/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=0.2 --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 11:27:56,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:27:56,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:27:56,454 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:27:56,454 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:27:56,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:27:56,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:27:56,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:27:56,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:27:56,461 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:27:56,462 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:27:56,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:27:56,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:27:56,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:27:56,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:27:56,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:27:56,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:27:56,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:27:56,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:27:56,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:27:56,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:27:56,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:27:56,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:27:56,477 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:27:56,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:27:56,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:27:56,480 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:27:56,481 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:27:56,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:27:56,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:27:56,483 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:27:56,484 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:27:56,485 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:27:56,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:27:56,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:27:56,487 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:27:56,488 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:27:56,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:27:56,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:27:56,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:27:56,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:27:56,491 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 11:27:56,546 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:27:56,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:27:56,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:27:56,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:27:56,548 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:27:56,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:27:56,551 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:27:56,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:27:56,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:27:56,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:27:56,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:27:56,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:27:56,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:27:56,553 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:27:56,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:27:56,553 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:27:56,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:27:56,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:27:56,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:27:56,554 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:27:56,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:27:56,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:27:56,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:27:56,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:27:56,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:27:56,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:27:56,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:27:56,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:27:56,556 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:27:56,557 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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;log-additional-information=true; [2020-09-25 11:27:57,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:27:57,058 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:27:57,062 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:27:57,064 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:27:57,064 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:27:57,066 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 11:27:57,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d09b0826/6b68e71fa29c4edc80c4e42d15dadedd/FLAGd3864b3da [2020-09-25 11:27:57,878 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:27:57,879 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 11:27:57,903 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d09b0826/6b68e71fa29c4edc80c4e42d15dadedd/FLAGd3864b3da [2020-09-25 11:27:58,058 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4d09b0826/6b68e71fa29c4edc80c4e42d15dadedd [2020-09-25 11:27:58,073 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:27:58,080 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:27:58,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:27:58,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:27:58,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:27:58,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:27:58" (1/1) ... [2020-09-25 11:27:58,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2acd657e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:58, skipping insertion in model container [2020-09-25 11:27:58,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:27:58" (1/1) ... [2020-09-25 11:27:58,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:27:58,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:27:59,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:27:59,397 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:27:59,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:27:59,940 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:27:59,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:59 WrapperNode [2020-09-25 11:27:59,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:27:59,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:27:59,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:27:59,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:27:59,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:59" (1/1) ... [2020-09-25 11:27:59,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:59" (1/1) ... [2020-09-25 11:28:00,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:59" (1/1) ... [2020-09-25 11:28:00,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:59" (1/1) ... [2020-09-25 11:28:00,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:59" (1/1) ... [2020-09-25 11:28:00,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:59" (1/1) ... [2020-09-25 11:28:00,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:59" (1/1) ... [2020-09-25 11:28:00,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:28:00,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:28:00,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:28:00,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:28:00,170 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:59" (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 11:28:00,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:28:00,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:28:00,274 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 11:28:00,274 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:28:00,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:28:00,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 11:28:00,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 11:28:00,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 11:28:00,277 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 11:28:00,277 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 11:28:00,277 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 11:28:00,277 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 11:28:00,278 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 11:28:00,278 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 11:28:00,278 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 11:28:00,279 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 11:28:00,279 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-25 11:28:00,279 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 11:28:00,280 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 11:28:00,280 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:28:00,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:28:00,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:28:03,390 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:28:03,391 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 11:28:03,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:28:03 BoogieIcfgContainer [2020-09-25 11:28:03,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:28:03,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:28:03,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:28:03,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:28:03,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:27:58" (1/3) ... [2020-09-25 11:28:03,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dda98b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:28:03, skipping insertion in model container [2020-09-25 11:28:03,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:59" (2/3) ... [2020-09-25 11:28:03,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dda98b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:28:03, skipping insertion in model container [2020-09-25 11:28:03,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:28:03" (3/3) ... [2020-09-25 11:28:03,424 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 11:28:03,436 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:28:03,451 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:28:03,473 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:28:03,513 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:28:03,513 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:28:03,513 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:28:03,514 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:28:03,514 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:28:03,514 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:28:03,514 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:28:03,514 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:28:03,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states. [2020-09-25 11:28:03,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 918 [2020-09-25 11:28:03,669 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:28:03,672 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 11:28:03,672 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:28:03,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:28:03,681 INFO L82 PathProgramCache]: Analyzing trace with hash -33800225, now seen corresponding path program 1 times [2020-09-25 11:28:03,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:28:03,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382789668] [2020-09-25 11:28:03,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:28:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:28:05,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:06,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:06,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:07,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:07,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:08,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:08,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:09,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:09,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:28:09,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 924 [2020-09-25 11:28:09,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 11:28:09,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-09-25 11:28:09,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:28:09,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:28:09,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:28:09,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 390 [2020-09-25 11:28:09,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 497 [2020-09-25 11:28:09,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 11:28:11,100 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-25 11:28:11,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:28:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:28:11,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:11,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:28:11,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 11:28:11,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:28:11,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-25 11:28:11,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:28:11,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:28:11,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:28:11,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:28:11,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:28:11,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:28:12,213 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 11:28:12,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382789668] [2020-09-25 11:28:12,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:28:12,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 11:28:12,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084298961] [2020-09-25 11:28:12,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 11:28:12,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:28:12,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 11:28:12,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:28:12,243 INFO L87 Difference]: Start difference. First operand 1994 states. Second operand 4 states. [2020-09-25 11:28:21,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:28:21,049 INFO L93 Difference]: Finished difference Result 3363 states and 4438 transitions. [2020-09-25 11:28:21,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 11:28:21,052 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 917 [2020-09-25 11:28:21,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:28:21,097 INFO L225 Difference]: With dead ends: 3363 [2020-09-25 11:28:21,097 INFO L226 Difference]: Without dead ends: 2747 [2020-09-25 11:28:21,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:28:21,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2020-09-25 11:28:21,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 2734. [2020-09-25 11:28:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2734 states. [2020-09-25 11:28:21,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 3423 transitions. [2020-09-25 11:28:21,291 INFO L78 Accepts]: Start accepts. Automaton has 2734 states and 3423 transitions. Word has length 917 [2020-09-25 11:28:21,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:28:21,294 INFO L479 AbstractCegarLoop]: Abstraction has 2734 states and 3423 transitions. [2020-09-25 11:28:21,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 11:28:21,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2734 states and 3423 transitions. [2020-09-25 11:28:21,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 918 [2020-09-25 11:28:21,326 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:28:21,326 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 11:28:21,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:28:21,327 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:28:21,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:28:21,328 INFO L82 PathProgramCache]: Analyzing trace with hash -35077377, now seen corresponding path program 1 times [2020-09-25 11:28:21,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:28:21,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997740881] [2020-09-25 11:28:21,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:28:21,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:28:21,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:22,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:22,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:23,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:23,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:23,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:23,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:24,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:25,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:25,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:26,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:26,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:28:26,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 924 [2020-09-25 11:28:26,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 11:28:26,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-09-25 11:28:26,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:28:26,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:28:26,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:28:26,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 281 [2020-09-25 11:28:26,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 260 [2020-09-25 11:28:26,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-25 11:28:27,805 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-25 11:28:27,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:28:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:28:27,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:27,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:28:27,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 11:28:27,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:28:27,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-09-25 11:28:27,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:28:27,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:28:27,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:28:27,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:28:27,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:28:27,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:28:28,656 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 11:28:28,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997740881] [2020-09-25 11:28:28,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:28:28,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 11:28:28,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543508808] [2020-09-25 11:28:28,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:28:28,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:28:28,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:28:28,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:28:28,662 INFO L87 Difference]: Start difference. First operand 2734 states and 3423 transitions. Second operand 5 states. [2020-09-25 11:28:41,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:28:41,524 INFO L93 Difference]: Finished difference Result 7392 states and 9359 transitions. [2020-09-25 11:28:41,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:28:41,524 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 917 [2020-09-25 11:28:41,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:28:41,548 INFO L225 Difference]: With dead ends: 7392 [2020-09-25 11:28:41,549 INFO L226 Difference]: Without dead ends: 5070 [2020-09-25 11:28:41,555 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 11:28:41,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5070 states. [2020-09-25 11:28:41,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5070 to 5068. [2020-09-25 11:28:41,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5068 states. [2020-09-25 11:28:41,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5068 states to 5068 states and 6390 transitions. [2020-09-25 11:28:41,740 INFO L78 Accepts]: Start accepts. Automaton has 5068 states and 6390 transitions. Word has length 917 [2020-09-25 11:28:41,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:28:41,742 INFO L479 AbstractCegarLoop]: Abstraction has 5068 states and 6390 transitions. [2020-09-25 11:28:41,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:28:41,743 INFO L276 IsEmpty]: Start isEmpty. Operand 5068 states and 6390 transitions. [2020-09-25 11:28:41,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 920 [2020-09-25 11:28:41,765 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:28:41,766 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 11:28:41,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:28:41,767 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:28:41,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:28:41,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1407504004, now seen corresponding path program 1 times [2020-09-25 11:28:41,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:28:41,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024097485] [2020-09-25 11:28:41,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:28:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:28:42,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:42,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:42,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:43,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:43,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:43,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:44,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:44,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:45,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:45,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:46,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:46,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:47,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:28:47,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 926 [2020-09-25 11:28:47,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-25 11:28:47,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5123 [2020-09-25 11:28:47,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:28:47,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:28:47,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:28:47,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 278 [2020-09-25 11:28:47,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 264 [2020-09-25 11:28:47,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1