/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 SingleStatement --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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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-c90d42b [2020-09-25 05:47:02,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 05:47:02,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 05:47:02,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 05:47:02,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 05:47:02,278 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 05:47:02,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 05:47:02,284 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 05:47:02,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 05:47:02,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 05:47:02,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 05:47:02,295 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 05:47:02,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 05:47:02,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 05:47:02,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 05:47:02,305 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 05:47:02,306 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 05:47:02,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 05:47:02,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 05:47:02,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 05:47:02,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 05:47:02,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 05:47:02,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 05:47:02,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 05:47:02,335 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 05:47:02,336 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 05:47:02,336 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 05:47:02,344 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 05:47:02,344 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 05:47:02,346 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 05:47:02,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 05:47:02,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 05:47:02,350 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 05:47:02,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 05:47:02,351 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 05:47:02,352 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 05:47:02,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 05:47:02,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 05:47:02,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 05:47:02,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 05:47:02,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 05:47:02,359 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 [2020-09-25 05:47:02,384 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 05:47:02,384 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 05:47:02,386 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 05:47:02,386 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 05:47:02,386 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 05:47:02,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 05:47:02,387 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 05:47:02,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 05:47:02,387 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 05:47:02,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 05:47:02,387 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 05:47:02,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 05:47:02,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 05:47:02,388 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 05:47:02,388 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 05:47:02,388 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 05:47:02,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 05:47:02,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 05:47:02,389 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 05:47:02,389 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 05:47:02,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 05:47:02,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:47:02,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 05:47:02,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 05:47:02,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 05:47:02,391 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 05:47:02,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 05:47:02,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 05:47:02,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 05:47:02,391 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 -> SingleStatement 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=WIDESTAMONGSMALL;tolerance=0.4;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;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;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;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;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;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;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;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;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;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-09-25 05:47:02,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 05:47:02,843 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 05:47:02,848 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 05:47:02,850 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 05:47:02,850 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 05:47:02,851 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 05:47:02,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cffcf5f77/e0f8ca4842a04bb6a41c8d7cb55ba204/FLAGe025ba413 [2020-09-25 05:47:03,658 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 05:47:03,659 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 05:47:03,679 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cffcf5f77/e0f8ca4842a04bb6a41c8d7cb55ba204/FLAGe025ba413 [2020-09-25 05:47:03,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cffcf5f77/e0f8ca4842a04bb6a41c8d7cb55ba204 [2020-09-25 05:47:03,853 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 05:47:03,859 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 05:47:03,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 05:47:03,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 05:47:03,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 05:47:03,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:47:03" (1/1) ... [2020-09-25 05:47:03,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33d5d851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:47:03, skipping insertion in model container [2020-09-25 05:47:03,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:47:03" (1/1) ... [2020-09-25 05:47:03,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 05:47:04,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 05:47:05,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:47:05,196 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 05:47:05,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:47:06,013 INFO L208 MainTranslator]: Completed translation [2020-09-25 05:47:06,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:47:06 WrapperNode [2020-09-25 05:47:06,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 05:47:06,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 05:47:06,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 05:47:06,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 05:47:06,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:47:06" (1/1) ... [2020-09-25 05:47:06,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:47:06" (1/1) ... [2020-09-25 05:47:06,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:47:06" (1/1) ... [2020-09-25 05:47:06,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:47:06" (1/1) ... [2020-09-25 05:47:06,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:47:06" (1/1) ... [2020-09-25 05:47:06,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:47:06" (1/1) ... [2020-09-25 05:47:06,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:47:06" (1/1) ... [2020-09-25 05:47:06,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 05:47:06,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 05:47:06,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 05:47:06,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 05:47:06,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:47:06" (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 [2020-09-25 05:47:06,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 05:47:06,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 05:47:06,313 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 05:47:06,313 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 05:47:06,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 05:47:06,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 05:47:06,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 05:47:06,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 05:47:06,315 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 05:47:06,316 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 05:47:06,316 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 05:47:06,316 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 05:47:06,316 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 05:47:06,316 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 05:47:06,317 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 05:47:06,318 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 05:47:06,318 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-25 05:47:06,318 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 05:47:06,318 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 05:47:06,319 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 05:47:06,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 05:47:06,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 05:47:09,640 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 05:47:09,640 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 05:47:09,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:47:09 BoogieIcfgContainer [2020-09-25 05:47:09,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 05:47:09,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 05:47:09,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 05:47:09,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 05:47:09,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 05:47:03" (1/3) ... [2020-09-25 05:47:09,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@accd67f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:47:09, skipping insertion in model container [2020-09-25 05:47:09,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:47:06" (2/3) ... [2020-09-25 05:47:09,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@accd67f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:47:09, skipping insertion in model container [2020-09-25 05:47:09,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:47:09" (3/3) ... [2020-09-25 05:47:09,676 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 05:47:09,688 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 05:47:09,703 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 05:47:09,726 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 05:47:09,763 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 