/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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:45:24,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:45:24,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:45:24,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:45:24,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:45:24,646 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:45:24,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:45:24,650 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:45:24,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:45:24,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:45:24,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:45:24,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:45:24,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:45:24,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:45:24,658 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:45:24,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:45:24,661 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:45:24,662 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:45:24,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:45:24,666 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:45:24,668 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:45:24,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:45:24,671 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:45:24,672 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:45:24,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:45:24,675 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:45:24,675 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:45:24,676 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:45:24,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:45:24,678 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:45:24,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:45:24,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:45:24,680 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:45:24,681 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:45:24,685 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:45:24,686 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:45:24,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:45:24,688 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:45:24,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:45:24,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:45:24,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:45:24,692 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 20:45:24,747 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:45:24,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:45:24,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:45:24,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:45:24,753 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:45:24,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:45:24,753 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:45:24,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:45:24,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:45:24,755 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:45:24,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:45:24,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:45:24,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:45:24,756 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:45:24,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:45:24,756 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:45:24,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:45:24,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:45:24,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:45:24,758 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:45:24,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:45:24,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:45:24,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:45:24,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:45:24,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:45:24,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:45:24,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:45:24,760 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:45:24,760 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:45:24,760 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true; [2020-09-24 20:45:25,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:45:25,266 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:45:25,271 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:45:25,273 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:45:25,274 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:45:25,275 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 20:45:25,366 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b94b4fb6/339575447e554bc6bc4352297c81aab6/FLAGf9c169ce1 [2020-09-24 20:45:26,116 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:45:26,117 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 20:45:26,140 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b94b4fb6/339575447e554bc6bc4352297c81aab6/FLAGf9c169ce1 [2020-09-24 20:45:26,241 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b94b4fb6/339575447e554bc6bc4352297c81aab6 [2020-09-24 20:45:26,257 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:45:26,265 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:45:26,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:45:26,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:45:26,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:45:26,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:45:26" (1/1) ... [2020-09-24 20:45:26,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ed7fd98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:26, skipping insertion in model container [2020-09-24 20:45:26,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:45:26" (1/1) ... [2020-09-24 20:45:26,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:45:26,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:45:27,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:45:27,794 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:45:28,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:45:28,278 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:45:28,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:28 WrapperNode [2020-09-24 20:45:28,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:45:28,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:45:28,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:45:28,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:45:28,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:28" (1/1) ... [2020-09-24 20:45:28,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:28" (1/1) ... [2020-09-24 20:45:28,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:28" (1/1) ... [2020-09-24 20:45:28,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:28" (1/1) ... [2020-09-24 20:45:28,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:28" (1/1) ... [2020-09-24 20:45:28,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:28" (1/1) ... [2020-09-24 20:45:28,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:28" (1/1) ... [2020-09-24 20:45:28,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:45:28,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:45:28,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:45:28,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:45:28,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:28" (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 20:45:28,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:45:28,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:45:28,579 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 20:45:28,579 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:45:28,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:45:28,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 20:45:28,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-24 20:45:28,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 20:45:28,581 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 20:45:28,581 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 20:45:28,581 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 20:45:28,581 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 20:45:28,582 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 20:45:28,582 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 20:45:28,582 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 20:45:28,582 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 20:45:28,583 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-24 20:45:28,583 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 20:45:28,583 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 20:45:28,584 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:45:28,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:45:28,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:45:31,904 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:45:31,904 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 20:45:31,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:45:31 BoogieIcfgContainer [2020-09-24 20:45:31,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:45:31,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:45:31,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:45:31,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:45:31,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:45:26" (1/3) ... [2020-09-24 