/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 19:36:59,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:36:59,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:36:59,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:36:59,326 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:36:59,328 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:36:59,329 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:36:59,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:36:59,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:36:59,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:36:59,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:36:59,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:36:59,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:36:59,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:36:59,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:36:59,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:36:59,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:36:59,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:36:59,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:36:59,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:36:59,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:36:59,363 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:36:59,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:36:59,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:36:59,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:36:59,375 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:36:59,375 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:36:59,379 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:36:59,379 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:36:59,382 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:36:59,382 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:36:59,383 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:36:59,384 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:36:59,386 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:36:59,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:36:59,388 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:36:59,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:36:59,389 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:36:59,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:36:59,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:36:59,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:36:59,394 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 [2020-09-24 19:36:59,453 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:36:59,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:36:59,455 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:36:59,455 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:36:59,455 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:36:59,456 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:36:59,457 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:36:59,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:36:59,457 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:36:59,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:36:59,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:36:59,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:36:59,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:36:59,459 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:36:59,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:36:59,460 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:36:59,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:36:59,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:36:59,460 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:36:59,461 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:36:59,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:36:59,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:36:59,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:36:59,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:36:59,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:36:59,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:36:59,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:36:59,462 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:36:59,462 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:36:59,463 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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 19:36:59,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:37:00,007 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:37:00,012 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:37:00,014 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:37:00,015 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:37:00,016 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-24 19:37:00,105 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2dfcecba2/192c48d9e7ea44cb87ea289dd96f33df/FLAGb1132ec93 [2020-09-24 19:37:00,763 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:37:00,768 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-24 19:37:00,786 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2dfcecba2/192c48d9e7ea44cb87ea289dd96f33df/FLAGb1132ec93 [2020-09-24 19:37:00,978 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2dfcecba2/192c48d9e7ea44cb87ea289dd96f33df [2020-09-24 19:37:00,994 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:37:01,003 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:37:01,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:37:01,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:37:01,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:37:01,012 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:37:00" (1/1) ... [2020-09-24 19:37:01,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b2f3aa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:01, skipping insertion in model container [2020-09-24 19:37:01,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:37:00" (1/1) ... [2020-09-24 19:37:01,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:37:01,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:37:01,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:37:01,881 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:37:02,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:37:02,338 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:37:02,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:02 WrapperNode [2020-09-24 19:37:02,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:37:02,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:37:02,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:37:02,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:37:02,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:02" (1/1) ... [2020-09-24 19:37:02,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:02" (1/1) ... [2020-09-24 19:37:02,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:02" (1/1) ... [2020-09-24 19:37:02,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:02" (1/1) ... [2020-09-24 19:37:02,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:02" (1/1) ... [2020-09-24 19:37:02,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:02" (1/1) ... [2020-09-24 19:37:02,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:02" (1/1) ... [2020-09-24 19:37:02,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:37:02,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:37:02,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:37:02,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:37:02,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:02" (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 [2020-09-24 19:37:02,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:37:02,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:37:02,599 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 19:37:02,599 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:37:02,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:37:02,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 19:37:02,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-24 19:37:02,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 19:37:02,602 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 19:37:02,602 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 19:37:02,603 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 19:37:02,603 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 19:37:02,603 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 19:37:02,603 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 19:37:02,603 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 19:37:02,605 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 19:37:02,605 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 19:37:02,606 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 19:37:02,606 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:37:02,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:37:02,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:37:04,981 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:37:04,982 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 19:37:04,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:37:04 BoogieIcfgContainer [2020-09-24 19:37:04,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:37:04,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:37:04,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:37:05,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:37:05,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:37:00" (1/3) ... [2020-09-24 19:37:05,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ae603a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:37:05, skipping insertion in model container [2020-09-24 19:37:05,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:37:02" (2/3) ... [2020-09-24 19:37:05,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ae603a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:37:05, skipping insertion in model container [2020-09-24 19:37:05,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:37:04" (3/3) ... [2020-09-24 19:37:05,007 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-09-24 19:37:05,025 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:37:05,046 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-09-24 19:37:05,069 INFO L251 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-09-24 19:37:05,103 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:37:05,104 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:37:05,104 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:37:05,104 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:37:05,104 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:37:05,104 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:37:05,104 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:37:05,104 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:37:05,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states. [2020-09-24 19:37:05,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-09-24 19:37:05,192 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:37:05,194 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] [2020-09-24 19:37:05,195 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:37:05,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:37:05,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1303335379, now seen corresponding path program 1 times [2020-09-24 19:37:05,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:37:05,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56728853] [2020-09-24 19:37:05,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:37:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:06,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:06,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:06,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:07,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:07,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-09-24 19:37:07,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 19:37:07,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1132 [2020-09-24 19:37:07,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:07,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:37:07,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 207 [2020-09-24 19:37:07,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-09-24 19:37:07,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 19:37:07,698 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-24 19:37:07,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:37:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:07,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:07,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:07,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-24 19:37:07,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:37:07,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-09-24 19:37:07,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:07,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:37:07,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:37:07,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:37:07,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:37:08,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:37:08,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56728853] [2020-09-24 19:37:08,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:37:08,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:37:08,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578767964] [2020-09-24 19:37:08,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:37:08,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:37:08,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:37:08,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:37:08,192 INFO L87 Difference]: Start difference. First operand 1233 states. Second operand 4 states. [2020-09-24 19:37:13,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:37:13,095 INFO L93 Difference]: Finished difference Result 2019 states and 2601 transitions. [2020-09-24 19:37:13,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:37:13,097 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 456 [2020-09-24 19:37:13,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:37:13,132 INFO L225 Difference]: With dead ends: 2019 [2020-09-24 19:37:13,133 INFO L226 Difference]: Without dead ends: 1445 [2020-09-24 19:37:13,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:37:13,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2020-09-24 19:37:13,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1438. [2020-09-24 19:37:13,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1438 states. [2020-09-24 19:37:13,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 1723 transitions. [2020-09-24 19:37:13,283 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 1723 transitions. Word has length 456 [2020-09-24 19:37:13,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:37:13,285 INFO L479 AbstractCegarLoop]: Abstraction has 1438 states and 1723 transitions. [2020-09-24 19:37:13,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:37:13,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 1723 transitions. [2020-09-24 19:37:13,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-09-24 19:37:13,299 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:37:13,300 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] [2020-09-24 19:37:13,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:37:13,301 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:37:13,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:37:13,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1418962381, now seen corresponding path program 1 times [2020-09-24 19:37:13,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:37:13,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547090870] [2020-09-24 19:37:13,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:37:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:13,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:13,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:14,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:14,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:14,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:14,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-09-24 19:37:14,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:37:14,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1005 [2020-09-24 19:37:14,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:14,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:37:14,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 208 [2020-09-24 19:37:14,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 218 [2020-09-24 19:37:14,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 19:37:15,100 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-24 19:37:15,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:37:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:15,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:15,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:15,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-24 19:37:15,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:37:15,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-09-24 19:37:15,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:15,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:37:15,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:37:15,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:37:15,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-24 19:37:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:37:15,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547090870] [2020-09-24 19:37:15,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:37:15,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:37:15,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078888001] [2020-09-24 19:37:15,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:37:15,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:37:15,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:37:15,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:37:15,687 INFO L87 Difference]: Start difference. First operand 1438 states and 1723 transitions. Second operand 4 states. [2020-09-24 19:37:19,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:37:19,520 INFO L93 Difference]: Finished difference Result 2635 states and 3268 transitions. [2020-09-24 19:37:19,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:37:19,526 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 456 [2020-09-24 19:37:19,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:37:19,539 INFO L225 Difference]: With dead ends: 2635 [2020-09-24 19:37:19,539 INFO L226 Difference]: Without dead ends: 2144 [2020-09-24 19:37:19,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:37:19,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2020-09-24 19:37:19,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 2132. [2020-09-24 19:37:19,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2132 states. [2020-09-24 19:37:19,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 2619 transitions. [2020-09-24 19:37:19,618 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 2619 transitions. Word has length 456 [2020-09-24 19:37:19,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:37:19,619 INFO L479 AbstractCegarLoop]: Abstraction has 2132 states and 2619 transitions. [2020-09-24 19:37:19,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:37:19,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 2619 transitions. [2020-09-24 19:37:19,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-09-24 19:37:19,630 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:37:19,631 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] [2020-09-24 19:37:19,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:37:19,632 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:37:19,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:37:19,632 INFO L82 PathProgramCache]: Analyzing trace with hash 496290573, now seen corresponding path program 1 times [2020-09-24 19:37:19,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:37:19,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782377168] [2020-09-24 19:37:19,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:37:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:19,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:20,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:20,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:20,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:20,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:20,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:20,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 463 [2020-09-24 19:37:20,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:37:20,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-09-24 19:37:20,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:20,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:37:20,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 177 [2020-09-24 19:37:20,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-09-24 19:37:20,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:37:21,350 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-24 19:37:21,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:37:21,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:21,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:21,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:21,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-24 19:37:21,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:37:21,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-09-24 19:37:21,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:21,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:37:21,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:37:21,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:37:21,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:37:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:37:21,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782377168] [2020-09-24 19:37:21,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:37:21,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:37:21,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875755090] [2020-09-24 19:37:21,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:37:21,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:37:21,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:37:21,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:37:21,875 INFO L87 Difference]: Start difference. First operand 2132 states and 2619 transitions. Second operand 5 states. [2020-09-24 19:37:28,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:37:28,772 INFO L93 Difference]: Finished difference Result 5778 states and 7159 transitions. [2020-09-24 19:37:28,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 19:37:28,777 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 456 [2020-09-24 19:37:28,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:37:28,796 INFO L225 Difference]: With dead ends: 5778 [2020-09-24 19:37:28,796 INFO L226 Difference]: Without dead ends: 3949 [2020-09-24 19:37:28,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:37:28,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3949 states. [2020-09-24 19:37:28,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3949 to 3840. [2020-09-24 19:37:28,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3840 states. [2020-09-24 19:37:28,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3840 states to 3840 states and 4751 transitions. [2020-09-24 19:37:28,941 INFO L78 Accepts]: Start accepts. Automaton has 3840 states and 4751 transitions. Word has length 456 [2020-09-24 19:37:28,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:37:28,942 INFO L479 AbstractCegarLoop]: Abstraction has 3840 states and 4751 transitions. [2020-09-24 19:37:28,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:37:28,943 INFO L276 IsEmpty]: Start isEmpty. Operand 3840 states and 4751 transitions. [2020-09-24 19:37:28,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2020-09-24 19:37:28,951 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:37:28,951 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] [2020-09-24 19:37:28,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 19:37:28,952 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:37:28,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:37:28,953 INFO L82 PathProgramCache]: Analyzing trace with hash 2086588959, now seen corresponding path program 1 times [2020-09-24 19:37:28,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:37:28,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88050874] [2020-09-24 19:37:28,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:37:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:29,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:29,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:29,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:29,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:29,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:29,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:30,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:30,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 464 [2020-09-24 19:37:30,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:37:30,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1054 [2020-09-24 19:37:30,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:30,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:37:30,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 186 [2020-09-24 19:37:30,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 19:37:30,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:37:30,549 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-24 19:37:30,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:37:30,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:30,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:30,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:30,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-24 19:37:30,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:37:30,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-09-24 19:37:30,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:30,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:37:30,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:37:30,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:37:30,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:37:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:37:30,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88050874] [2020-09-24 19:37:30,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:37:30,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:37:30,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695829929] [2020-09-24 19:37:30,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:37:30,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:37:30,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:37:30,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:37:30,995 INFO L87 Difference]: Start difference. First operand 3840 states and 4751 transitions. Second operand 4 states. [2020-09-24 19:37:37,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:37:37,380 INFO L93 Difference]: Finished difference Result 11097 states and 13800 transitions. [2020-09-24 19:37:37,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:37:37,380 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 457 [2020-09-24 19:37:37,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:37:37,412 INFO L225 Difference]: With dead ends: 11097 [2020-09-24 19:37:37,412 INFO L226 Difference]: Without dead ends: 7471 [2020-09-24 19:37:37,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:37:37,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7471 states. [2020-09-24 19:37:37,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7471 to 3846. [2020-09-24 19:37:37,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3846 states. [2020-09-24 19:37:37,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3846 states to 3846 states and 4759 transitions. [2020-09-24 19:37:37,587 INFO L78 Accepts]: Start accepts. Automaton has 3846 states and 4759 transitions. Word has length 457 [2020-09-24 19:37:37,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:37:37,588 INFO L479 AbstractCegarLoop]: Abstraction has 3846 states and 4759 transitions. [2020-09-24 19:37:37,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:37:37,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3846 states and 4759 transitions. [2020-09-24 19:37:37,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-09-24 19:37:37,633 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:37:37,633 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] [2020-09-24 19:37:37,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 19:37:37,634 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:37:37,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:37:37,634 INFO L82 PathProgramCache]: Analyzing trace with hash -2040039379, now seen corresponding path program 1 times [2020-09-24 19:37:37,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:37:37,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24152431] [2020-09-24 19:37:37,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:37:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:37,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:38,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:38,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:38,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:38,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:38,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 465 [2020-09-24 19:37:38,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:37:38,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1052 [2020-09-24 19:37:38,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:38,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:37:38,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-09-24 19:37:38,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 19:37:38,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:37:39,319 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-24 19:37:39,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:37:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:39,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:39,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:39,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-24 19:37:39,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:37:39,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-09-24 19:37:39,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:39,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:37:39,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:37:39,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:37:39,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:37:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:37:39,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24152431] [2020-09-24 19:37:39,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:37:39,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:37:39,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845356303] [2020-09-24 19:37:39,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:37:39,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:37:39,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:37:39,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:37:39,854 INFO L87 Difference]: Start difference. First operand 3846 states and 4759 transitions. Second operand 5 states. [2020-09-24 19:37:47,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:37:47,331 INFO L93 Difference]: Finished difference Result 10865 states and 13484 transitions. [2020-09-24 19:37:47,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 19:37:47,331 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 458 [2020-09-24 19:37:47,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:37:47,365 INFO L225 Difference]: With dead ends: 10865 [2020-09-24 19:37:47,366 INFO L226 Difference]: Without dead ends: 7271 [2020-09-24 19:37:47,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:37:47,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7271 states. [2020-09-24 19:37:47,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7271 to 7123. [2020-09-24 19:37:47,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7123 states. [2020-09-24 19:37:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7123 states to 7123 states and 8818 transitions. [2020-09-24 19:37:47,685 INFO L78 Accepts]: Start accepts. Automaton has 7123 states and 8818 transitions. Word has length 458 [2020-09-24 19:37:47,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:37:47,686 INFO L479 AbstractCegarLoop]: Abstraction has 7123 states and 8818 transitions. [2020-09-24 19:37:47,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:37:47,686 INFO L276 IsEmpty]: Start isEmpty. Operand 7123 states and 8818 transitions. [2020-09-24 19:37:47,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2020-09-24 19:37:47,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:37:47,699 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] [2020-09-24 19:37:47,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 19:37:47,700 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:37:47,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:37:47,700 INFO L82 PathProgramCache]: Analyzing trace with hash -245366285, now seen corresponding path program 1 times [2020-09-24 19:37:47,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:37:47,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239237188] [2020-09-24 19:37:47,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:37:47,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:47,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:47,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:48,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:48,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:48,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:48,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 466 [2020-09-24 19:37:48,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:37:48,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1012 [2020-09-24 19:37:48,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:48,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:37:48,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 181 [2020-09-24 19:37:48,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 19:37:48,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:37:49,101 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-09-24 19:37:49,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:37:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:49,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:49,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:49,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-24 19:37:49,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:37:49,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-24 19:37:49,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:49,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:37:49,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:37:49,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:37:49,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:37:49,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:37:49,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239237188] [2020-09-24 19:37:49,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:37:49,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:37:49,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045555241] [2020-09-24 19:37:49,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:37:49,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:37:49,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:37:49,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:37:49,393 INFO L87 Difference]: Start difference. First operand 7123 states and 8818 transitions. Second operand 4 states.