/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.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:27:56,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:27:56,403 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:27:56,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:27:56,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:27:56,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:27:56,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:27:56,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:27:56,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:27:56,477 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:27:56,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:27:56,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:27:56,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:27:56,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:27:56,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:27:56,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:27:56,489 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:27:56,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:27:56,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:27:56,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:27:56,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:27:56,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:27:56,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:27:56,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:27:56,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:27:56,513 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:27:56,513 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:27:56,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:27:56,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:27:56,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:27:56,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:27:56,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:27:56,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:27:56,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:27:56,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:27:56,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:27:56,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:27:56,526 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:27:56,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:27:56,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:27:56,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:27:56,530 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 11:27:56,578 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:27:56,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:27:56,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:27:56,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:27:56,581 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:27:56,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:27:56,581 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:27:56,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:27:56,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:27:56,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:27:56,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:27:56,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:27:56,584 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:27:56,584 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:27:56,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:27:56,584 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:27:56,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:27:56,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:27:56,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:27:56,585 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:27:56,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:27:56,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:27:56,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:27:56,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:27:56,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:27:56,587 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:27:56,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:27:56,587 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:27:56,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:27:56,587 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 11:27:57,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:27:57,058 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:27:57,065 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:27:57,067 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:27:57,068 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:27:57,069 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 11:27:57,145 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c0d372df7/7d20bd54ad0b432593f88bacacb1b628/FLAGaef9e0f98 [2020-09-25 11:27:57,832 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:27:57,833 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 11:27:57,862 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c0d372df7/7d20bd54ad0b432593f88bacacb1b628/FLAGaef9e0f98 [2020-09-25 11:27:57,959 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c0d372df7/7d20bd54ad0b432593f88bacacb1b628 [2020-09-25 11:27:57,971 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:27:57,976 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:27:57,977 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:27:57,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:27:57,981 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:27:57,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:27:57" (1/1) ... [2020-09-25 11:27:57,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c63137c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:57, skipping insertion in model container [2020-09-25 11:27:57,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:27:57" (1/1) ... [2020-09-25 11:27:57,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:27:58,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:27:59,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:27:59,376 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:27:59,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:27:59,963 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:27:59,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:27:59 WrapperNode [2020-09-25 11:27:59,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:27:59,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:27:59,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:27:59,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:27:59,993 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 11:27:59,996 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 11:28:00,058 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 11:28:00,059 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 11:28:00,137 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 11:28:00,173 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 11:28:00,182 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 11:28:00,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:28:00,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:28:00,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:28:00,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:28:00,204 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 11:28:00,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:28:00,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:28:00,323 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 11:28:00,324 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:28:00,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:28:00,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 11:28:00,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 11:28:00,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 11:28:00,325 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 11:28:00,325 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 11:28:00,325 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 11:28:00,326 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 11:28:00,326 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 11:28:00,326 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 11:28:00,326 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 11:28:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 11:28:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-25 11:28:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 11:28:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 11:28:00,328 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:28:00,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:28:00,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:28:03,586 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:28:03,587 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 11:28:03,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:28:03 BoogieIcfgContainer [2020-09-25 11:28:03,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:28:03,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:28:03,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:28:03,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:28:03,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:27:57" (1/3) ... [2020-09-25 11:28:03,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c384853 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 11:28:03,612 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 11:28:03,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c384853 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 11:28:03,612 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 11:28:03,615 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 11:28:03,631 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:28:03,645 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:28:03,671 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:28:03,716 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:28:03,716 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:28:03,717 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:28:03,717 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:28:03,717 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:28:03,717 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:28:03,717 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:28:03,718 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:28:03,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states. [2020-09-25 11:28:03,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2020-09-25 11:28:03,846 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:28:03,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:28:03,849 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:28:03,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:28:03,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1035850514, now seen corresponding path program 1 times [2020-09-25 11:28:03,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:28:03,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447705368] [2020-09-25 11:28:03,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:28:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:28:05,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:06,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:07,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:07,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:07,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:08,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:08,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:09,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:10,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:10,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:28:10,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 927 [2020-09-25 11:28:10,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 11:28:10,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5239 [2020-09-25 11:28:10,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:28:10,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:28:10,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:28:10,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 387 [2020-09-25 11:28:10,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 464 [2020-09-25 11:28:10,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 11:28:11,609 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-25 11:28:11,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:28:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:28:11,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:11,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:28:11,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 11:28:11,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:28:11,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-09-25 11:28:11,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:28:11,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:28:11,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:28:11,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:28:11,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:28:11,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:28:13,040 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 11:28:13,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447705368] [2020-09-25 11:28:13,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:28:13,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 11:28:13,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085507140] [2020-09-25 11:28:13,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 11:28:13,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:28:13,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 11:28:13,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:28:13,077 INFO L87 Difference]: Start difference. First operand 2018 states. Second operand 4 states. [2020-09-25 11:28:22,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:28:22,898 INFO L93 Difference]: Finished difference Result 3594 states and 4750 transitions. [2020-09-25 11:28:22,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 11:28:22,902 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 920 [2020-09-25 11:28:22,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:28:22,980 INFO L225 Difference]: With dead ends: 3594 [2020-09-25 11:28:22,981 INFO L226 Difference]: Without dead ends: 2873 [2020-09-25 11:28:22,997 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 11:28:23,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2020-09-25 11:28:23,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 2860. [2020-09-25 11:28:23,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2860 states. [2020-09-25 11:28:23,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 3591 transitions. [2020-09-25 11:28:23,255 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 3591 transitions. Word has length 920 [2020-09-25 11:28:23,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:28:23,260 INFO L479 AbstractCegarLoop]: Abstraction has 2860 states and 3591 transitions. [2020-09-25 11:28:23,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 11:28:23,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 3591 transitions. [2020-09-25 11:28:23,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2020-09-25 11:28:23,328 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:28:23,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:28:23,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:28:23,330 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:28:23,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:28:23,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1742209874, now seen corresponding path program 1 times [2020-09-25 11:28:23,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:28:23,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62969906] [2020-09-25 11:28:23,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:28:23,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:28:24,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:24,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:25,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:25,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:25,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:26,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:26,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:27,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:27,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:28,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:28,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:28:28,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 927 [2020-09-25 11:28:28,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 11:28:28,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-25 11:28:28,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:28:28,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:28:28,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:28:28,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 281 [2020-09-25 11:28:28,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 260 [2020-09-25 11:28:28,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-09-25 11:28:30,073 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-25 11:28:30,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:28:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:28:30,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:30,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:28:30,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 11:28:30,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:28:30,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-25 11:28:30,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:28:30,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:28:30,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:28:30,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:28:30,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:28:30,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:28:31,912 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 11:28:31,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62969906] [2020-09-25 11:28:31,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:28:31,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 11:28:31,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182947626] [2020-09-25 11:28:31,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:28:31,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:28:31,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:28:31,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:28:31,920 INFO L87 Difference]: Start difference. First operand 2860 states and 3591 transitions. Second operand 5 states. [2020-09-25 11:28:45,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:28:45,548 INFO L93 Difference]: Finished difference Result 7848 states and 9978 transitions. [2020-09-25 11:28:45,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:28:45,549 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 920 [2020-09-25 11:28:45,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:28:45,575 INFO L225 Difference]: With dead ends: 7848 [2020-09-25 11:28:45,575 INFO L226 Difference]: Without dead ends: 5308 [2020-09-25 11:28:45,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:28:45,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5308 states. [2020-09-25 11:28:45,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5308 to 5306. [2020-09-25 11:28:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5306 states. [2020-09-25 11:28:45,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5306 states to 5306 states and 6703 transitions. [2020-09-25 11:28:45,734 INFO L78 Accepts]: Start accepts. Automaton has 5306 states and 6703 transitions. Word has length 920 [2020-09-25 11:28:45,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:28:45,736 INFO L479 AbstractCegarLoop]: Abstraction has 5306 states and 6703 transitions. [2020-09-25 11:28:45,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:28:45,736 INFO L276 IsEmpty]: Start isEmpty. Operand 5306 states and 6703 transitions. [2020-09-25 11:28:45,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 923 [2020-09-25 11:28:45,771 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:28:45,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:28:45,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:28:45,772 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:28:45,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:28:45,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1396485109, now seen corresponding path program 1 times [2020-09-25 11:28:45,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:28:45,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748042361] [2020-09-25 11:28:45,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:28:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:28:46,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:46,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:46,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:47,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:28:47,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking...