/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.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 05:47:06,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 05:47:06,214 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 05:47:06,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 05:47:06,264 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 05:47:06,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 05:47:06,273 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 05:47:06,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 05:47:06,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 05:47:06,284 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 05:47:06,285 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 05:47:06,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 05:47:06,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 05:47:06,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 05:47:06,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 05:47:06,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 05:47:06,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 05:47:06,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 05:47:06,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 05:47:06,303 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 05:47:06,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 05:47:06,310 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 05:47:06,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 05:47:06,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 05:47:06,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 05:47:06,321 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 05:47:06,321 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 05:47:06,325 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 05:47:06,326 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 05:47:06,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 05:47:06,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 05:47:06,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 05:47:06,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 05:47:06,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 05:47:06,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 05:47:06,335 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 05:47:06,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 05:47:06,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 05:47:06,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 05:47:06,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 05:47:06,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 05:47:06,340 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 05:47:06,392 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 05:47:06,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 05:47:06,394 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 05:47:06,394 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 05:47:06,395 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 05:47:06,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 05:47:06,395 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 05:47:06,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 05:47:06,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 05:47:06,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 05:47:06,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 05:47:06,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 05:47:06,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 05:47:06,398 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 05:47:06,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 05:47:06,399 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 05:47:06,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 05:47:06,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 05:47:06,399 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 05:47:06,399 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 05:47:06,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 05:47:06,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:47:06,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 05:47:06,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 05:47:06,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 05:47:06,401 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 05:47:06,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 05:47:06,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 05:47:06,401 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 05:47:06,401 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 05:47:06,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 05:47:06,863 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 05:47:06,870 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 05:47:06,872 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 05:47:06,872 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 05:47:06,873 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 05:47:06,951 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a57e80a0/59988c4198a348f3840d8e25e835f9ae/FLAG678894dd8 [2020-09-25 05:47:07,685 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 05:47:07,686 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 05:47:07,709 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a57e80a0/59988c4198a348f3840d8e25e835f9ae/FLAG678894dd8 [2020-09-25 05:47:07,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a57e80a0/59988c4198a348f3840d8e25e835f9ae [2020-09-25 05:47:07,826 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 05:47:07,830 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 05:47:07,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 05:47:07,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 05:47:07,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 05:47:07,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:47:07" (1/1) ... [2020-09-25 05:47:07,841 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@427cf79f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:47:07, skipping insertion in model container [2020-09-25 05:47:07,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:47:07" (1/1) ... [2020-09-25 05:47:07,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 05:47:07,986 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 05:47:09,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:47:09,201 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 05:47:09,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:47:09,753 INFO L208 MainTranslator]: Completed translation [2020-09-25 05:47:09,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:47:09 WrapperNode [2020-09-25 05:47:09,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 05:47:09,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 05:47:09,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 05:47:09,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 05:47:09,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:47:09" (1/1) ... [2020-09-25 05:47:09,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:47:09" (1/1) ... [2020-09-25 05:47:09,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:47:09" (1/1) ... [2020-09-25 05:47:09,847 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:47:09" (1/1) ... [2020-09-25 05:47:09,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:47:09" (1/1) ... [2020-09-25 05:47:09,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:47:09" (1/1) ... [2020-09-25 05:47:09,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:47:09" (1/1) ... [2020-09-25 05:47:09,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 05:47:09,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 05:47:09,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 05:47:09,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 05:47:09,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:47:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:47:10,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 05:47:10,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 05:47:10,097 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 05:47:10,097 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 05:47:10,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 05:47:10,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 05:47:10,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 05:47:10,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 05:47:10,099 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 05:47:10,100 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 05:47:10,100 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 05:47:10,100 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 05:47:10,100 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 05:47:10,101 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 05:47:10,101 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 05:47:10,102 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 05:47:10,103 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-25 05:47:10,103 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 05:47:10,103 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 05:47:10,103 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 05:47:10,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 05:47:10,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 05:47:13,404 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 05:47:13,404 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 05:47:13,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:47:13 BoogieIcfgContainer [2020-09-25 05:47:13,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 05:47:13,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 05:47:13,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 05:47:13,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 05:47:13,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 05:47:07" (1/3) ... [2020-09-25 05:47:13,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68c7db46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:47:13, skipping insertion in model container [2020-09-25 05:47:13,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:47:09" (2/3) ... [2020-09-25 05:47:13,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68c7db46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:47:13, skipping insertion in model container [2020-09-25 05:47:13,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:47:13" (3/3) ... [2020-09-25 05:47:13,442 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 05:47:13,458 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 05:47:13,481 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 05:47:13,512 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 05:47:13,560 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 05:47:13,560 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 05:47:13,560 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 05:47:13,560 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 05:47:13,560 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 05:47:13,561 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 05:47:13,561 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 05:47:13,561 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 05:47:13,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states. [2020-09-25 05:47:13,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 918 [2020-09-25 05:47:13,736 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:47:13,739 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] [2020-09-25 05:47:13,740 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:47:13,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:47:13,750 INFO L82 PathProgramCache]: Analyzing trace with hash -33800225, now seen corresponding path program 1 times [2020-09-25 05:47:13,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:47:13,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177363772] [2020-09-25 05:47:13,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:47:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:47:15,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:16,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:16,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:17,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:18,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:18,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:18,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:19,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:19,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:47:19,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 924 [2020-09-25 05:47:19,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 05:47:19,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5068 [2020-09-25 05:47:19,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:47:19,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:47:19,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:47:19,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 390 [2020-09-25 05:47:19,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 497 [2020-09-25 05:47:19,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 05:47:21,545 WARN L193 SmtUtils]: Spent 734.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-25 05:47:21,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:47:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:47:21,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:21,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:47:21,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 05:47:21,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:47:21,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-09-25 05:47:21,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:47:21,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:47:21,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:47:21,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:47:21,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:47:21,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 05:47:22,787 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 05:47:22,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177363772] [2020-09-25 05:47:22,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:47:22,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 05:47:22,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073113837] [2020-09-25 05:47:22,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 05:47:22,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:47:22,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 05:47:22,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:47:22,820 INFO L87 Difference]: Start difference. First operand 1994 states. Second operand 4 states. [2020-09-25 05:47:32,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:47:32,133 INFO L93 Difference]: Finished difference Result 3363 states and 4438 transitions. [2020-09-25 05:47:32,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 05:47:32,138 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 917 [2020-09-25 05:47:32,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:47:32,188 INFO L225 Difference]: With dead ends: 3363 [2020-09-25 05:47:32,188 INFO L226 Difference]: Without dead ends: 2747 [2020-09-25 05:47:32,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:47:32,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2020-09-25 05:47:32,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 2734. [2020-09-25 05:47:32,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2734 states. [2020-09-25 05:47:32,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 3423 transitions. [2020-09-25 05:47:32,384 INFO L78 Accepts]: Start accepts. Automaton has 2734 states and 3423 transitions. Word has length 917 [2020-09-25 05:47:32,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:47:32,387 INFO L479 AbstractCegarLoop]: Abstraction has 2734 states and 3423 transitions. [2020-09-25 05:47:32,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 05:47:32,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2734 states and 3423 transitions. [2020-09-25 05:47:32,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 918 [2020-09-25 05:47:32,430 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:47:32,431 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] [2020-09-25 05:47:32,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 05:47:32,432 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:47:32,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:47:32,433 INFO L82 PathProgramCache]: Analyzing trace with hash -35077377, now seen corresponding path program 1 times [2020-09-25 05:47:32,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:47:32,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530438974] [2020-09-25 05:47:32,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:47:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:47:33,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:33,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:34,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:34,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:34,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:35,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:35,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:35,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:36,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:37,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:37,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:37,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:47:37,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 924 [2020-09-25 05:47:37,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 05:47:37,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-09-25 05:47:37,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:47:37,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:47:37,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:47:37,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 281 [2020-09-25 05:47:37,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 260 [2020-09-25 05:47:37,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:47:39,285 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-25 05:47:39,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:47:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:47:39,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:39,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:47:39,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 05:47:39,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:47:39,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-09-25 05:47:39,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:47:39,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:47:39,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:47:39,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:47:39,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:47:39,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:47:40,365 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 05:47:40,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530438974] [2020-09-25 05:47:40,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:47:40,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 05:47:40,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022510524] [2020-09-25 05:47:40,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:47:40,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:47:40,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:47:40,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:47:40,373 INFO L87 Difference]: Start difference. First operand 2734 states and 3423 transitions. Second operand 5 states. [2020-09-25 05:47:54,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:47:54,719 INFO L93 Difference]: Finished difference Result 7392 states and 9359 transitions. [2020-09-25 05:47:54,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 05:47:54,720 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 917 [2020-09-25 05:47:54,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:47:54,751 INFO L225 Difference]: With dead ends: 7392 [2020-09-25 05:47:54,751 INFO L226 Difference]: Without dead ends: 5070 [2020-09-25 05:47:54,759 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 05:47:54,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5070 states. [2020-09-25 05:47:54,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5070 to 5068. [2020-09-25 05:47:54,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5068 states. [2020-09-25 05:47:54,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5068 states to 5068 states and 6390 transitions. [2020-09-25 05:47:54,963 INFO L78 Accepts]: Start accepts. Automaton has 5068 states and 6390 transitions. Word has length 917 [2020-09-25 05:47:54,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:47:54,964 INFO L479 AbstractCegarLoop]: Abstraction has 5068 states and 6390 transitions. [2020-09-25 05:47:54,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:47:54,964 INFO L276 IsEmpty]: Start isEmpty. Operand 5068 states and 6390 transitions. [2020-09-25 05:47:54,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 920 [2020-09-25 05:47:54,983 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:47:54,984 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] [2020-09-25 05:47:54,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 05:47:54,985 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:47:54,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:47:54,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1407504004, now seen corresponding path program 1 times [2020-09-25 05:47:54,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:47:54,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844833703] [2020-09-25 05:47:54,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:47:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:47:55,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:55,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:56,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:56,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:56,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:57,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:57,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:57,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking...