/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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=BIGGEST --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 -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 20:14:29,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 20:14:29,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 20:14:29,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 20:14:29,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 20:14:29,218 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 20:14:29,219 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 20:14:29,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 20:14:29,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 20:14:29,223 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 20:14:29,224 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 20:14:29,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 20:14:29,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 20:14:29,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 20:14:29,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 20:14:29,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 20:14:29,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 20:14:29,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 20:14:29,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 20:14:29,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 20:14:29,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 20:14:29,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 20:14:29,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 20:14:29,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 20:14:29,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 20:14:29,241 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 20:14:29,241 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 20:14:29,242 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 20:14:29,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 20:14:29,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 20:14:29,243 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 20:14:29,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 20:14:29,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 20:14:29,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 20:14:29,246 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 20:14:29,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 20:14:29,247 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 20:14:29,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 20:14:29,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 20:14:29,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 20:14:29,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 20:14:29,250 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 [2020-10-12 20:14:29,273 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 20:14:29,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 20:14:29,277 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 20:14:29,278 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 20:14:29,278 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 20:14:29,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 20:14:29,278 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 20:14:29,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 20:14:29,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 20:14:29,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 20:14:29,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 20:14:29,279 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 20:14:29,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 20:14:29,280 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 20:14:29,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 20:14:29,282 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 20:14:29,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 20:14:29,283 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 20:14:29,283 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 20:14:29,283 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 20:14:29,283 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 20:14:29,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 20:14:29,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 20:14:29,284 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 20:14:29,284 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 20:14:29,284 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 20:14:29,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 20:14:29,288 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 20:14:29,288 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 20:14:29,289 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 20:14:29,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 20:14:29,640 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 20:14:29,643 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 20:14:29,645 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 20:14:29,645 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 20:14:29,646 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:14:29,708 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb9406a8d/1a92d1901b0e45338ce93f0665d9898f/FLAG9c4e1d8b1 [2020-10-12 20:14:30,183 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 20:14:30,184 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:14:30,195 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb9406a8d/1a92d1901b0e45338ce93f0665d9898f/FLAG9c4e1d8b1 [2020-10-12 20:14:30,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb9406a8d/1a92d1901b0e45338ce93f0665d9898f [2020-10-12 20:14:30,580 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 20:14:30,581 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 20:14:30,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 20:14:30,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 20:14:30,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 20:14:30,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:14:30" (1/1) ... [2020-10-12 20:14:30,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e5a69aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:14:30, skipping insertion in model container [2020-10-12 20:14:30,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:14:30" (1/1) ... [2020-10-12 20:14:30,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 20:14:30,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 20:14:30,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:14:31,060 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 20:14:31,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:14:31,183 INFO L208 MainTranslator]: Completed translation [2020-10-12 20:14:31,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:14:31 WrapperNode [2020-10-12 20:14:31,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 20:14:31,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 20:14:31,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 20:14:31,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 20:14:31,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:14:31" (1/1) ... [2020-10-12 20:14:31,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:14:31" (1/1) ... [2020-10-12 20:14:31,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:14:31" (1/1) ... [2020-10-12 20:14:31,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:14:31" (1/1) ... [2020-10-12 20:14:31,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:14:31" (1/1) ... [2020-10-12 20:14:31,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:14:31" (1/1) ... [2020-10-12 20:14:31,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:14:31" (1/1) ... [2020-10-12 20:14:31,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 20:14:31,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 20:14:31,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 20:14:31,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 20:14:31,247 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:14:31" (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 [2020-10-12 20:14:31,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 20:14:31,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 20:14:31,316 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 20:14:31,316 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 20:14:31,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 20:14:31,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 20:14:31,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 20:14:31,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 20:14:31,317 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 20:14:31,317 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 20:14:31,318 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 20:14:31,318 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 20:14:31,318 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 20:14:31,318 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 20:14:31,318 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 20:14:31,319 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 20:14:31,319 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 20:14:31,319 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 20:14:31,319 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 20:14:31,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 20:14:31,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 20:14:32,079 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 20:14:32,079 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 20:14:32,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:14:32 BoogieIcfgContainer [2020-10-12 20:14:32,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 20:14:32,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 20:14:32,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 20:14:32,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 20:14:32,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 08:14:30" (1/3) ... [2020-10-12 20:14:32,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ef3ce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:14:32, skipping insertion in model container [2020-10-12 20:14:32,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:14:31" (2/3) ... [2020-10-12 20:14:32,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ef3ce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:14:32, skipping insertion in model container [2020-10-12 20:14:32,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:14:32" (3/3) ... [2020-10-12 20:14:32,093 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:14:32,104 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 20:14:32,111 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 20:14:32,126 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 20:14:32,153 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 20:14:32,153 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 20:14:32,154 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 20:14:32,154 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 20:14:32,154 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 20:14:32,154 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 20:14:32,155 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 20:14:32,155 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 20:14:32,179 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states. [2020-10-12 20:14:32,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 20:14:32,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:14:32,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:14:32,193 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:14:32,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:14:32,200 INFO L82 PathProgramCache]: Analyzing trace with hash -657204914, now seen corresponding path program 1 times [2020-10-12 20:14:32,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:14:32,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972654302] [2020-10-12 20:14:32,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:14:32,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:32,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:32,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:33,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:33,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:34,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:34,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 20:14:34,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:14:34,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2199 [2020-10-12 20:14:34,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:34,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:14:34,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 20:14:34,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 20:14:34,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 20:14:35,176 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:14:35,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:14:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:35,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:35,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:35,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:14:35,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:14:35,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 20:14:35,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:35,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:14:35,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:14:35,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:14:35,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:14:35,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:14:35,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972654302] [2020-10-12 20:14:35,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:14:35,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:14:35,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803990819] [2020-10-12 20:14:35,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:14:35,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:14:35,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:14:35,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:14:35,264 INFO L87 Difference]: Start difference. First operand 154 states. Second operand 6 states. [2020-10-12 20:14:35,664 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-12 20:14:36,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:14:36,715 INFO L93 Difference]: Finished difference Result 740 states and 1226 transitions. [2020-10-12 20:14:36,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:14:36,717 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-12 20:14:36,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:14:36,736 INFO L225 Difference]: With dead ends: 740 [2020-10-12 20:14:36,736 INFO L226 Difference]: Without dead ends: 625 [2020-10-12 20:14:36,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:14:36,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2020-10-12 20:14:36,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 243. [2020-10-12 20:14:36,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-12 20:14:36,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 386 transitions. [2020-10-12 20:14:36,813 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 386 transitions. Word has length 60 [2020-10-12 20:14:36,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:14:36,814 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 386 transitions. [2020-10-12 20:14:36,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:14:36,814 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 386 transitions. [2020-10-12 20:14:36,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 20:14:36,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:14:36,818 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:14:36,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 20:14:36,818 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:14:36,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:14:36,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1039873691, now seen corresponding path program 1 times [2020-10-12 20:14:36,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:14:36,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586697590] [2020-10-12 20:14:36,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:14:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:36,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:36,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:37,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:37,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:37,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:39,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:39,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 20:14:39,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:14:39,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2626 [2020-10-12 20:14:39,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:39,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:14:39,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-12 20:14:39,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 20:14:39,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:14:39,792 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:14:39,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:14:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:39,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:39,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:39,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:14:39,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:14:39,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 20:14:39,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:39,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:14:39,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:14:39,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:14:39,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:14:39,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:14:39,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586697590] [2020-10-12 20:14:39,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:14:39,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:14:39,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986863686] [2020-10-12 20:14:39,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:14:39,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:14:39,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:14:39,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:14:39,871 INFO L87 Difference]: Start difference. First operand 243 states and 386 transitions. Second operand 7 states. [2020-10-12 20:14:40,110 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-12 20:14:41,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:14:41,265 INFO L93 Difference]: Finished difference Result 1579 states and 2589 transitions. [2020-10-12 20:14:41,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:14:41,266 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 61 [2020-10-12 20:14:41,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:14:41,276 INFO L225 Difference]: With dead ends: 1579 [2020-10-12 20:14:41,276 INFO L226 Difference]: Without dead ends: 1391 [2020-10-12 20:14:41,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:14:41,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2020-10-12 20:14:41,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 736. [2020-10-12 20:14:41,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-10-12 20:14:41,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1199 transitions. [2020-10-12 20:14:41,369 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1199 transitions. Word has length 61 [2020-10-12 20:14:41,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:14:41,370 INFO L479 AbstractCegarLoop]: Abstraction has 736 states and 1199 transitions. [2020-10-12 20:14:41,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:14:41,370 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1199 transitions. [2020-10-12 20:14:41,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 20:14:41,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:14:41,381 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] [2020-10-12 20:14:41,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 20:14:41,382 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:14:41,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:14:41,382 INFO L82 PathProgramCache]: Analyzing trace with hash 2114260917, now seen corresponding path program 1 times [2020-10-12 20:14:41,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:14:41,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35120071] [2020-10-12 20:14:41,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:14:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:41,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:41,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:41,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:41,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:41,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:43,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:43,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 20:14:43,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:14:43,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1895 [2020-10-12 20:14:43,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:43,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:14:43,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 20:14:43,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 20:14:43,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:43,680 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:14:43,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:14:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:43,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:43,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:43,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:14:43,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:14:43,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 20:14:43,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:43,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:14:43,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:14:43,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:14:43,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:14:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:14:43,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35120071] [2020-10-12 20:14:43,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:14:43,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:14:43,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702008571] [2020-10-12 20:14:43,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:14:43,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:14:43,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:14:43,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:14:43,733 INFO L87 Difference]: Start difference. First operand 736 states and 1199 transitions. Second operand 7 states. [2020-10-12 20:14:43,968 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-12 20:14:45,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:14:45,403 INFO L93 Difference]: Finished difference Result 4584 states and 7528 transitions. [2020-10-12 20:14:45,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:14:45,404 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-10-12 20:14:45,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:14:45,432 INFO L225 Difference]: With dead ends: 4584 [2020-10-12 20:14:45,433 INFO L226 Difference]: Without dead ends: 3965 [2020-10-12 20:14:45,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:14:45,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3965 states. [2020-10-12 20:14:45,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3965 to 2142. [2020-10-12 20:14:45,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2142 states. [2020-10-12 20:14:45,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 3504 transitions. [2020-10-12 20:14:45,663 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 3504 transitions. Word has length 62 [2020-10-12 20:14:45,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:14:45,663 INFO L479 AbstractCegarLoop]: Abstraction has 2142 states and 3504 transitions. [2020-10-12 20:14:45,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:14:45,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 3504 transitions. [2020-10-12 20:14:45,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 20:14:45,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:14:45,665 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] [2020-10-12 20:14:45,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 20:14:45,666 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:14:45,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:14:45,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1065084578, now seen corresponding path program 1 times [2020-10-12 20:14:45,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:14:45,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692694773] [2020-10-12 20:14:45,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:14:45,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:45,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:45,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:45,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:45,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:46,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:47,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:47,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 20:14:47,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:14:47,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1452 [2020-10-12 20:14:47,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:47,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:14:47,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 20:14:47,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 20:14:47,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:47,360 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:14:47,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:14:47,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:47,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:47,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:47,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:14:47,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:14:47,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 20:14:47,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:47,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:14:47,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:14:47,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:14:47,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:14:47,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692694773] [2020-10-12 20:14:47,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:14:47,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:14:47,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767724321] [2020-10-12 20:14:47,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:14:47,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:14:47,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:14:47,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:14:47,402 INFO L87 Difference]: Start difference. First operand 2142 states and 3504 transitions. Second operand 7 states. [2020-10-12 20:14:47,614 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-12 20:14:49,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:14:49,294 INFO L93 Difference]: Finished difference Result 13079 states and 21427 transitions. [2020-10-12 20:14:49,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:14:49,294 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 63 [2020-10-12 20:14:49,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:14:49,354 INFO L225 Difference]: With dead ends: 13079 [2020-10-12 20:14:49,354 INFO L226 Difference]: Without dead ends: 11104 [2020-10-12 20:14:49,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:14:49,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11104 states. [2020-10-12 20:14:49,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11104 to 6013. [2020-10-12 20:14:49,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6013 states. [2020-10-12 20:14:49,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6013 states to 6013 states and 9824 transitions. [2020-10-12 20:14:49,838 INFO L78 Accepts]: Start accepts. Automaton has 6013 states and 9824 transitions. Word has length 63 [2020-10-12 20:14:49,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:14:49,839 INFO L479 AbstractCegarLoop]: Abstraction has 6013 states and 9824 transitions. [2020-10-12 20:14:49,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:14:49,839 INFO L276 IsEmpty]: Start isEmpty. Operand 6013 states and 9824 transitions. [2020-10-12 20:14:49,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 20:14:49,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:14:49,841 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] [2020-10-12 20:14:49,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 20:14:49,842 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:14:49,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:14:49,842 INFO L82 PathProgramCache]: Analyzing trace with hash -145572334, now seen corresponding path program 1 times [2020-10-12 20:14:49,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:14:49,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927090224] [2020-10-12 20:14:49,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:14:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:49,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:49,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:49,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:50,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:50,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:50,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:50,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 20:14:50,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:14:50,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1100 [2020-10-12 20:14:50,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:50,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:14:50,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 20:14:50,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 20:14:50,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:51,249 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:14:51,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:14:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:51,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:51,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:51,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:14:51,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:14:51,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 20:14:51,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:51,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:14:51,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:14:51,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:14:51,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:14:51,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927090224] [2020-10-12 20:14:51,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:14:51,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:14:51,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650922485] [2020-10-12 20:14:51,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:14:51,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:14:51,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:14:51,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:14:51,287 INFO L87 Difference]: Start difference. First operand 6013 states and 9824 transitions. Second operand 6 states. [2020-10-12 20:14:51,557 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-12 20:14:53,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:14:53,107 INFO L93 Difference]: Finished difference Result 22175 states and 36259 transitions. [2020-10-12 20:14:53,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:14:53,107 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-12 20:14:53,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:14:53,178 INFO L225 Difference]: With dead ends: 22175 [2020-10-12 20:14:53,178 INFO L226 Difference]: Without dead ends: 16330 [2020-10-12 20:14:53,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:14:53,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16330 states. [2020-10-12 20:14:53,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16330 to 6013. [2020-10-12 20:14:53,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6013 states. [2020-10-12 20:14:53,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6013 states to 6013 states and 9816 transitions. [2020-10-12 20:14:53,872 INFO L78 Accepts]: Start accepts. Automaton has 6013 states and 9816 transitions. Word has length 65 [2020-10-12 20:14:53,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:14:53,873 INFO L479 AbstractCegarLoop]: Abstraction has 6013 states and 9816 transitions. [2020-10-12 20:14:53,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:14:53,873 INFO L276 IsEmpty]: Start isEmpty. Operand 6013 states and 9816 transitions. [2020-10-12 20:14:53,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 20:14:53,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:14:53,876 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] [2020-10-12 20:14:53,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 20:14:53,876 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:14:53,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:14:53,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1442982940, now seen corresponding path program 1 times [2020-10-12 20:14:53,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:14:53,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594859660] [2020-10-12 20:14:53,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:14:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:53,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:53,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:54,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:54,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:54,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:54,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:56,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:56,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:58,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:58,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 20:14:58,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:14:58,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 20:14:58,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:58,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:14:58,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-12 20:14:58,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 20:14:58,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-12 20:14:59,175 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:14:59,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:14:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:59,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:59,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:59,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:14:59,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:14:59,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 20:14:59,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:59,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:14:59,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:14:59,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:14:59,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:14:59,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594859660] [2020-10-12 20:14:59,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:14:59,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:14:59,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270482987] [2020-10-12 20:14:59,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:14:59,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:14:59,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:14:59,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:14:59,207 INFO L87 Difference]: Start difference. First operand 6013 states and 9816 transitions. Second operand 6 states. [2020-10-12 20:14:59,407 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-12 20:15:01,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:15:01,086 INFO L93 Difference]: Finished difference Result 23685 states and 38692 transitions. [2020-10-12 20:15:01,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:15:01,086 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-12 20:15:01,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:15:01,138 INFO L225 Difference]: With dead ends: 23685 [2020-10-12 20:15:01,138 INFO L226 Difference]: Without dead ends: 17840 [2020-10-12 20:15:01,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:15:01,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17840 states. [2020-10-12 20:15:01,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17840 to 11575. [2020-10-12 20:15:01,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11575 states. [2020-10-12 20:15:01,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11575 states to 11575 states and 18862 transitions. [2020-10-12 20:15:01,989 INFO L78 Accepts]: Start accepts. Automaton has 11575 states and 18862 transitions. Word has length 66 [2020-10-12 20:15:01,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:15:01,990 INFO L479 AbstractCegarLoop]: Abstraction has 11575 states and 18862 transitions. [2020-10-12 20:15:01,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:15:01,990 INFO L276 IsEmpty]: Start isEmpty. Operand 11575 states and 18862 transitions. [2020-10-12 20:15:01,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 20:15:01,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:15:01,991 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] [2020-10-12 20:15:01,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 20:15:01,992 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:15:01,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:15:01,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1136907146, now seen corresponding path program 1 times [2020-10-12 20:15:01,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:15:01,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104686150] [2020-10-12 20:15:01,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:15:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:02,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:02,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:02,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:02,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:02,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:02,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:02,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:04,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:07,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:07,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 20:15:07,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:15:07,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 20:15:07,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:07,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:15:07,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 20:15:07,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 20:15:07,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:07,250 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:15:07,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:15:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:07,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:07,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:07,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:15:07,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:15:07,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 20:15:07,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:07,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:15:07,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:15:07,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:15:07,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:15:07,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:15:07,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104686150] [2020-10-12 20:15:07,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:15:07,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:15:07,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132163348] [2020-10-12 20:15:07,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:15:07,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:15:07,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:15:07,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:15:07,295 INFO L87 Difference]: Start difference. First operand 11575 states and 18862 transitions. Second operand 6 states. [2020-10-12 20:15:07,592 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-12 20:15:09,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:15:09,296 INFO L93 Difference]: Finished difference Result 31403 states and 51155 transitions. [2020-10-12 20:15:09,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:15:09,296 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-12 20:15:09,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:15:09,349 INFO L225 Difference]: With dead ends: 31403 [2020-10-12 20:15:09,350 INFO L226 Difference]: Without dead ends: 24760 [2020-10-12 20:15:09,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:15:09,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24760 states. [2020-10-12 20:15:11,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24760 to 18499. [2020-10-12 20:15:11,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18499 states. [2020-10-12 20:15:11,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18499 states to 18499 states and 30134 transitions. [2020-10-12 20:15:11,357 INFO L78 Accepts]: Start accepts. Automaton has 18499 states and 30134 transitions. Word has length 66 [2020-10-12 20:15:11,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:15:11,357 INFO L479 AbstractCegarLoop]: Abstraction has 18499 states and 30134 transitions. [2020-10-12 20:15:11,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:15:11,358 INFO L276 IsEmpty]: Start isEmpty. Operand 18499 states and 30134 transitions. [2020-10-12 20:15:11,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 20:15:11,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:15:11,359 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] [2020-10-12 20:15:11,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 20:15:11,360 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:15:11,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:15:11,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1459109113, now seen corresponding path program 1 times [2020-10-12 20:15:11,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:15:11,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796648918] [2020-10-12 20:15:11,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:15:11,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:11,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:11,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:11,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:11,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:11,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:11,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:11,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 20:15:11,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:15:11,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-12 20:15:11,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:11,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:15:11,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-12 20:15:11,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 20:15:11,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:11,982 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:15:11,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:15:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:11,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:11,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:11,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:15:12,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:15:12,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:15:12,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:12,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:15:12,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:15:12,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:15:12,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:15:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:15:12,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796648918] [2020-10-12 20:15:12,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:15:12,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:15:12,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984800758] [2020-10-12 20:15:12,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:15:12,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:15:12,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:15:12,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:15:12,034 INFO L87 Difference]: Start difference. First operand 18499 states and 30134 transitions. Second operand 4 states. [2020-10-12 20:15:12,231 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-12 20:15:14,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:15:14,037 INFO L93 Difference]: Finished difference Result 45434 states and 73941 transitions. [2020-10-12 20:15:14,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:15:14,038 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-12 20:15:14,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:15:14,090 INFO L225 Difference]: With dead ends: 45434 [2020-10-12 20:15:14,090 INFO L226 Difference]: Without dead ends: 27079 [2020-10-12 20:15:14,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:15:14,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27079 states. [2020-10-12 20:15:15,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27079 to 26958. [2020-10-12 20:15:15,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26958 states. [2020-10-12 20:15:15,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26958 states to 26958 states and 43669 transitions. [2020-10-12 20:15:15,635 INFO L78 Accepts]: Start accepts. Automaton has 26958 states and 43669 transitions. Word has length 66 [2020-10-12 20:15:15,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:15:15,635 INFO L479 AbstractCegarLoop]: Abstraction has 26958 states and 43669 transitions. [2020-10-12 20:15:15,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:15:15,635 INFO L276 IsEmpty]: Start isEmpty. Operand 26958 states and 43669 transitions. [2020-10-12 20:15:15,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 20:15:15,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:15:15,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:15:15,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 20:15:15,637 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:15:15,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:15:15,637 INFO L82 PathProgramCache]: Analyzing trace with hash 34781551, now seen corresponding path program 1 times [2020-10-12 20:15:15,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:15:15,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676148989] [2020-10-12 20:15:15,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:15:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:15,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:15,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:15,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:15,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:15,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:15,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:17,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:17,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:20,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:20,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 20:15:20,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:15:20,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 20:15:20,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:20,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:15:20,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-12 20:15:20,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 20:15:20,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:20,913 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:15:20,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:15:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:20,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:20,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:20,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:15:20,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:15:20,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 20:15:20,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:20,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:15:20,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:15:20,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:15:20,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:15:20,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:15:20,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676148989] [2020-10-12 20:15:20,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:15:20,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:15:20,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768338759] [2020-10-12 20:15:20,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:15:20,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:15:20,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:15:20,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:15:20,951 INFO L87 Difference]: Start difference. First operand 26958 states and 43669 transitions. Second operand 7 states. [2020-10-12 20:15:21,208 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-12 20:15:24,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:15:24,282 INFO L93 Difference]: Finished difference Result 52571 states and 85384 transitions. [2020-10-12 20:15:24,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:15:24,283 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-12 20:15:24,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:15:24,359 INFO L225 Difference]: With dead ends: 52571 [2020-10-12 20:15:24,359 INFO L226 Difference]: Without dead ends: 41312 [2020-10-12 20:15:24,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:15:24,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41312 states. [2020-10-12 20:15:26,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41312 to 33665. [2020-10-12 20:15:26,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33665 states. [2020-10-12 20:15:26,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33665 states to 33665 states and 54580 transitions. [2020-10-12 20:15:26,404 INFO L78 Accepts]: Start accepts. Automaton has 33665 states and 54580 transitions. Word has length 67 [2020-10-12 20:15:26,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:15:26,404 INFO L479 AbstractCegarLoop]: Abstraction has 33665 states and 54580 transitions. [2020-10-12 20:15:26,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:15:26,404 INFO L276 IsEmpty]: Start isEmpty. Operand 33665 states and 54580 transitions. [2020-10-12 20:15:26,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 20:15:26,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:15:26,406 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] [2020-10-12 20:15:26,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 20:15:26,406 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:15:26,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:15:26,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1021175649, now seen corresponding path program 1 times [2020-10-12 20:15:26,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:15:26,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689432758] [2020-10-12 20:15:26,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:15:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:26,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:26,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:26,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:26,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:26,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:26,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:28,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:28,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:31,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:31,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 20:15:31,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:15:31,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5510 [2020-10-12 20:15:31,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:31,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:15:31,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 20:15:31,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 20:15:31,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:32,142 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:15:32,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:15:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:32,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:32,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:32,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:15:32,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:15:32,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:15:32,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:32,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:15:32,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:15:32,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:15:32,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:32,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:15:32,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689432758] [2020-10-12 20:15:32,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:15:32,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:15:32,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550128923] [2020-10-12 20:15:32,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:15:32,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:15:32,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:15:32,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:15:32,169 INFO L87 Difference]: Start difference. First operand 33665 states and 54580 transitions. Second operand 7 states. [2020-10-12 20:15:32,390 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-12 20:15:36,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:15:36,120 INFO L93 Difference]: Finished difference Result 70307 states and 114288 transitions. [2020-10-12 20:15:36,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:15:36,121 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-12 20:15:36,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:15:36,184 INFO L225 Difference]: With dead ends: 70307 [2020-10-12 20:15:36,184 INFO L226 Difference]: Without dead ends: 54912 [2020-10-12 20:15:36,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:15:36,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54912 states. [2020-10-12 20:15:38,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54912 to 39742. [2020-10-12 20:15:38,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39742 states. [2020-10-12 20:15:38,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39742 states to 39742 states and 64452 transitions. [2020-10-12 20:15:38,602 INFO L78 Accepts]: Start accepts. Automaton has 39742 states and 64452 transitions. Word has length 68 [2020-10-12 20:15:38,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:15:38,602 INFO L479 AbstractCegarLoop]: Abstraction has 39742 states and 64452 transitions. [2020-10-12 20:15:38,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:15:38,603 INFO L276 IsEmpty]: Start isEmpty. Operand 39742 states and 64452 transitions. [2020-10-12 20:15:38,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 20:15:38,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:15:38,604 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] [2020-10-12 20:15:38,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 20:15:38,604 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:15:38,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:15:38,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1237765400, now seen corresponding path program 1 times [2020-10-12 20:15:38,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:15:38,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409992489] [2020-10-12 20:15:38,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:15:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:38,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:38,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:38,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:38,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:39,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:39,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:39,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:39,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 20:15:39,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:15:39,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 837 [2020-10-12 20:15:39,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:39,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:15:39,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:15:39,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 20:15:39,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:39,748 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:15:39,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:15:39,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:39,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:39,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:39,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:15:39,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:15:39,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:15:39,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:39,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:15:39,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:15:39,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:15:39,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:15:39,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409992489] [2020-10-12 20:15:39,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:15:39,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:15:39,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019947628] [2020-10-12 20:15:39,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:15:39,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:15:39,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:15:39,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:15:39,784 INFO L87 Difference]: Start difference. First operand 39742 states and 64452 transitions. Second operand 5 states. [2020-10-12 20:15:45,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:15:45,954 INFO L93 Difference]: Finished difference Result 116261 states and 188418 transitions. [2020-10-12 20:15:45,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:15:45,955 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-12 20:15:45,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:15:46,059 INFO L225 Difference]: With dead ends: 116261 [2020-10-12 20:15:46,059 INFO L226 Difference]: Without dead ends: 76544 [2020-10-12 20:15:46,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:15:46,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76544 states. [2020-10-12 20:15:50,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76544 to 76542. [2020-10-12 20:15:50,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76542 states. [2020-10-12 20:15:50,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76542 states to 76542 states and 123027 transitions. [2020-10-12 20:15:50,597 INFO L78 Accepts]: Start accepts. Automaton has 76542 states and 123027 transitions. Word has length 68 [2020-10-12 20:15:50,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:15:50,597 INFO L479 AbstractCegarLoop]: Abstraction has 76542 states and 123027 transitions. [2020-10-12 20:15:50,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:15:50,597 INFO L276 IsEmpty]: Start isEmpty. Operand 76542 states and 123027 transitions. [2020-10-12 20:15:50,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 20:15:50,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:15:50,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:15:50,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 20:15:50,600 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:15:50,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:15:50,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1067099993, now seen corresponding path program 1 times [2020-10-12 20:15:50,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:15:50,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071458737] [2020-10-12 20:15:50,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:15:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:50,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:50,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:50,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:50,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:50,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:50,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:51,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:51,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 20:15:51,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:15:51,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 489 [2020-10-12 20:15:51,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:51,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:15:51,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:15:51,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 20:15:51,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:51,359 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:15:51,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:15:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:51,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:51,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:51,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:15:51,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:15:51,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:15:51,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:51,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:15:51,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:15:51,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:15:51,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:15:51,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071458737] [2020-10-12 20:15:51,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:15:51,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:15:51,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313925732] [2020-10-12 20:15:51,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:15:51,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:15:51,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:15:51,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:15:51,645 INFO L87 Difference]: Start difference. First operand 76542 states and 123027 transitions. Second operand 5 states. [2020-10-12 20:16:03,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:16:03,381 INFO L93 Difference]: Finished difference Result 223662 states and 359199 transitions. [2020-10-12 20:16:03,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:16:03,382 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-12 20:16:03,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:16:03,597 INFO L225 Difference]: With dead ends: 223662 [2020-10-12 20:16:03,597 INFO L226 Difference]: Without dead ends: 147262 [2020-10-12 20:16:03,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:16:03,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147262 states. [2020-10-12 20:16:16,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147262 to 147260. [2020-10-12 20:16:16,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147260 states. [2020-10-12 20:16:16,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147260 states to 147260 states and 234479 transitions. [2020-10-12 20:16:16,739 INFO L78 Accepts]: Start accepts. Automaton has 147260 states and 234479 transitions. Word has length 69 [2020-10-12 20:16:16,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:16:16,740 INFO L479 AbstractCegarLoop]: Abstraction has 147260 states and 234479 transitions. [2020-10-12 20:16:16,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:16:16,740 INFO L276 IsEmpty]: Start isEmpty. Operand 147260 states and 234479 transitions. [2020-10-12 20:16:16,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 20:16:16,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:16:16,744 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:16:16,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 20:16:16,744 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:16:16,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:16:16,745 INFO L82 PathProgramCache]: Analyzing trace with hash -707458359, now seen corresponding path program 1 times [2020-10-12 20:16:16,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:16:16,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611123532] [2020-10-12 20:16:16,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:16:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:16,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:16,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:16,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:16,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:17,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:17,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:17,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:20,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:21,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:21,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 20:16:21,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:16:21,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 20:16:21,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:21,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:16:21,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-12 20:16:21,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 20:16:21,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:21,958 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:16:21,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:16:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:21,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:21,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:21,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:16:21,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:16:21,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 20:16:21,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:21,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:16:21,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:16:21,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:16:21,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:16:21,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611123532] [2020-10-12 20:16:21,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:16:21,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:16:21,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698201731] [2020-10-12 20:16:21,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:16:21,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:16:21,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:16:21,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:16:21,978 INFO L87 Difference]: Start difference. First operand 147260 states and 234479 transitions. Second operand 5 states. [2020-10-12 20:16:22,173 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-12 20:16:37,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:16:37,499 INFO L93 Difference]: Finished difference Result 315408 states and 502704 transitions. [2020-10-12 20:16:37,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:16:37,499 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-12 20:16:37,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:16:37,752 INFO L225 Difference]: With dead ends: 315408 [2020-10-12 20:16:37,752 INFO L226 Difference]: Without dead ends: 174016 [2020-10-12 20:16:37,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:16:37,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174016 states. [2020-10-12 20:16:54,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174016 to 163792. [2020-10-12 20:16:54,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163792 states. [2020-10-12 20:16:54,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163792 states to 163792 states and 261359 transitions. [2020-10-12 20:16:54,800 INFO L78 Accepts]: Start accepts. Automaton has 163792 states and 261359 transitions. Word has length 69 [2020-10-12 20:16:54,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:16:54,800 INFO L479 AbstractCegarLoop]: Abstraction has 163792 states and 261359 transitions. [2020-10-12 20:16:54,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:16:54,800 INFO L276 IsEmpty]: Start isEmpty. Operand 163792 states and 261359 transitions. [2020-10-12 20:16:54,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 20:16:54,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:16:54,805 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] [2020-10-12 20:16:54,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 20:16:54,805 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:16:54,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:16:54,805 INFO L82 PathProgramCache]: Analyzing trace with hash 913522665, now seen corresponding path program 1 times [2020-10-12 20:16:54,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:16:54,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562221146] [2020-10-12 20:16:54,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:16:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:54,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:54,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:54,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:54,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:55,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:55,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 20:16:55,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:16:55,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-12 20:16:55,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:55,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:16:55,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-12 20:16:55,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 20:16:55,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:55,212 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:16:55,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:16:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:55,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:55,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:55,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:16:55,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:16:55,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:16:55,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:55,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:16:55,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:16:55,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:16:55,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:55,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:16:55,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562221146] [2020-10-12 20:16:55,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:16:55,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:16:55,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600171302] [2020-10-12 20:16:55,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:16:55,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:16:55,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:16:55,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:16:55,236 INFO L87 Difference]: Start difference. First operand 163792 states and 261359 transitions. Second operand 4 states. [2020-10-12 20:16:55,438 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-12 20:17:12,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:17:12,220 INFO L93 Difference]: Finished difference Result 369526 states and 589223 transitions. [2020-10-12 20:17:12,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:17:12,221 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-12 20:17:12,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:17:12,539 INFO L225 Difference]: With dead ends: 369526 [2020-10-12 20:17:12,539 INFO L226 Difference]: Without dead ends: 205968 [2020-10-12 20:17:12,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:17:12,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205968 states. [2020-10-12 20:17:32,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205968 to 205382. [2020-10-12 20:17:32,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205382 states. [2020-10-12 20:17:32,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205382 states to 205382 states and 325805 transitions. [2020-10-12 20:17:32,795 INFO L78 Accepts]: Start accepts. Automaton has 205382 states and 325805 transitions. Word has length 70 [2020-10-12 20:17:32,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:17:32,796 INFO L479 AbstractCegarLoop]: Abstraction has 205382 states and 325805 transitions. [2020-10-12 20:17:32,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:17:32,796 INFO L276 IsEmpty]: Start isEmpty. Operand 205382 states and 325805 transitions. [2020-10-12 20:17:33,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 20:17:33,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:17:33,325 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] [2020-10-12 20:17:33,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 20:17:33,325 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:17:33,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:17:33,325 INFO L82 PathProgramCache]: Analyzing trace with hash 329873642, now seen corresponding path program 1 times [2020-10-12 20:17:33,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:17:33,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194866931] [2020-10-12 20:17:33,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:17:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:33,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:33,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:33,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:33,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:33,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:34,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:36,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:36,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 20:17:36,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:17:36,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2749 [2020-10-12 20:17:36,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:36,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:17:36,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-12 20:17:36,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 20:17:36,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:36,293 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 20:17:36,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:17:36,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:36,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:36,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:36,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:17:36,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:17:36,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 20:17:36,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:36,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:17:36,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:17:36,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:17:36,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:17:36,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194866931] [2020-10-12 20:17:36,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:17:36,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:17:36,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665306289] [2020-10-12 20:17:36,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:17:36,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:17:36,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:17:36,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:17:36,314 INFO L87 Difference]: Start difference. First operand 205382 states and 325805 transitions. Second operand 5 states. [2020-10-12 20:17:36,521 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-12 20:17:59,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:17:59,223 INFO L93 Difference]: Finished difference Result 410690 states and 651538 transitions. [2020-10-12 20:17:59,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:17:59,223 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-12 20:17:59,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:17:59,585 INFO L225 Difference]: With dead ends: 410690 [2020-10-12 20:17:59,586 INFO L226 Difference]: Without dead ends: 243472 [2020-10-12 20:17:59,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:17:59,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243472 states.