/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 12:35:01,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 12:35:01,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 12:35:01,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 12:35:01,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 12:35:01,318 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 12:35:01,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 12:35:01,322 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 12:35:01,324 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 12:35:01,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 12:35:01,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 12:35:01,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 12:35:01,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 12:35:01,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 12:35:01,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 12:35:01,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 12:35:01,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 12:35:01,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 12:35:01,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 12:35:01,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 12:35:01,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 12:35:01,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 12:35:01,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 12:35:01,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 12:35:01,346 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 12:35:01,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 12:35:01,347 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 12:35:01,348 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 12:35:01,348 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 12:35:01,350 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 12:35:01,350 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 12:35:01,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 12:35:01,352 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 12:35:01,353 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 12:35:01,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 12:35:01,354 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 12:35:01,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 12:35:01,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 12:35:01,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 12:35:01,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 12:35:01,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 12:35:01,359 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 12:35:01,389 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 12:35:01,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 12:35:01,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 12:35:01,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 12:35:01,392 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 12:35:01,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 12:35:01,392 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 12:35:01,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 12:35:01,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 12:35:01,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 12:35:01,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 12:35:01,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 12:35:01,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 12:35:01,393 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 12:35:01,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 12:35:01,394 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 12:35:01,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 12:35:01,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 12:35:01,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 12:35:01,395 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 12:35:01,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 12:35:01,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:35:01,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 12:35:01,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 12:35:01,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 12:35:01,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 12:35:01,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 12:35:01,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 12:35:01,397 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 12:35:01,397 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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-09-25 12:35:01,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 12:35:01,919 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 12:35:01,927 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 12:35:01,929 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 12:35:01,930 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 12:35:01,932 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 12:35:02,027 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/216105f12/dd48142a703e45ed92cce91eead48531/FLAG360b9e033 [2020-09-25 12:35:02,773 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 12:35:02,774 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 12:35:02,808 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/216105f12/dd48142a703e45ed92cce91eead48531/FLAG360b9e033 [2020-09-25 12:35:02,943 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/216105f12/dd48142a703e45ed92cce91eead48531 [2020-09-25 12:35:02,958 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 12:35:02,965 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 12:35:02,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 12:35:02,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 12:35:02,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 12:35:02,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:35:02" (1/1) ... [2020-09-25 12:35:02,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@701ef800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:35:02, skipping insertion in model container [2020-09-25 12:35:02,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:35:02" (1/1) ... [2020-09-25 12:35:02,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 12:35:03,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 12:35:04,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:35:04,377 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 12:35:04,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:35:04,933 INFO L208 MainTranslator]: Completed translation [2020-09-25 12:35:04,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:35:04 WrapperNode [2020-09-25 12:35:04,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 12:35:04,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 12:35:04,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 12:35:04,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 12:35:04,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:35:04" (1/1) ... [2020-09-25 12:35:04,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:35:04" (1/1) ... [2020-09-25 12:35:05,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:35:04" (1/1) ... [2020-09-25 12:35:05,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:35:04" (1/1) ... [2020-09-25 12:35:05,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:35:04" (1/1) ... [2020-09-25 12:35:05,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:35:04" (1/1) ... [2020-09-25 12:35:05,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:35:04" (1/1) ... [2020-09-25 12:35:05,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 12:35:05,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 12:35:05,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 12:35:05,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 12:35:05,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:35:04" (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 12:35:05,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 12:35:05,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 12:35:05,315 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 12:35:05,315 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 12:35:05,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 12:35:05,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 12:35:05,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 12:35:05,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 12:35:05,317 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 12:35:05,317 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 12:35:05,317 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 12:35:05,317 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 12:35:05,317 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 12:35:05,317 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 12:35:05,318 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 12:35:05,318 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 12:35:05,318 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-25 12:35:05,318 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 12:35:05,318 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 12:35:05,319 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 12:35:05,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 12:35:05,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 12:35:08,713 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 12:35:08,714 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 12:35:08,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:35:08 BoogieIcfgContainer [2020-09-25 12:35:08,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 12:35:08,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 12:35:08,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 12:35:08,743 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 12:35:08,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:35:02" (1/3) ... [2020-09-25 12:35:08,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f48c57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:35:08, skipping insertion in model container [2020-09-25 12:35:08,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:35:04" (2/3) ... [2020-09-25 12:35:08,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f48c57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:35:08, skipping insertion in model container [2020-09-25 12:35:08,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:35:08" (3/3) ... [2020-09-25 12:35:08,750 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 12:35:08,766 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 12:35:08,782 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 12:35:08,806 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 12:35:08,860 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 12:35:08,860 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 12:35:08,860 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 12:35:08,861 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 12:35:08,861 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 12:35:08,861 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 12:35:08,861 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 