/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:18:05,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:18:05,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:18:05,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:18:05,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:18:05,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:18:05,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:18:05,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:18:05,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:18:05,180 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:18:05,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:18:05,183 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:18:05,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:18:05,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:18:05,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:18:05,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:18:05,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:18:05,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:18:05,191 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:18:05,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:18:05,195 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:18:05,196 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:18:05,198 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:18:05,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:18:05,202 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:18:05,202 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:18:05,203 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:18:05,204 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:18:05,204 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:18:05,205 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:18:05,206 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:18:05,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:18:05,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:18:05,214 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:18:05,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:18:05,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:18:05,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:18:05,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:18:05,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:18:05,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:18:05,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:18:05,218 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:18:05,245 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:18:05,245 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:18:05,247 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:18:05,247 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:18:05,247 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:18:05,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:18:05,248 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:18:05,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:18:05,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:18:05,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:18:05,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:18:05,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:18:05,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:18:05,249 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:18:05,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:18:05,250 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:18:05,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:18:05,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:18:05,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:18:05,251 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:18:05,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:18:05,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:18:05,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:18:05,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:18:05,252 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:18:05,252 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:18:05,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:18:05,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:18:05,253 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:18:05,253 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:18:05,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:18:05,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:18:05,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:18:05,700 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:18:05,701 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:18:05,704 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-28 00:18:05,807 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8a5834a64/5e6bfd7d4d1d4cff8b725ed3117e25ba/FLAG8aabb601c [2020-10-28 00:18:06,910 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:18:06,911 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-28 00:18:06,957 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8a5834a64/5e6bfd7d4d1d4cff8b725ed3117e25ba/FLAG8aabb601c [2020-10-28 00:18:07,368 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8a5834a64/5e6bfd7d4d1d4cff8b725ed3117e25ba [2020-10-28 00:18:07,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:18:07,381 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:18:07,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:18:07,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:18:07,388 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:18:07,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:18:07" (1/1) ... [2020-10-28 00:18:07,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5033905d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:07, skipping insertion in model container [2020-10-28 00:18:07,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:18:07" (1/1) ... [2020-10-28 00:18:07,405 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:18:07,649 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:18:09,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:18:09,111 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:18:09,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:18:09,840 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:18:09,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:09 WrapperNode [2020-10-28 00:18:09,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:18:09,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:18:09,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:18:09,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:18:09,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:09" (1/1) ... [2020-10-28 00:18:09,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:09" (1/1) ... [2020-10-28 00:18:09,942 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:09" (1/1) ... [2020-10-28 00:18:09,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:09" (1/1) ... [2020-10-28 00:18:10,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:09" (1/1) ... [2020-10-28 00:18:10,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:09" (1/1) ... [2020-10-28 00:18:10,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:09" (1/1) ... [2020-10-28 00:18:10,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:18:10,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:18:10,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:18:10,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:18:10,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:18:10,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:18:10,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:18:10,280 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:18:10,281 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:18:10,281 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:18:10,281 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:18:10,282 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:18:10,282 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:18:10,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:18:10,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:18:10,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:18:10,284 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:18:10,284 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:18:10,284 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:18:10,284 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:18:10,285 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:18:10,285 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:18:10,285 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:18:10,286 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:18:10,286 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 00:18:10,286 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:18:10,286 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:18:10,286 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:18:10,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:18:10,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:18:10,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:18:10,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:18:10,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:18:10,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:18:16,159 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:18:16,160 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:18:16,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:18:16 BoogieIcfgContainer [2020-10-28 00:18:16,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:18:16,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:18:16,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:18:16,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:18:16,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:18:07" (1/3) ... [2020-10-28 00:18:16,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bd108a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:18:16, skipping insertion in model container [2020-10-28 00:18:16,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:18:09" (2/3) ... [2020-10-28 00:18:16,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bd108a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:18:16, skipping insertion in model container [2020-10-28 00:18:16,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:18:16" (3/3) ... [2020-10-28 00:18:16,178 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-28 00:18:16,191 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:18:16,197 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:18:16,213 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:18:16,264 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:18:16,264 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:18:16,264 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:18:16,264 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:18:16,264 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:18:16,265 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:18:16,265 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:18:16,265 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:18:16,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states. [2020-10-28 00:18:16,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 00:18:16,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:18:16,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:18:16,361 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:18:16,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:18:16,369 INFO L82 PathProgramCache]: Analyzing trace with hash 923845094, now seen corresponding path program 1 times [2020-10-28 00:18:16,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:18:16,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214519154] [2020-10-28 00:18:16,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:18:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:17,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:17,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:17,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:17,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:19,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:20,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:20,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:20,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:21,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:21,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:22,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:22,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 00:18:22,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:18:22,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5182 [2020-10-28 00:18:22,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:22,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:18:22,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 00:18:22,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 00:18:22,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:18:25,277 WARN L193 SmtUtils]: Spent 2.88 s on a formula simplification that was a NOOP. DAG size: 670 [2020-10-28 00:18:25,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:18:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:25,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:25,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:25,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:18:25,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:18:25,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-28 00:18:25,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:25,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:18:25,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:18:25,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:18:25,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:18:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:18:25,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214519154] [2020-10-28 00:18:25,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:18:25,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:18:25,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457078829] [2020-10-28 00:18:25,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:18:25,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:18:25,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:18:25,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:18:25,529 INFO L87 Difference]: Start difference. First operand 1768 states. Second operand 4 states. [2020-10-28 00:18:28,614 WARN L193 SmtUtils]: Spent 2.89 s on a formula simplification that was a NOOP. DAG size: 674 [2020-10-28 00:18:48,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:18:48,615 INFO L93 Difference]: Finished difference Result 2342 states and 4129 transitions. [2020-10-28 00:18:48,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:18:48,617 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-28 00:18:48,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:18:48,700 INFO L225 Difference]: With dead ends: 2342 [2020-10-28 00:18:48,700 INFO L226 Difference]: Without dead ends: 1984 [2020-10-28 00:18:48,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:18:48,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2020-10-28 00:18:48,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1977. [2020-10-28 00:18:48,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1977 states. [2020-10-28 00:18:48,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 2666 transitions. [2020-10-28 00:18:48,932 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 2666 transitions. Word has length 81 [2020-10-28 00:18:48,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:18:48,933 INFO L481 AbstractCegarLoop]: Abstraction has 1977 states and 2666 transitions. [2020-10-28 00:18:48,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:18:48,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 2666 transitions. [2020-10-28 00:18:48,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 00:18:48,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:18:48,944 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:18:48,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:18:48,945 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:18:48,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:18:48,947 INFO L82 PathProgramCache]: Analyzing trace with hash -86579819, now seen corresponding path program 1 times [2020-10-28 00:18:48,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:18:48,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469719405] [2020-10-28 00:18:48,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:18:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:49,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:49,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:49,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:49,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:49,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:51,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:52,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:53,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:54,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:54,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 00:18:54,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:18:54,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:18:54,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:54,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:18:54,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:18:54,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 00:18:54,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:57,164 WARN L193 SmtUtils]: Spent 2.91 s on a formula simplification that was a NOOP. DAG size: 670 [2020-10-28 00:18:57,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:18:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:18:57,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:18:57,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:18:57,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:18:57,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:18:57,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 00:18:57,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:18:57,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:18:57,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:18:57,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:18:57,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:18:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:18:57,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469719405] [2020-10-28 00:18:57,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:18:57,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:18:57,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310025346] [2020-10-28 00:18:57,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:18:57,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:18:57,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:18:57,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:18:57,283 INFO L87 Difference]: Start difference. First operand 1977 states and 2666 transitions. Second operand 6 states. [2020-10-28 00:19:15,806 WARN L193 SmtUtils]: Spent 2.95 s on a formula simplification that was a NOOP. DAG size: 672 [2020-10-28 00:19:20,899 WARN L193 SmtUtils]: Spent 2.90 s on a formula simplification that was a NOOP. DAG size: 671 [2020-10-28 00:19:21,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:19:21,057 INFO L93 Difference]: Finished difference Result 3234 states and 4611 transitions. [2020-10-28 00:19:21,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:19:21,058 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-28 00:19:21,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:19:21,075 INFO L225 Difference]: With dead ends: 3234 [2020-10-28 00:19:21,076 INFO L226 Difference]: Without dead ends: 2918 [2020-10-28 00:19:21,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:19:21,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2918 states. [2020-10-28 00:19:21,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2918 to 1980. [2020-10-28 00:19:21,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1980 states. [2020-10-28 00:19:21,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 2668 transitions. [2020-10-28 00:19:21,171 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 2668 transitions. Word has length 81 [2020-10-28 00:19:21,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:19:21,172 INFO L481 AbstractCegarLoop]: Abstraction has 1980 states and 2668 transitions. [2020-10-28 00:19:21,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:19:21,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 2668 transitions. [2020-10-28 00:19:21,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 00:19:21,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:19:21,178 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:19:21,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:19:21,179 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:19:21,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:19:21,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1862178468, now seen corresponding path program 1 times [2020-10-28 00:19:21,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:19:21,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727693301] [2020-10-28 00:19:21,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:19:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:21,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:21,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:21,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:21,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:22,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:26,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:26,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 00:19:26,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:19:26,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 00:19:26,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:26,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:19:26,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:19:26,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 00:19:26,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:29,340 WARN L193 SmtUtils]: Spent 2.87 s on a formula simplification that was a NOOP. DAG size: 670 [2020-10-28 00:19:29,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:19:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:19:29,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:19:29,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:19:29,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:19:29,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:19:29,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 00:19:29,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:19:29,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:19:29,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:19:29,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:19:29,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:19:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:19:29,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727693301] [2020-10-28 00:19:29,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:19:29,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:19:29,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826174796] [2020-10-28 00:19:29,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:19:29,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:19:29,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:19:29,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:19:29,445 INFO L87 Difference]: Start difference. First operand 1980 states and 2668 transitions. Second operand 7 states. [2020-10-28 00:19:32,512 WARN L193 SmtUtils]: Spent 2.92 s on a formula simplification that was a NOOP. DAG size: 674 [2020-10-28 00:19:46,074 WARN L193 SmtUtils]: Spent 2.90 s on a formula simplification that was a NOOP. DAG size: 676 [2020-10-28 00:19:49,424 WARN L193 SmtUtils]: Spent 2.90 s on a formula simplification that was a NOOP. DAG size: 671 [2020-10-28 00:19:52,319 WARN L193 SmtUtils]: Spent 2.83 s on a formula simplification that was a NOOP. DAG size: 672 [2020-10-28 00:19:55,313 WARN L193 SmtUtils]: Spent 2.91 s on a formula simplification that was a NOOP. DAG size: 674 [2020-10-28 00:20:00,158 WARN L193 SmtUtils]: Spent 2.84 s on a formula simplification that was a NOOP. DAG size: 673 [2020-10-28 00:20:03,048 WARN L193 SmtUtils]: Spent 2.85 s on a formula simplification that was a NOOP. DAG size: 672 [2020-10-28 00:20:05,996 WARN L193 SmtUtils]: Spent 2.88 s on a formula simplification that was a NOOP. DAG size: 674 [2020-10-28 00:20:09,373 WARN L193 SmtUtils]: Spent 2.92 s on a formula simplification that was a NOOP. DAG size: 675 [2020-10-28 00:20:09,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:20:09,449 INFO L93 Difference]: Finished difference Result 5678 states and 8123 transitions. [2020-10-28 00:20:09,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 00:20:09,450 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 81 [2020-10-28 00:20:09,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:20:09,473 INFO L225 Difference]: With dead ends: 5678 [2020-10-28 00:20:09,474 INFO L226 Difference]: Without dead ends: 4013 [2020-10-28 00:20:09,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2020-10-28 00:20:09,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4013 states. [2020-10-28 00:20:09,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4013 to 3435. [2020-10-28 00:20:09,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3435 states. [2020-10-28 00:20:09,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 4936 transitions. [2020-10-28 00:20:09,658 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 4936 transitions. Word has length 81 [2020-10-28 00:20:09,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:20:09,659 INFO L481 AbstractCegarLoop]: Abstraction has 3435 states and 4936 transitions. [2020-10-28 00:20:09,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:20:09,659 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 4936 transitions. [2020-10-28 00:20:09,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 00:20:09,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:20:09,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:20:09,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:20:09,669 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:20:09,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:20:09,670 INFO L82 PathProgramCache]: Analyzing trace with hash -34975421, now seen corresponding path program 1 times [2020-10-28 00:20:09,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:20:09,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301615598] [2020-10-28 00:20:09,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:20:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:09,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:09,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:10,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:10,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:10,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:13,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:13,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:14,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:14,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:14,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 00:20:14,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:20:14,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 00:20:14,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:14,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:20:14,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:20:14,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 00:20:14,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:17,794 WARN L193 SmtUtils]: Spent 2.87 s on a formula simplification that was a NOOP. DAG size: 670 [2020-10-28 00:20:17,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:20:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:17,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:17,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:17,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:20:17,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:20:17,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 00:20:17,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:17,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:20:17,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:20:17,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:20:17,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:17,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:20:17,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301615598] [2020-10-28 00:20:17,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:20:17,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:20:17,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582619311] [2020-10-28 00:20:17,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:20:17,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:20:17,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:20:17,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:20:17,897 INFO L87 Difference]: Start difference. First operand 3435 states and 4936 transitions. Second operand 6 states. [2020-10-28 00:20:21,031 WARN L193 SmtUtils]: Spent 3.02 s on a formula simplification that was a NOOP. DAG size: 671 [2020-10-28 00:20:34,117 WARN L193 SmtUtils]: Spent 2.94 s on a formula simplification that was a NOOP. DAG size: 672 [2020-10-28 00:20:37,408 WARN L193 SmtUtils]: Spent 2.90 s on a formula simplification that was a NOOP. DAG size: 671 [2020-10-28 00:20:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:20:41,321 INFO L93 Difference]: Finished difference Result 9716 states and 14477 transitions. [2020-10-28 00:20:41,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:20:41,321 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-28 00:20:41,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:20:41,365 INFO L225 Difference]: With dead ends: 9716 [2020-10-28 00:20:41,365 INFO L226 Difference]: Without dead ends: 8578 [2020-10-28 00:20:41,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:20:41,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8578 states. [2020-10-28 00:20:41,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8578 to 5531. [2020-10-28 00:20:41,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5531 states. [2020-10-28 00:20:41,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5531 states to 5531 states and 8087 transitions. [2020-10-28 00:20:41,719 INFO L78 Accepts]: Start accepts. Automaton has 5531 states and 8087 transitions. Word has length 81 [2020-10-28 00:20:41,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:20:41,719 INFO L481 AbstractCegarLoop]: Abstraction has 5531 states and 8087 transitions. [2020-10-28 00:20:41,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:20:41,720 INFO L276 IsEmpty]: Start isEmpty. Operand 5531 states and 8087 transitions. [2020-10-28 00:20:41,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 00:20:41,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:20:41,727 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:20:41,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:20:41,727 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:20:41,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:20:41,728 INFO L82 PathProgramCache]: Analyzing trace with hash 709534834, now seen corresponding path program 1 times [2020-10-28 00:20:41,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:20:41,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560651006] [2020-10-28 00:20:41,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:20:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:41,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:41,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:42,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:42,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:43,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:43,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:43,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:43,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:44,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:46,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:46,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 00:20:46,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:20:46,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:20:46,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:46,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:20:46,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 00:20:46,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:20:46,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:49,884 WARN L193 SmtUtils]: Spent 2.97 s on a formula simplification that was a NOOP. DAG size: 670 [2020-10-28 00:20:49,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:20:49,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:20:49,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:20:49,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:20:49,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:20:49,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:20:49,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-28 00:20:49,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:20:49,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:20:49,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:20:49,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:20:49,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:20:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:20:49,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560651006] [2020-10-28 00:20:49,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:20:49,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:20:49,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922914661] [2020-10-28 00:20:49,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:20:49,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:20:49,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:20:49,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:20:49,995 INFO L87 Difference]: Start difference. First operand 5531 states and 8087 transitions. Second operand 4 states. [2020-10-28 00:20:53,045 WARN L193 SmtUtils]: Spent 2.95 s on a formula simplification that was a NOOP. DAG size: 674 [2020-10-28 00:21:04,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:21:04,021 INFO L93 Difference]: Finished difference Result 12292 states and 18274 transitions. [2020-10-28 00:21:04,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:21:04,022 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-28 00:21:04,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:21:04,058 INFO L225 Difference]: With dead ends: 12292 [2020-10-28 00:21:04,059 INFO L226 Difference]: Without dead ends: 8559 [2020-10-28 00:21:04,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:21:04,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8559 states. [2020-10-28 00:21:04,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8559 to 8532. [2020-10-28 00:21:04,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8532 states. [2020-10-28 00:21:04,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8532 states to 8532 states and 12526 transitions. [2020-10-28 00:21:04,518 INFO L78 Accepts]: Start accepts. Automaton has 8532 states and 12526 transitions. Word has length 81 [2020-10-28 00:21:04,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:21:04,519 INFO L481 AbstractCegarLoop]: Abstraction has 8532 states and 12526 transitions. [2020-10-28 00:21:04,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:21:04,519 INFO L276 IsEmpty]: Start isEmpty. Operand 8532 states and 12526 transitions. [2020-10-28 00:21:04,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 00:21:04,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:21:04,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:21:04,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:21:04,539 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:21:04,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:21:04,540 INFO L82 PathProgramCache]: Analyzing trace with hash 2136397165, now seen corresponding path program 1 times [2020-10-28 00:21:04,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:21:04,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542201347] [2020-10-28 00:21:04,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:21:04,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:21:04,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:04,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:04,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:05,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:06,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:09,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:21:09,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 00:21:09,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:21:09,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 00:21:09,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:21:09,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:21:09,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-28 00:21:09,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:21:09,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:21:12,590 WARN L193 SmtUtils]: Spent 2.89 s on a formula simplification that was a NOOP. DAG size: 670 [2020-10-28 00:21:12,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:21:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:21:12,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:12,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:21:12,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:21:12,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:21:12,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-28 00:21:12,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:21:12,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:21:12,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:21:12,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:21:12,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:21:12,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:21:12,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542201347] [2020-10-28 00:21:12,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:21:12,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:21:12,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103402158] [2020-10-28 00:21:12,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:21:12,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:21:12,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:21:12,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:21:12,697 INFO L87 Difference]: Start difference. First operand 8532 states and 12526 transitions. Second operand 4 states. [2020-10-28 00:21:15,899 WARN L193 SmtUtils]: Spent 3.10 s on a formula simplification that was a NOOP. DAG size: 674 [2020-10-28 00:21:28,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:21:28,017 INFO L93 Difference]: Finished difference Result 20908 states and 30771 transitions. [2020-10-28 00:21:28,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:21:28,018 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-28 00:21:28,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:21:28,057 INFO L225 Difference]: With dead ends: 20908 [2020-10-28 00:21:28,057 INFO L226 Difference]: Without dead ends: 14961 [2020-10-28 00:21:28,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:21:28,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14961 states. [2020-10-28 00:21:29,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14961 to 14954. [2020-10-28 00:21:29,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14954 states. [2020-10-28 00:21:29,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14954 states to 14954 states and 21590 transitions. [2020-10-28 00:21:29,173 INFO L78 Accepts]: Start accepts. Automaton has 14954 states and 21590 transitions. Word has length 81 [2020-10-28 00:21:29,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:21:29,173 INFO L481 AbstractCegarLoop]: Abstraction has 14954 states and 21590 transitions. [2020-10-28 00:21:29,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:21:29,173 INFO L276 IsEmpty]: Start isEmpty. Operand 14954 states and 21590 transitions. [2020-10-28 00:21:29,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 00:21:29,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:21:29,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:21:29,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:21:29,190 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:21:29,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:21:29,190 INFO L82 PathProgramCache]: Analyzing trace with hash 682984752, now seen corresponding path program 1 times [2020-10-28 00:21:29,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:21:29,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949719539] [2020-10-28 00:21:29,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:21:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:21:29,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:29,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:29,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:29,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:29,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:30,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:30,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:31,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:31,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:32,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:32,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:32,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:33,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:33,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:33,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:34,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:21:34,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 00:21:34,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 00:21:34,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-28 00:21:34,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:21:34,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 00:21:34,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:21:34,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 00:21:34,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:21:37,434 WARN L193 SmtUtils]: Spent 2.77 s on a formula simplification that was a NOOP. DAG size: 670 [2020-10-28 00:21:37,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:21:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:21:37,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:21:37,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:21:37,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:21:37,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:21:37,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 00:21:37,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:21:37,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:21:37,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:21:37,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:21:37,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:21:37,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:21:37,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949719539] [2020-10-28 00:21:37,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:21:37,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 00:21:37,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765927339] [2020-10-28 00:21:37,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 00:21:37,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:21:37,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 00:21:37,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 00:21:37,530 INFO L87 Difference]: Start difference. First operand 14954 states and 21590 transitions. Second operand 10 states. [2020-10-28 00:21:40,754 WARN L193 SmtUtils]: Spent 3.04 s on a formula simplification that was a NOOP. DAG size: 698