20:45:31,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409ae791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:45:31, skipping insertion in model container [2020-09-24 20:45:31,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:28" (2/3) ... [2020-09-24 20:45:31,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409ae791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:45:31, skipping insertion in model container [2020-09-24 20:45:31,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:45:31" (3/3) ... [2020-09-24 20:45:31,932 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 20:45:31,947 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:45:31,968 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:45:31,991 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:45:32,039 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:45:32,039 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:45:32,039 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:45:32,039 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:45:32,040 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:45:32,040 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:45:32,040 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:45:32,040 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:45:32,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states. [2020-09-24 20:45:32,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 909 [2020-09-24 20:45:32,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:45:32,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:45:32,215 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:45:32,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:45:32,225 INFO L82 PathProgramCache]: Analyzing trace with hash -2948384, now seen corresponding path program 1 times [2020-09-24 20:45:32,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:45:32,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666420175] [2020-09-24 20:45:32,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:45:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:45:34,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:35,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:35,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:36,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:36,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:37,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:37,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:37,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:38,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:45:38,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 915 [2020-09-24 20:45:38,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 20:45:38,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-09-24 20:45:38,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:45:38,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:45:38,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 277 [2020-09-24 20:45:38,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-09-24 20:45:38,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 20:45:39,818 WARN L193 SmtUtils]: Spent 809.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-24 20:45:39,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:45:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:45:39,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:39,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:45:39,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-24 20:45:39,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:45:39,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-09-24 20:45:39,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:45:39,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:45:39,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:45:39,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:45:39,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:45:41,214 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 20:45:41,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666420175] [2020-09-24 20:45:41,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:45:41,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:45:41,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345076665] [2020-09-24 20:45:41,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:45:41,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:45:41,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:45:41,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:45:41,251 INFO L87 Difference]: Start difference. First operand 1994 states. Second operand 5 states. [2020-09-24 20:45:56,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:45:56,232 INFO L93 Difference]: Finished difference Result 5334 states and 7139 transitions. [2020-09-24 20:45:56,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 20:45:56,235 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 908 [2020-09-24 20:45:56,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:45:56,297 INFO L225 Difference]: With dead ends: 5334 [2020-09-24 20:45:56,297 INFO L226 Difference]: Without dead ends: 3308 [2020-09-24 20:45:56,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:45:56,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3308 states. [2020-09-24 20:45:56,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3308 to 3306. [2020-09-24 20:45:56,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3306 states. [2020-09-24 20:45:56,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3306 states to 3306 states and 4172 transitions. [2020-09-24 20:45:56,528 INFO L78 Accepts]: Start accepts. Automaton has 3306 states and 4172 transitions. Word has length 908 [2020-09-24 20:45:56,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:45:56,534 INFO L479 AbstractCegarLoop]: Abstraction has 3306 states and 4172 transitions. [2020-09-24 20:45:56,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 20:45:56,534 INFO L276 IsEmpty]: Start isEmpty. Operand 3306 states and 4172 transitions. [2020-09-24 20:45:56,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 911 [2020-09-24 20:45:56,578 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:45:56,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:45:56,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:45:56,579 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:45:56,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:45:56,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1010335363, now seen corresponding path program 1 times [2020-09-24 20:45:56,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:45:56,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023829772] [2020-09-24 20:45:56,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:45:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:45:57,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:57,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:57,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:58,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:58,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:58,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:58,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:59,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:00,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:01,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:01,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:46:01,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 917 [2020-09-24 20:46:01,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 20:46:01,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-09-24 20:46:01,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:46:01,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:46:01,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 279 [2020-09-24 20:46:01,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-09-24 20:46:01,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-24 20:46:02,984 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-24 20:46:02,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:46:03,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:46:03,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:03,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:46:03,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-24 20:46:03,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:46:03,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-09-24 20:46:03,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:46:03,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:46:03,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:46:03,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:46:03,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:46:04,672 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 20:46:04,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023829772] [2020-09-24 20:46:04,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:46:04,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:46:04,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278925018] [2020-09-24 20:46:04,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:46:04,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:46:04,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:46:04,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:46:04,679 INFO L87 Difference]: Start difference. First operand 3306 states and 4172 transitions. Second operand 5 states.