12:35:08,861 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 12:35:08,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states. [2020-09-25 12:35:08,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 909 [2020-09-25 12:35:08,989 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:35:08,992 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] [2020-09-25 12:35:08,993 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:35:09,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:35:09,003 INFO L82 PathProgramCache]: Analyzing trace with hash -2948384, now seen corresponding path program 1 times [2020-09-25 12:35:09,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:35:09,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370615635] [2020-09-25 12:35:09,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:35:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:35:10,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:11,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:12,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:12,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:13,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:13,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:13,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:13,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:14,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:15,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:35:15,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 915 [2020-09-25 12:35:15,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 12:35:15,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5139 [2020-09-25 12:35:15,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:35:15,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:35:15,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:35:15,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 378 [2020-09-25 12:35:15,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 500 [2020-09-25 12:35:15,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-09-25 12:35:16,638 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-25 12:35:16,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:35:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:35:16,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:16,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:35:16,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 12:35:16,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:35:16,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-09-25 12:35:16,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:35:16,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:35:16,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:35:16,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:35:16,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:35:16,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:35:18,202 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 12:35:18,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370615635] [2020-09-25 12:35:18,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:35:18,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 12:35:18,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405985907] [2020-09-25 12:35:18,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 12:35:18,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:35:18,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 12:35:18,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 12:35:18,236 INFO L87 Difference]: Start difference. First operand 1994 states. Second operand 4 states. [2020-09-25 12:35:27,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:35:27,485 INFO L93 Difference]: Finished difference Result 3387 states and 4474 transitions. [2020-09-25 12:35:27,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 12:35:27,488 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 908 [2020-09-25 12:35:27,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:35:27,536 INFO L225 Difference]: With dead ends: 3387 [2020-09-25 12:35:27,536 INFO L226 Difference]: Without dead ends: 2783 [2020-09-25 12:35:27,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 12:35:27,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2020-09-25 12:35:27,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2770. [2020-09-25 12:35:27,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2770 states. [2020-09-25 12:35:27,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 3483 transitions. [2020-09-25 12:35:27,765 INFO L78 Accepts]: Start accepts. Automaton has 2770 states and 3483 transitions. Word has length 908 [2020-09-25 12:35:27,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:35:27,768 INFO L479 AbstractCegarLoop]: Abstraction has 2770 states and 3483 transitions. [2020-09-25 12:35:27,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 12:35:27,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2770 states and 3483 transitions. [2020-09-25 12:35:27,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 909 [2020-09-25 12:35:27,802 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:35:27,803 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] [2020-09-25 12:35:27,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 12:35:27,804 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:35:27,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:35:27,805 INFO L82 PathProgramCache]: Analyzing trace with hash -4225536, now seen corresponding path program 1 times [2020-09-25 12:35:27,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:35:27,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300937647] [2020-09-25 12:35:27,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:35:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:35:28,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:28,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:29,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:29,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:29,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:30,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:30,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:30,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:31,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:33,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:35:33,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 915 [2020-09-25 12:35:33,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 12:35:33,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-09-25 12:35:33,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:35:33,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:35:33,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 12:35:33,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 279 [2020-09-25 12:35:33,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 260 [2020-09-25 12:35:33,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-09-25 12:35:34,306 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-25 12:35:34,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:35:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:35:34,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:34,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:35:34,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 12:35:34,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:35:34,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-25 12:35:34,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:35:34,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:35:34,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:35:34,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:35:34,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:35:34,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:35:35,189 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 12:35:35,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300937647] [2020-09-25 12:35:35,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:35:35,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 12:35:35,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388732943] [2020-09-25 12:35:35,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:35:35,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:35:35,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:35:35,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:35:35,219 INFO L87 Difference]: Start difference. First operand 2770 states and 3483 transitions. Second operand 5 states. [2020-09-25 12:35:49,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:35:49,079 INFO L93 Difference]: Finished difference Result 7586 states and 9661 transitions. [2020-09-25 12:35:49,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 12:35:49,080 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 908 [2020-09-25 12:35:49,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:35:49,105 INFO L225 Difference]: With dead ends: 7586 [2020-09-25 12:35:49,105 INFO L226 Difference]: Without dead ends: 5158 [2020-09-25 12:35:49,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 12:35:49,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2020-09-25 12:35:49,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 5156. [2020-09-25 12:35:49,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5156 states. [2020-09-25 12:35:49,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5156 states to 5156 states and 6529 transitions. [2020-09-25 12:35:49,314 INFO L78 Accepts]: Start accepts. Automaton has 5156 states and 6529 transitions. Word has length 908 [2020-09-25 12:35:49,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:35:49,315 INFO L479 AbstractCegarLoop]: Abstraction has 5156 states and 6529 transitions. [2020-09-25 12:35:49,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:35:49,316 INFO L276 IsEmpty]: Start isEmpty. Operand 5156 states and 6529 transitions. [2020-09-25 12:35:49,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 911 [2020-09-25 12:35:49,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:35:49,340 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] [2020-09-25 12:35:49,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 12:35:49,342 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:35:49,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:35:49,343 INFO L82 PathProgramCache]: Analyzing trace with hash -561397094, now seen corresponding path program 1 times [2020-09-25 12:35:49,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:35:49,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960407839] [2020-09-25 12:35:49,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:35:49,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:35:49,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:49,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:50,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:50,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:50,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:51,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:51,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:35:51,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking...