 INFO L78 Accepts]: Start accepts. Automaton has 5451 states and 8041 transitions. Word has length 65 [2020-10-27 23:46:50,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:46:50,825 INFO L481 AbstractCegarLoop]: Abstraction has 5451 states and 8041 transitions. [2020-10-27 23:46:50,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:46:50,825 INFO L276 IsEmpty]: Start isEmpty. Operand 5451 states and 8041 transitions. [2020-10-27 23:46:50,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:46:50,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:46:50,828 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] [2020-10-27 23:46:50,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:46:50,829 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:46:50,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:46:50,829 INFO L82 PathProgramCache]: Analyzing trace with hash -2062872046, now seen corresponding path program 1 times [2020-10-27 23:46:50,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:46:50,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964003370] [2020-10-27 23:46:50,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:46:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:50,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:50,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:50,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:51,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:51,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:51,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:51,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:52,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:52,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:52,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:52,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:52,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:55,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:55,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:55,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:55,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:55,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:46:55,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:46:55,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:46:55,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:55,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:46:55,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 23:46:55,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 23:46:55,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:56,322 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:46:56,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:46:56,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:46:56,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:46:56,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:46:56,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:46:56,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:46:56,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:46:56,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:46:56,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:46:56,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:46:56,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:46:56,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:46:56,356 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 23:46:56,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964003370] [2020-10-27 23:46:56,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:46:56,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:46:56,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001446850] [2020-10-27 23:46:56,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:46:56,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:46:56,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:46:56,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:46:56,358 INFO L87 Difference]: Start difference. First operand 5451 states and 8041 transitions. Second operand 9 states. [2020-10-27 23:46:56,775 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 23:46:58,527 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 234 [2020-10-27 23:47:01,844 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 23:47:03,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:47:03,161 INFO L93 Difference]: Finished difference Result 21902 states and 32606 transitions. [2020-10-27 23:47:03,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 23:47:03,162 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-10-27 23:47:03,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:47:03,185 INFO L225 Difference]: With dead ends: 21902 [2020-10-27 23:47:03,185 INFO L226 Difference]: Without dead ends: 17492 [2020-10-27 23:47:03,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-10-27 23:47:03,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17492 states. [2020-10-27 23:47:04,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17492 to 4287. [2020-10-27 23:47:04,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4287 states. [2020-10-27 23:47:04,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4287 states to 4287 states and 6295 transitions. [2020-10-27 23:47:04,261 INFO L78 Accepts]: Start accepts. Automaton has 4287 states and 6295 transitions. Word has length 65 [2020-10-27 23:47:04,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:47:04,261 INFO L481 AbstractCegarLoop]: Abstraction has 4287 states and 6295 transitions. [2020-10-27 23:47:04,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:47:04,261 INFO L276 IsEmpty]: Start isEmpty. Operand 4287 states and 6295 transitions. [2020-10-27 23:47:04,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:47:04,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:47:04,263 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] [2020-10-27 23:47:04,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:47:04,264 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:47:04,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:47:04,264 INFO L82 PathProgramCache]: Analyzing trace with hash -68430100, now seen corresponding path program 1 times [2020-10-27 23:47:04,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:47:04,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919506914] [2020-10-27 23:47:04,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:47:04,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:04,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:04,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:04,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:04,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:04,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:04,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:05,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:06,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:06,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:06,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:06,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:07,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:07,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:08,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:09,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:09,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:47:09,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:47:09,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:47:09,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:09,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:47:09,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:47:09,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 23:47:09,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:09,677 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:47:09,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:47:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:09,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:09,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:09,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:47:09,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:47:09,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:47:09,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:09,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:47:09,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:47:09,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:47:09,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:09,706 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 23:47:09,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919506914] [2020-10-27 23:47:09,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:47:09,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:47:09,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159421091] [2020-10-27 23:47:09,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:47:09,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:47:09,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:47:09,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:47:09,708 INFO L87 Difference]: Start difference. First operand 4287 states and 6295 transitions. Second operand 6 states. [2020-10-27 23:47:10,079 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 23:47:11,889 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 23:47:12,468 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 23:47:15,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:47:15,078 INFO L93 Difference]: Finished difference Result 9826 states and 14638 transitions. [2020-10-27 23:47:15,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:47:15,079 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-27 23:47:15,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:47:15,088 INFO L225 Difference]: With dead ends: 9826 [2020-10-27 23:47:15,088 INFO L226 Difference]: Without dead ends: 8980 [2020-10-27 23:47:15,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:47:15,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8980 states. [2020-10-27 23:47:16,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8980 to 4952. [2020-10-27 23:47:16,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4952 states. [2020-10-27 23:47:16,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4952 states to 4952 states and 7289 transitions. [2020-10-27 23:47:16,234 INFO L78 Accepts]: Start accepts. Automaton has 4952 states and 7289 transitions. Word has length 65 [2020-10-27 23:47:16,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:47:16,234 INFO L481 AbstractCegarLoop]: Abstraction has 4952 states and 7289 transitions. [2020-10-27 23:47:16,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:47:16,235 INFO L276 IsEmpty]: Start isEmpty. Operand 4952 states and 7289 transitions. [2020-10-27 23:47:16,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 23:47:16,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:47:16,236 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] [2020-10-27 23:47:16,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:47:16,236 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:47:16,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:47:16,237 INFO L82 PathProgramCache]: Analyzing trace with hash -394119411, now seen corresponding path program 1 times [2020-10-27 23:47:16,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:47:16,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346822591] [2020-10-27 23:47:16,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:47:16,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:16,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:16,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:16,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:16,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:16,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:16,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:16,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:18,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:18,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:18,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:18,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:18,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:19,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:19,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:19,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:21,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:21,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:21,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 23:47:21,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:47:21,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 23:47:21,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:21,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:47:21,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:47:21,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 23:47:21,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:21,638 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:47:21,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:47:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:21,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:21,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:21,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:47:21,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:47:21,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:47:21,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:21,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:47:21,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:47:21,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:47:21,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:21,668 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 23:47:21,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346822591] [2020-10-27 23:47:21,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:47:21,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:47:21,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543242506] [2020-10-27 23:47:21,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:47:21,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:47:21,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:47:21,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:47:21,670 INFO L87 Difference]: Start difference. First operand 4952 states and 7289 transitions. Second operand 6 states. [2020-10-27 23:47:22,042 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 23:47:23,723 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 23:47:24,162 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 23:47:29,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:47:29,809 INFO L93 Difference]: Finished difference Result 27265 states and 41056 transitions. [2020-10-27 23:47:29,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 23:47:29,809 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-27 23:47:29,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:47:29,836 INFO L225 Difference]: With dead ends: 27265 [2020-10-27 23:47:29,836 INFO L226 Difference]: Without dead ends: 23654 [2020-10-27 23:47:29,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:47:29,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23654 states. [2020-10-27 23:47:33,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23654 to 15651. [2020-10-27 23:47:33,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15651 states. [2020-10-27 23:47:33,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15651 states to 15651 states and 23355 transitions. [2020-10-27 23:47:33,314 INFO L78 Accepts]: Start accepts. Automaton has 15651 states and 23355 transitions. Word has length 65 [2020-10-27 23:47:33,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:47:33,315 INFO L481 AbstractCegarLoop]: Abstraction has 15651 states and 23355 transitions. [2020-10-27 23:47:33,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:47:33,315 INFO L276 IsEmpty]: Start isEmpty. Operand 15651 states and 23355 transitions. [2020-10-27 23:47:33,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:47:33,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:47:33,318 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] [2020-10-27 23:47:33,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 23:47:33,318 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:47:33,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:47:33,319 INFO L82 PathProgramCache]: Analyzing trace with hash 259486249, now seen corresponding path program 1 times [2020-10-27 23:47:33,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:47:33,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788187356] [2020-10-27 23:47:33,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:47:33,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:33,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:33,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:33,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:33,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:33,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:33,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:33,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:34,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:34,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:34,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:35,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:35,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:35,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:35,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:36,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:36,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:37,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:38,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:38,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:38,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:47:38,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 23:47:38,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:47:38,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:38,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 23:47:38,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:47:38,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 23:47:38,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:38,840 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:47:38,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:47:38,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:38,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:38,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:38,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:47:38,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:47:38,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:47:38,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:38,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:47:38,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:47:38,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:47:38,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:38,870 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 23:47:38,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788187356] [2020-10-27 23:47:38,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:47:38,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 23:47:38,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528261918] [2020-10-27 23:47:38,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 23:47:38,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:47:38,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 23:47:38,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:47:38,872 INFO L87 Difference]: Start difference. First operand 15651 states and 23355 transitions. Second operand 12 states. [2020-10-27 23:47:39,278 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 23:47:42,234 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2020-10-27 23:47:42,788 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 23:47:49,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:47:49,616 INFO L93 Difference]: Finished difference Result 26379 states and 39283 transitions. [2020-10-27 23:47:49,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 23:47:49,616 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-10-27 23:47:49,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:47:49,647 INFO L225 Difference]: With dead ends: 26379 [2020-10-27 23:47:49,647 INFO L226 Difference]: Without dead ends: 26371 [2020-10-27 23:47:49,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 23:47:49,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26371 states. [2020-10-27 23:47:53,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26371 to 15651. [2020-10-27 23:47:53,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15651 states. [2020-10-27 23:47:53,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15651 states to 15651 states and 23354 transitions. [2020-10-27 23:47:53,099 INFO L78 Accepts]: Start accepts. Automaton has 15651 states and 23354 transitions. Word has length 66 [2020-10-27 23:47:53,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:47:53,099 INFO L481 AbstractCegarLoop]: Abstraction has 15651 states and 23354 transitions. [2020-10-27 23:47:53,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 23:47:53,099 INFO L276 IsEmpty]: Start isEmpty. Operand 15651 states and 23354 transitions. [2020-10-27 23:47:53,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:47:53,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:47:53,102 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] [2020-10-27 23:47:53,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 23:47:53,103 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:47:53,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:47:53,103 INFO L82 PathProgramCache]: Analyzing trace with hash 527389094, now seen corresponding path program 1 times [2020-10-27 23:47:53,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:47:53,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992726411] [2020-10-27 23:47:53,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:47:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:53,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:53,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:53,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:53,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:53,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:54,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:54,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:54,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:55,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:55,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:55,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:55,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:57,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:57,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:58,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:58,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:47:58,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:47:58,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 23:47:58,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:58,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:47:58,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 23:47:58,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 23:47:58,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:58,569 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:47:58,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:47:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:47:58,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:47:58,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:47:58,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:47:58,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:47:58,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:47:58,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:47:58,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:47:58,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:47:58,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:47:58,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:47:58,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:47:58,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992726411] [2020-10-27 23:47:58,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:47:58,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:47:58,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088779030] [2020-10-27 23:47:58,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:47:58,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:47:58,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:47:58,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:47:58,598 INFO L87 Difference]: Start difference. First operand 15651 states and 23354 transitions. Second operand 6 states. [2020-10-27 23:47:58,967 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 23:48:00,985 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2020-10-27 23:48:01,489 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-10-27 23:48:10,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:48:10,795 INFO L93 Difference]: Finished difference Result 39843 states and 59836 transitions. [2020-10-27 23:48:10,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:48:10,795 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-27 23:48:10,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:48:10,843 INFO L225 Difference]: With dead ends: 39843 [2020-10-27 23:48:10,843 INFO L226 Difference]: Without dead ends: 39836 [2020-10-27 23:48:10,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:48:10,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39836 states. [2020-10-27 23:48:14,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39836 to 15651. [2020-10-27 23:48:14,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15651 states. [2020-10-27 23:48:14,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15651 states to 15651 states and 23340 transitions. [2020-10-27 23:48:14,516 INFO L78 Accepts]: Start accepts. Automaton has 15651 states and 23340 transitions. Word has length 66 [2020-10-27 23:48:14,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:48:14,522 INFO L481 AbstractCegarLoop]: Abstraction has 15651 states and 23340 transitions. [2020-10-27 23:48:14,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:48:14,522 INFO L276 IsEmpty]: Start isEmpty. Operand 15651 states and 23340 transitions. [2020-10-27 23:48:14,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 23:48:14,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:48:14,529 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] [2020-10-27 23:48:14,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 23:48:14,530 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:48:14,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:48:14,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1275499946, now seen corresponding path program 1 times [2020-10-27 23:48:14,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:48:14,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346372393] [2020-10-27 23:48:14,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:48:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:14,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:14,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:14,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:14,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:15,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:15,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:15,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:16,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:19,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:19,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 23:48:19,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:48:19,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:48:19,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:19,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:48:19,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:48:19,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 23:48:19,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:19,998 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-27 23:48:19,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:48:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:48:20,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:48:20,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:48:20,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:48:20,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:48:20,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:48:20,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:48:20,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:48:20,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:48:20,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:48:20,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:48:20,039 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 23:48:20,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346372393] [2020-10-27 23:48:20,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:48:20,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:48:20,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648765419] [2020-10-27 23:48:20,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:48:20,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:48:20,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:48:20,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:48:20,042 INFO L87 Difference]: Start difference. First operand 15651 states and 23340 transitions. Second operand 10 states. [2020-10-27 23:48:20,481 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 241