/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=LOWLEXORDER --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+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:54:03,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:54:03,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:54:03,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:54:03,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:54:03,367 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:54:03,369 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:54:03,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:54:03,375 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:54:03,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:54:03,379 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:54:03,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:54:03,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:54:03,383 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:54:03,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:54:03,387 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:54:03,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:54:03,390 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:54:03,392 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:54:03,400 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:54:03,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:54:03,403 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:54:03,404 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:54:03,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:54:03,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:54:03,418 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:54:03,418 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:54:03,420 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:54:03,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:54:03,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:54:03,428 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:54:03,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:54:03,432 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:54:03,433 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:54:03,435 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:54:03,435 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:54:03,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:54:03,436 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:54:03,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:54:03,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:54:03,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:54:03,441 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 21:54:03,486 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:54:03,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:54:03,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:54:03,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:54:03,489 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:54:03,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:54:03,490 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:54:03,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:54:03,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:54:03,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:54:03,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:54:03,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:54:03,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:54:03,492 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:54:03,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:54:03,492 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:54:03,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:54:03,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:54:03,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:54:03,493 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:54:03,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:54:03,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:54:03,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:54:03,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:54:03,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:54:03,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:54:03,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:54:03,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:54:03,495 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:54:03,495 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:54:03,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:54:04,010 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:54:04,017 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:54:04,020 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:54:04,020 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:54:04,021 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 21:54:04,109 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01b7e64a1/84fea351ff5a410ebb2bd07c199402db/FLAGfadab43b0 [2020-09-24 21:54:04,755 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:54:04,756 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 21:54:04,772 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01b7e64a1/84fea351ff5a410ebb2bd07c199402db/FLAGfadab43b0 [2020-09-24 21:54:04,979 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01b7e64a1/84fea351ff5a410ebb2bd07c199402db [2020-09-24 21:54:04,994 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:54:05,002 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:54:05,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:54:05,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:54:05,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:54:05,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:54:04" (1/1) ... [2020-09-24 21:54:05,016 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 09:54:05, skipping insertion in model container [2020-09-24 21:54:05,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:54:04" (1/1) ... [2020-09-24 21:54:05,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:54:05,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:54:05,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:54:05,748 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:54:05,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:54:05,934 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:54:05,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:54:05 WrapperNode [2020-09-24 21:54:05,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:54:05,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:54:05,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:54:05,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:54:05,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:54:05" (1/1) ... [2020-09-24 21:54:05,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:54:05" (1/1) ... [2020-09-24 21:54:05,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:54:05" (1/1) ... [2020-09-24 21:54:05,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:54:05" (1/1) ... [2020-09-24 21:54:05,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:54:05" (1/1) ... [2020-09-24 21:54:06,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:54:05" (1/1) ... [2020-09-24 21:54:06,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:54:05" (1/1) ... [2020-09-24 21:54:06,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:54:06,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:54:06,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:54:06,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:54:06,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:54:05" (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 21:54:06,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:54:06,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:54:06,130 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 21:54:06,130 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:54:06,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:54:06,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 21:54:06,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-24 21:54:06,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 21:54:06,132 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 21:54:06,133 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 21:54:06,133 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 21:54:06,133 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 21:54:06,133 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 21:54:06,133 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 21:54:06,134 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 21:54:06,134 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 21:54:06,135 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 21:54:06,135 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 21:54:06,135 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:54:06,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:54:06,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:54:07,808 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:54:07,808 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 21:54:07,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:54:07 BoogieIcfgContainer [2020-09-24 21:54:07,826 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:54:07,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:54:07,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:54:07,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:54:07,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:54:04" (1/3) ... [2020-09-24 21:54:07,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ce3ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:54:07, skipping insertion in model container [2020-09-24 21:54:07,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:54:05" (2/3) ... [2020-09-24 21:54:07,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ce3ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:54:07, skipping insertion in model container [2020-09-24 21:54:07,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:54:07" (3/3) ... [2020-09-24 21:54:07,844 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 21:54:07,855 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:54:07,872 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:54:07,894 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:54:07,930 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:54:07,931 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:54:07,931 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:54:07,931 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:54:07,931 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:54:07,931 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:54:07,931 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:54:07,931 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:54:07,969 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states. [2020-09-24 21:54:08,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-24 21:54:08,004 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:54:08,006 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] [2020-09-24 21:54:08,006 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:54:08,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:54:08,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1632941541, now seen corresponding path program 1 times [2020-09-24 21:54:08,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:54:08,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664583735] [2020-09-24 21:54:08,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:54:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:54:08,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:09,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:09,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:09,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:09,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:10,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:10,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:12,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:13,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:13,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:54:13,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-24 21:54:13,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:54:13,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-24 21:54:13,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:54:13,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:54:13,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 167 [2020-09-24 21:54:13,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-09-24 21:54:13,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:54:14,382 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-24 21:54:14,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:54:14,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:54:14,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:14,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:54:14,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 21:54:14,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:54:14,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-09-24 21:54:14,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:54:14,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:54:14,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:54:14,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:54:14,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:54:14,871 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 21:54:14,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664583735] [2020-09-24 21:54:14,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:54:14,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:54:14,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146944693] [2020-09-24 21:54:14,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:54:14,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:54:14,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:54:14,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:54:14,906 INFO L87 Difference]: Start difference. First operand 903 states. Second operand 5 states. [2020-09-24 21:54:20,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:54:20,042 INFO L93 Difference]: Finished difference Result 2312 states and 3055 transitions. [2020-09-24 21:54:20,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 21:54:20,044 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 449 [2020-09-24 21:54:20,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:54:20,078 INFO L225 Difference]: With dead ends: 2312 [2020-09-24 21:54:20,078 INFO L226 Difference]: Without dead ends: 1395 [2020-09-24 21:54:20,087 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 21:54:20,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2020-09-24 21:54:20,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1393. [2020-09-24 21:54:20,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1393 states. [2020-09-24 21:54:20,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 1694 transitions. [2020-09-24 21:54:20,222 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 1694 transitions. Word has length 449 [2020-09-24 21:54:20,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:54:20,223 INFO L479 AbstractCegarLoop]: Abstraction has 1393 states and 1694 transitions. [2020-09-24 21:54:20,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:54:20,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 1694 transitions. [2020-09-24 21:54:20,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-09-24 21:54:20,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:54:20,237 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] [2020-09-24 21:54:20,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:54:20,238 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:54:20,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:54:20,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1633102700, now seen corresponding path program 1 times [2020-09-24 21:54:20,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:54:20,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201931418] [2020-09-24 21:54:20,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:54:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:54:20,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:20,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:20,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:20,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:20,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:21,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:22,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:24,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:25,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:25,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:25,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:54:25,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 457 [2020-09-24 21:54:25,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:54:25,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-09-24 21:54:25,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:54:25,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:54:25,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 169 [2020-09-24 21:54:25,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-09-24 21:54:25,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-24 21:54:25,837 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-24 21:54:25,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:54:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:54:25,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:25,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:54:25,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 21:54:25,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:54:25,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-24 21:54:25,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:54:25,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:54:25,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:54:25,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:54:25,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:54:26,461 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 21:54:26,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201931418] [2020-09-24 21:54:26,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:54:26,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:54:26,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774222055] [2020-09-24 21:54:26,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:54:26,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:54:26,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:54:26,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:54:26,469 INFO L87 Difference]: Start difference. First operand 1393 states and 1694 transitions. Second operand 5 states. [2020-09-24 21:54:31,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:54:31,663 INFO L93 Difference]: Finished difference Result 3665 states and 4504 transitions. [2020-09-24 21:54:31,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 21:54:31,664 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 450 [2020-09-24 21:54:31,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:54:31,676 INFO L225 Difference]: With dead ends: 3665 [2020-09-24 21:54:31,676 INFO L226 Difference]: Without dead ends: 2503 [2020-09-24 21:54:31,680 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 21:54:31,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2020-09-24 21:54:31,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 2501. [2020-09-24 21:54:31,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2501 states. [2020-09-24 21:54:31,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 3051 transitions. [2020-09-24 21:54:31,785 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 3051 transitions. Word has length 450 [2020-09-24 21:54:31,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:54:31,786 INFO L479 AbstractCegarLoop]: Abstraction has 2501 states and 3051 transitions. [2020-09-24 21:54:31,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:54:31,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 3051 transitions. [2020-09-24 21:54:31,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2020-09-24 21:54:31,794 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:54:31,795 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] [2020-09-24 21:54:31,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:54:31,795 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:54:31,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:54:31,796 INFO L82 PathProgramCache]: Analyzing trace with hash 847367281, now seen corresponding path program 1 times [2020-09-24 21:54:31,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:54:31,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879225474] [2020-09-24 21:54:31,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:54:31,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:54:32,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:32,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:32,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:32,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:32,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:32,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:34,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:34,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:36,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:54:36,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 458 [2020-09-24 21:54:36,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:54:36,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-24 21:54:36,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:54:36,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:54:36,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 168 [2020-09-24 21:54:36,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:54:36,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:54:37,420 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-24 21:54:37,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:54:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:54:37,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:37,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:54:37,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 21:54:37,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:54:37,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-24 21:54:37,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:54:37,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:54:37,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:54:37,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:54:37,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:54:37,782 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 21:54:37,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879225474] [2020-09-24 21:54:37,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:54:37,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:54:37,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819746478] [2020-09-24 21:54:37,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:54:37,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:54:37,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:54:37,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:54:37,786 INFO L87 Difference]: Start difference. First operand 2501 states and 3051 transitions. Second operand 5 states. [2020-09-24 21:54:42,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:54:42,373 INFO L93 Difference]: Finished difference Result 6807 states and 8359 transitions. [2020-09-24 21:54:42,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 21:54:42,374 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 451 [2020-09-24 21:54:42,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:54:42,394 INFO L225 Difference]: With dead ends: 6807 [2020-09-24 21:54:42,394 INFO L226 Difference]: Without dead ends: 4676 [2020-09-24 21:54:42,399 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 21:54:42,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4676 states. [2020-09-24 21:54:42,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4676 to 4674. [2020-09-24 21:54:42,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4674 states. [2020-09-24 21:54:42,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4674 states to 4674 states and 5697 transitions. [2020-09-24 21:54:42,586 INFO L78 Accepts]: Start accepts. Automaton has 4674 states and 5697 transitions. Word has length 451 [2020-09-24 21:54:42,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:54:42,587 INFO L479 AbstractCegarLoop]: Abstraction has 4674 states and 5697 transitions. [2020-09-24 21:54:42,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:54:42,587 INFO L276 IsEmpty]: Start isEmpty. Operand 4674 states and 5697 transitions. [2020-09-24 21:54:42,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2020-09-24 21:54:42,596 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:54:42,597 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] [2020-09-24 21:54:42,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:54:42,597 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:54:42,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:54:42,598 INFO L82 PathProgramCache]: Analyzing trace with hash 955965826, now seen corresponding path program 1 times [2020-09-24 21:54:42,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:54:42,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600401424] [2020-09-24 21:54:42,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:54:42,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:54:42,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:42,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:42,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:43,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:43,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:43,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:44,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:44,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:47,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:47,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:47,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:47,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:54:47,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 459 [2020-09-24 21:54:47,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 21:54:47,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-09-24 21:54:47,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:54:47,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:54:47,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 170 [2020-09-24 21:54:47,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-09-24 21:54:47,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:54:48,134 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-24 21:54:48,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:54:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:54:48,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:54:48,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:54:48,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 21:54:48,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:54:48,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-24 21:54:48,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:54:48,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:54:48,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:54:48,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:54:48,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:54:48,375 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 21:54:48,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600401424] [2020-09-24 21:54:48,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:54:48,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:54:48,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502659885] [2020-09-24 21:54:48,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:54:48,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:54:48,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:54:48,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:54:48,378 INFO L87 Difference]: Start difference. First operand 4674 states and 5697 transitions. Second operand 5 states.