/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 --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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:34:35,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:34:35,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:34:35,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:34:35,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:34:35,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:34:35,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:34:35,254 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:34:35,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:34:35,257 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:34:35,259 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:34:35,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:34:35,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:34:35,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:34:35,269 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:34:35,270 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:34:35,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:34:35,275 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:34:35,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:34:35,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:34:35,286 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:34:35,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:34:35,288 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:34:35,289 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:34:35,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:34:35,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:34:35,295 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:34:35,298 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:34:35,298 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:34:35,300 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:34:35,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:34:35,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:34:35,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:34:35,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:34:35,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:34:35,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:34:35,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:34:35,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:34:35,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:34:35,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:34:35,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:34:35,310 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 [2020-09-21 11:34:35,355 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:34:35,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:34:35,357 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:34:35,358 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:34:35,358 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:34:35,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:34:35,359 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:34:35,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:34:35,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:34:35,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:34:35,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:34:35,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:34:35,361 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:34:35,361 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:34:35,362 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:34:35,362 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:34:35,362 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:34:35,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:34:35,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:34:35,363 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:34:35,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:34:35,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:34:35,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:34:35,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:34:35,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:34:35,364 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:34:35,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:34:35,364 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:34:35,365 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:34:35,365 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.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;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:34:35,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:34:35,833 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:34:35,840 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:34:35,844 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:34:35,844 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:34:35,846 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 11:34:35,941 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f6b505f8/0910596d92514b32a8e59241e65d67d9/FLAG1a3910a08 [2020-09-21 11:34:36,742 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:34:36,743 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 11:34:36,760 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f6b505f8/0910596d92514b32a8e59241e65d67d9/FLAG1a3910a08 [2020-09-21 11:34:36,882 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f6b505f8/0910596d92514b32a8e59241e65d67d9 [2020-09-21 11:34:36,895 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:34:36,901 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:34:36,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:34:36,903 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:34:36,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:34:36,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:34:36" (1/1) ... [2020-09-21 11:34:36,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41c7bf19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:36, skipping insertion in model container [2020-09-21 11:34:36,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:34:36" (1/1) ... [2020-09-21 11:34:36,921 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:34:37,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:34:38,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:34:38,146 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:34:38,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:34:38,692 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:34:38,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:38 WrapperNode [2020-09-21 11:34:38,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:34:38,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:34:38,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:34:38,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:34:38,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:38" (1/1) ... [2020-09-21 11:34:38,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:38" (1/1) ... [2020-09-21 11:34:38,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:38" (1/1) ... [2020-09-21 11:34:38,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:38" (1/1) ... [2020-09-21 11:34:38,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:38" (1/1) ... [2020-09-21 11:34:38,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:38" (1/1) ... [2020-09-21 11:34:38,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:38" (1/1) ... [2020-09-21 11:34:38,910 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:34:38,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:34:38,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:34:38,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:34:38,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:38" (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 [2020-09-21 11:34:39,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:34:39,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:34:39,037 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 11:34:39,038 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:34:39,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:34:39,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 11:34:39,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-21 11:34:39,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-21 11:34:39,039 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-21 11:34:39,039 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:34:39,040 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 11:34:39,040 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-21 11:34:39,040 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-21 11:34:39,040 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-21 11:34:39,041 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-21 11:34:39,041 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-21 11:34:39,041 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-21 11:34:39,041 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-21 11:34:39,042 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-21 11:34:39,042 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:34:39,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:34:39,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:34:41,852 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:34:41,853 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 11:34:41,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:34:41 BoogieIcfgContainer [2020-09-21 11:34:41,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:34:41,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:34:41,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:34:41,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:34:41,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:34:36" (1/3) ... [2020-09-21 11:34:41,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fba5774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:34:41, skipping insertion in model container [2020-09-21 11:34:41,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:34:38" (2/3) ... [2020-09-21 11:34:41,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fba5774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:34:41, skipping insertion in model container [2020-09-21 11:34:41,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:34:41" (3/3) ... [2020-09-21 11:34:41,882 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-21 11:34:41,891 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:34:41,903 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:34:41,925 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:34:41,961 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:34:41,961 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:34:41,961 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:34:41,961 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:34:41,962 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:34:41,962 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:34:41,962 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:34:41,962 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:34:42,002 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states. [2020-09-21 11:34:42,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-09-21 11:34:42,042 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:34:42,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:34:42,045 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:34:42,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:34:42,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1078138388, now seen corresponding path program 1 times [2020-09-21 11:34:42,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:34:42,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691618598] [2020-09-21 11:34:42,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:34:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:34:43,003 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:34:43,004 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:34:43,004 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:34:43,004 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:34:43,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 337 [2020-09-21 11:34:43,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:34:43,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-21 11:34:43,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:34:43,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:34:43,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-09-21 11:34:43,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-09-21 11:34:43,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:34:44,094 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 11:34:44,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:34:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:34:44,126 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:34:44,126 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:34:44,126 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:34:44,126 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:34:44,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:34:44,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:34:44,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:34:44,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:34:44,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:34:44,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:34:44,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:34:44,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:34:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:34:44,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691618598] [2020-09-21 11:34:44,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:34:44,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:34:44,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715682458] [2020-09-21 11:34:44,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:34:44,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:34:44,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:34:44,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:34:44,354 INFO L87 Difference]: Start difference. First operand 808 states. Second operand 4 states. [2020-09-21 11:34:44,867 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-21 11:34:50,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:34:50,360 INFO L93 Difference]: Finished difference Result 1527 states and 2683 transitions. [2020-09-21 11:34:50,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:34:50,362 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-09-21 11:34:50,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:34:50,402 INFO L225 Difference]: With dead ends: 1527 [2020-09-21 11:34:50,402 INFO L226 Difference]: Without dead ends: 1311 [2020-09-21 11:34:50,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:34:50,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2020-09-21 11:34:50,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1309. [2020-09-21 11:34:50,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1309 states. [2020-09-21 11:34:50,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2040 transitions. [2020-09-21 11:34:50,565 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 2040 transitions. Word has length 330 [2020-09-21 11:34:50,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:34:50,568 INFO L479 AbstractCegarLoop]: Abstraction has 1309 states and 2040 transitions. [2020-09-21 11:34:50,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:34:50,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 2040 transitions. [2020-09-21 11:34:50,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-09-21 11:34:50,578 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:34:50,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:34:50,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:34:50,579 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:34:50,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:34:50,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1867298226, now seen corresponding path program 1 times [2020-09-21 11:34:50,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:34:50,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904030101] [2020-09-21 11:34:50,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:34:50,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:34:50,851 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:34:50,851 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:34:50,852 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:34:50,852 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:34:50,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 337 [2020-09-21 11:34:50,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:34:50,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:34:50,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:34:50,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:34:50,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-09-21 11:34:50,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 225 [2020-09-21 11:34:50,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:34:51,680 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 11:34:51,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:34:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:34:51,691 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:34:51,692 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:34:51,692 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:34:51,692 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:34:51,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:34:51,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:34:51,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:34:51,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:34:51,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:34:51,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:34:51,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:34:51,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:34:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:34:51,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904030101] [2020-09-21 11:34:51,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:34:51,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:34:51,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415094176] [2020-09-21 11:34:51,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:34:51,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:34:51,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:34:51,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:34:51,843 INFO L87 Difference]: Start difference. First operand 1309 states and 2040 transitions. Second operand 4 states. [2020-09-21 11:34:52,431 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-21 11:34:57,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:34:57,114 INFO L93 Difference]: Finished difference Result 2683 states and 4213 transitions. [2020-09-21 11:34:57,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:34:57,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-09-21 11:34:57,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:34:57,131 INFO L225 Difference]: With dead ends: 2683 [2020-09-21 11:34:57,132 INFO L226 Difference]: Without dead ends: 2301 [2020-09-21 11:34:57,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:34:57,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2020-09-21 11:34:57,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2299. [2020-09-21 11:34:57,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2299 states. [2020-09-21 11:34:57,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3576 transitions. [2020-09-21 11:34:57,234 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 3576 transitions. Word has length 330 [2020-09-21 11:34:57,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:34:57,236 INFO L479 AbstractCegarLoop]: Abstraction has 2299 states and 3576 transitions. [2020-09-21 11:34:57,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:34:57,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 3576 transitions. [2020-09-21 11:34:57,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-09-21 11:34:57,245 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:34:57,245 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:34:57,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:34:57,246 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:34:57,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:34:57,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1297523319, now seen corresponding path program 1 times [2020-09-21 11:34:57,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:34:57,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360927954] [2020-09-21 11:34:57,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:34:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:34:57,548 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:34:57,548 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:34:57,548 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:34:57,552 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:34:57,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 337 [2020-09-21 11:34:57,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:34:57,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 11:34:57,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:34:57,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:34:57,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-09-21 11:34:57,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 241 [2020-09-21 11:34:57,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:34:58,487 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 11:34:58,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:34:58,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:34:58,503 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:34:58,503 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:34:58,504 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:34:58,504 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:34:58,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:34:58,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:34:58,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:34:58,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:34:58,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:34:58,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:34:58,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:34:58,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:34:58,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:34:58,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360927954] [2020-09-21 11:34:58,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:34:58,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:34:58,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392044691] [2020-09-21 11:34:58,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:34:58,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:34:58,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:34:58,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:34:58,752 INFO L87 Difference]: Start difference. First operand 2299 states and 3576 transitions. Second operand 4 states. [2020-09-21 11:34:59,270 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2020-09-21 11:35:03,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:35:03,690 INFO L93 Difference]: Finished difference Result 4867 states and 7634 transitions. [2020-09-21 11:35:03,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:35:03,691 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-09-21 11:35:03,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:35:03,714 INFO L225 Difference]: With dead ends: 4867 [2020-09-21 11:35:03,715 INFO L226 Difference]: Without dead ends: 4201 [2020-09-21 11:35:03,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:35:03,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2020-09-21 11:35:03,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 4199. [2020-09-21 11:35:03,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4199 states. [2020-09-21 11:35:03,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6516 transitions. [2020-09-21 11:35:03,878 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 6516 transitions. Word has length 330 [2020-09-21 11:35:03,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:35:03,879 INFO L479 AbstractCegarLoop]: Abstraction has 4199 states and 6516 transitions. [2020-09-21 11:35:03,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:35:03,880 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 6516 transitions. [2020-09-21 11:35:03,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-09-21 11:35:03,888 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:35:03,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:35:03,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:35:03,890 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:35:03,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:35:03,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1852614154, now seen corresponding path program 1 times [2020-09-21 11:35:03,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:35:03,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682894287] [2020-09-21 11:35:03,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:35:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:04,328 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:04,328 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:04,329 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:04,332 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:04,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 337 [2020-09-21 11:35:04,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:04,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-21 11:35:04,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:04,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:35:04,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:35:04,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-09-21 11:35:04,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:35:05,080 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 11:35:05,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:35:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:05,097 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:05,097 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:05,097 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:05,098 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:05,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:35:05,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:05,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:35:05,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:05,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:35:05,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:35:05,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:35:05,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:35:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:35:05,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682894287] [2020-09-21 11:35:05,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:35:05,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:35:05,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643745502] [2020-09-21 11:35:05,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:35:05,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:35:05,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:35:05,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:35:05,405 INFO L87 Difference]: Start difference. First operand 4199 states and 6516 transitions. Second operand 5 states. [2020-09-21 11:35:13,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:35:13,205 INFO L93 Difference]: Finished difference Result 12414 states and 19245 transitions. [2020-09-21 11:35:13,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:35:13,206 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-09-21 11:35:13,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:35:13,243 INFO L225 Difference]: With dead ends: 12414 [2020-09-21 11:35:13,243 INFO L226 Difference]: Without dead ends: 8230 [2020-09-21 11:35:13,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:35:13,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2020-09-21 11:35:13,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 8228. [2020-09-21 11:35:13,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8228 states. [2020-09-21 11:35:13,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8228 states to 8228 states and 12694 transitions. [2020-09-21 11:35:13,550 INFO L78 Accepts]: Start accepts. Automaton has 8228 states and 12694 transitions. Word has length 330 [2020-09-21 11:35:13,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:35:13,550 INFO L479 AbstractCegarLoop]: Abstraction has 8228 states and 12694 transitions. [2020-09-21 11:35:13,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:35:13,551 INFO L276 IsEmpty]: Start isEmpty. Operand 8228 states and 12694 transitions. [2020-09-21 11:35:13,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-09-21 11:35:13,565 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:35:13,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:35:13,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:35:13,566 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:35:13,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:35:13,567 INFO L82 PathProgramCache]: Analyzing trace with hash 569689837, now seen corresponding path program 1 times [2020-09-21 11:35:13,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:35:13,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39838235] [2020-09-21 11:35:13,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:35:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:13,732 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:13,732 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:13,732 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:13,733 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:13,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-09-21 11:35:13,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:13,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:35:13,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:13,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:35:13,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:35:13,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-09-21 11:35:13,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:35:14,484 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 11:35:14,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:35:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:14,494 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:14,495 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:14,495 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:14,495 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:14,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:35:14,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:14,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:35:14,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:14,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:35:14,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:35:14,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:35:14,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:35:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:35:14,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39838235] [2020-09-21 11:35:14,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:35:14,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:35:14,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150935359] [2020-09-21 11:35:14,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:35:14,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:35:14,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:35:14,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:35:14,671 INFO L87 Difference]: Start difference. First operand 8228 states and 12694 transitions. Second operand 4 states. [2020-09-21 11:35:23,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:35:23,829 INFO L93 Difference]: Finished difference Result 24233 states and 37318 transitions. [2020-09-21 11:35:23,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:35:23,830 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-09-21 11:35:23,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:35:23,882 INFO L225 Difference]: With dead ends: 24233 [2020-09-21 11:35:23,882 INFO L226 Difference]: Without dead ends: 16134 [2020-09-21 11:35:23,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:35:23,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16134 states. [2020-09-21 11:35:24,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16134 to 16132. [2020-09-21 11:35:24,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16132 states. [2020-09-21 11:35:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 24741 transitions. [2020-09-21 11:35:24,388 INFO L78 Accepts]: Start accepts. Automaton has 16132 states and 24741 transitions. Word has length 332 [2020-09-21 11:35:24,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:35:24,389 INFO L479 AbstractCegarLoop]: Abstraction has 16132 states and 24741 transitions. [2020-09-21 11:35:24,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:35:24,389 INFO L276 IsEmpty]: Start isEmpty. Operand 16132 states and 24741 transitions. [2020-09-21 11:35:24,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-09-21 11:35:24,425 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:35:24,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:35:24,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:35:24,426 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:35:24,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:35:24,426 INFO L82 PathProgramCache]: Analyzing trace with hash -310142286, now seen corresponding path program 1 times [2020-09-21 11:35:24,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:35:24,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639525355] [2020-09-21 11:35:24,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:35:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:24,518 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:24,519 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:24,520 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:24,520 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:24,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-09-21 11:35:24,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:24,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 11:35:24,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:24,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:35:24,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:35:24,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:35:24,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:35:25,050 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-21 11:35:25,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:35:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:35:25,062 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:35:25,063 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:35:25,063 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:35:25,063 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:35:25,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:35:25,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:35:25,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:35:25,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:35:25,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:35:25,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:35:25,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:35:25,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:35:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:35:25,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639525355] [2020-09-21 11:35:25,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:35:25,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:35:25,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185352338] [2020-09-21 11:35:25,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:35:25,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:35:25,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:35:25,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:35:25,301 INFO L87 Difference]: Start difference. First operand 16132 states and 24741 transitions. Second operand 4 states.