05:47:09,763 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 05:47:09,764 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 05:47:09,764 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 05:47:09,764 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 05:47:09,764 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 05:47:09,764 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 05:47:09,764 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 05:47:09,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states. [2020-09-25 05:47:09,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2020-09-25 05:47:09,888 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:47:09,890 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:47:09,891 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:47:09,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:47:09,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1035850514, now seen corresponding path program 1 times [2020-09-25 05:47:09,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:47:09,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139805908] [2020-09-25 05:47:09,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:47:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:47:11,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:12,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:13,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:13,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:14,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:14,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:14,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:15,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:15,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:47:15,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 927 [2020-09-25 05:47:15,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 05:47:15,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-09-25 05:47:15,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:47:15,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:47:15,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:47:15,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 387 [2020-09-25 05:47:15,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 464 [2020-09-25 05:47:15,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 05:47:17,292 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-25 05:47:17,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:47:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:47:17,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:17,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:47:17,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 05:47:17,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:47:17,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-09-25 05:47:17,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:47:17,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:47:17,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:47:17,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:47:17,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:47:17,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:47:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:47:18,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139805908] [2020-09-25 05:47:18,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:47:18,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 05:47:18,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497309284] [2020-09-25 05:47:18,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 05:47:18,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:47:18,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 05:47:18,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:47:18,524 INFO L87 Difference]: Start difference. First operand 2018 states. Second operand 4 states. [2020-09-25 05:47:28,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:47:28,015 INFO L93 Difference]: Finished difference Result 3594 states and 4750 transitions. [2020-09-25 05:47:28,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 05:47:28,018 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 920 [2020-09-25 05:47:28,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:47:28,087 INFO L225 Difference]: With dead ends: 3594 [2020-09-25 05:47:28,088 INFO L226 Difference]: Without dead ends: 2873 [2020-09-25 05:47:28,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:47:28,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2020-09-25 05:47:28,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 2860. [2020-09-25 05:47:28,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2860 states. [2020-09-25 05:47:28,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 3591 transitions. [2020-09-25 05:47:28,363 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 3591 transitions. Word has length 920 [2020-09-25 05:47:28,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:47:28,366 INFO L479 AbstractCegarLoop]: Abstraction has 2860 states and 3591 transitions. [2020-09-25 05:47:28,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 05:47:28,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 3591 transitions. [2020-09-25 05:47:28,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2020-09-25 05:47:28,429 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:47:28,430 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:47:28,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 05:47:28,431 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:47:28,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:47:28,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1742209874, now seen corresponding path program 1 times [2020-09-25 05:47:28,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:47:28,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241724367] [2020-09-25 05:47:28,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:47:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:47:29,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:29,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:30,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:30,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:30,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:31,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:31,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:32,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:32,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:33,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:33,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:34,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:47:34,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 927 [2020-09-25 05:47:34,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 05:47:34,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5206 [2020-09-25 05:47:34,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:47:34,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:47:34,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:47:34,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 281 [2020-09-25 05:47:34,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 260 [2020-09-25 05:47:34,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-25 05:47:34,989 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-25 05:47:34,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:47:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:47:35,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:35,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:47:35,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 05:47:35,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:47:35,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-25 05:47:35,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:47:35,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:47:35,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:47:35,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:47:35,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:47:35,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:47:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:47:35,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241724367] [2020-09-25 05:47:35,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:47:35,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 05:47:35,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876695648] [2020-09-25 05:47:35,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:47:35,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:47:35,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:47:35,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:47:35,901 INFO L87 Difference]: Start difference. First operand 2860 states and 3591 transitions. Second operand 5 states. [2020-09-25 05:47:49,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:47:49,566 INFO L93 Difference]: Finished difference Result 7848 states and 9978 transitions. [2020-09-25 05:47:49,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 05:47:49,566 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 920 [2020-09-25 05:47:49,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:47:49,593 INFO L225 Difference]: With dead ends: 7848 [2020-09-25 05:47:49,594 INFO L226 Difference]: Without dead ends: 5308 [2020-09-25 05:47:49,599 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 [2020-09-25 05:47:49,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5308 states. [2020-09-25 05:47:49,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5308 to 5306. [2020-09-25 05:47:49,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5306 states. [2020-09-25 05:47:49,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5306 states to 5306 states and 6703 transitions. [2020-09-25 05:47:49,754 INFO L78 Accepts]: Start accepts. Automaton has 5306 states and 6703 transitions. Word has length 920 [2020-09-25 05:47:49,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:47:49,755 INFO L479 AbstractCegarLoop]: Abstraction has 5306 states and 6703 transitions. [2020-09-25 05:47:49,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:47:49,755 INFO L276 IsEmpty]: Start isEmpty. Operand 5306 states and 6703 transitions. [2020-09-25 05:47:49,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 923 [2020-09-25 05:47:49,774 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:47:49,775 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:47:49,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 05:47:49,775 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:47:49,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:47:49,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1396485109, now seen corresponding path program 1 times [2020-09-25 05:47:49,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:47:49,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216695352] [2020-09-25 05:47:49,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:47:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:47:50,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:50,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:51,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:51,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:51,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:51,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:52,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:52,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:53,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking...