/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 SequenceOfStatements --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 --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/max05-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 18:27:17,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 18:27:17,466 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 18:27:17,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 18:27:17,508 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 18:27:17,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 18:27:17,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 18:27:17,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 18:27:17,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 18:27:17,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 18:27:17,531 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 18:27:17,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 18:27:17,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 18:27:17,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 18:27:17,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 18:27:17,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 18:27:17,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 18:27:17,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 18:27:17,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 18:27:17,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 18:27:17,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 18:27:17,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 18:27:17,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 18:27:17,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 18:27:17,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 18:27:17,565 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 18:27:17,565 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 18:27:17,566 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 18:27:17,568 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 18:27:17,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 18:27:17,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 18:27:17,570 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 18:27:17,571 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 18:27:17,572 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 18:27:17,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 18:27:17,574 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 18:27:17,574 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 18:27:17,574 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 18:27:17,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 18:27:17,575 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 18:27:17,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 18:27:17,578 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 [2020-10-12 18:27:17,618 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 18:27:17,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 18:27:17,621 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 18:27:17,621 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 18:27:17,621 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 18:27:17,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 18:27:17,622 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 18:27:17,622 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 18:27:17,622 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 18:27:17,622 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 18:27:17,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 18:27:17,623 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 18:27:17,623 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 18:27:17,624 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 18:27:17,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 18:27:17,624 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 18:27:17,625 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 18:27:17,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 18:27:17,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 18:27:17,625 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 18:27:17,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 18:27:17,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 18:27:17,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 18:27:17,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 18:27:17,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 18:27:17,626 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 18:27:17,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 18:27:17,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 18:27:17,627 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 18:27:17,627 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 -> SequenceOfStatements 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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=true; [2020-10-12 18:27:17,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 18:27:17,958 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 18:27:17,962 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 18:27:17,964 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 18:27:17,964 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 18:27:17,965 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/max05-1.i [2020-10-12 18:27:18,046 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c94e4951/3a7cea3d90bf47d69c3d4014c164a350/FLAGfbd8ee456 [2020-10-12 18:27:18,519 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 18:27:18,519 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/reducercommutativity/max05-1.i [2020-10-12 18:27:18,526 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c94e4951/3a7cea3d90bf47d69c3d4014c164a350/FLAGfbd8ee456 [2020-10-12 18:27:18,930 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c94e4951/3a7cea3d90bf47d69c3d4014c164a350 [2020-10-12 18:27:18,941 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 18:27:18,943 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 18:27:18,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 18:27:18,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 18:27:18,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 18:27:18,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:27:18" (1/1) ... [2020-10-12 18:27:18,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@337988d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:27:18, skipping insertion in model container [2020-10-12 18:27:18,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 06:27:18" (1/1) ... [2020-10-12 18:27:18,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 18:27:18,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 18:27:19,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 18:27:19,213 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 18:27:19,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 18:27:19,252 INFO L208 MainTranslator]: Completed translation [2020-10-12 18:27:19,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:27:19 WrapperNode [2020-10-12 18:27:19,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 18:27:19,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 18:27:19,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 18:27:19,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 18:27:19,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:27:19" (1/1) ... [2020-10-12 18:27:19,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:27:19" (1/1) ... [2020-10-12 18:27:19,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:27:19" (1/1) ... [2020-10-12 18:27:19,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:27:19" (1/1) ... [2020-10-12 18:27:19,370 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:27:19" (1/1) ... [2020-10-12 18:27:19,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:27:19" (1/1) ... [2020-10-12 18:27:19,377 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:27:19" (1/1) ... [2020-10-12 18:27:19,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 18:27:19,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 18:27:19,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 18:27:19,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 18:27:19,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:27:19" (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 [2020-10-12 18:27:19,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 18:27:19,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 18:27:19,446 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2020-10-12 18:27:19,446 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 18:27:19,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 18:27:19,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 18:27:19,446 INFO L130 BoogieDeclarations]: Found specification of procedure max [2020-10-12 18:27:19,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 18:27:19,447 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 18:27:19,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 18:27:19,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 18:27:19,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 18:27:19,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 18:27:19,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 18:27:19,712 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 18:27:19,713 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-12 18:27:19,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:27:19 BoogieIcfgContainer [2020-10-12 18:27:19,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 18:27:19,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 18:27:19,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 18:27:19,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 18:27:19,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 06:27:18" (1/3) ... [2020-10-12 18:27:19,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1162160b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:27:19, skipping insertion in model container [2020-10-12 18:27:19,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 06:27:19" (2/3) ... [2020-10-12 18:27:19,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1162160b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 06:27:19, skipping insertion in model container [2020-10-12 18:27:19,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 06:27:19" (3/3) ... [2020-10-12 18:27:19,729 INFO L109 eAbstractionObserver]: Analyzing ICFG max05-1.i [2020-10-12 18:27:19,743 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 18:27:19,752 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 18:27:19,770 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 18:27:19,800 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 18:27:19,800 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 18:27:19,800 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 18:27:19,801 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 18:27:19,801 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 18:27:19,801 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 18:27:19,801 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 18:27:19,802 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 18:27:19,823 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-12 18:27:19,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 18:27:19,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:27:19,837 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:27:19,838 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:27:19,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:27:19,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1379671032, now seen corresponding path program 1 times [2020-10-12 18:27:19,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:27:19,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941260864] [2020-10-12 18:27:19,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:27:19,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:27:20,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:20,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:20,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:20,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:20,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:20,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:21,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:27:21,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 18:27:21,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 18:27:21,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1274 [2020-10-12 18:27:21,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:27:21,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 18:27:21,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 18:27:21,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 18:27:21,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 18:27:21,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:27:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:27:21,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:21,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:27:21,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:27:21,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:27:21,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 18:27:21,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:27:21,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:27:21,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:27:21,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:27:21,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:27:21,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 18:27:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:27:21,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:21,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:21,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:27:21,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 18:27:21,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:27:21,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-12 18:27:21,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:27:21,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 18:27:21,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:27:21,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 18:27:21,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:27:21,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-12 18:27:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:27:21,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:21,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:21,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:27:21,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 18:27:21,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:27:21,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-12 18:27:21,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:27:21,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 18:27:21,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:27:21,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 18:27:21,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:27:21,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 18:27:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:27:21,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:21,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:21,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:27:21,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 18:27:21,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:27:21,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-12 18:27:21,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:27:21,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 18:27:21,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:27:21,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 18:27:21,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:27:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-12 18:27:21,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941260864] [2020-10-12 18:27:21,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 18:27:21,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 18:27:21,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636084020] [2020-10-12 18:27:21,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 18:27:21,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:27:21,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 18:27:21,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 18:27:21,875 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 11 states. [2020-10-12 18:27:22,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:27:22,352 INFO L93 Difference]: Finished difference Result 89 states and 129 transitions. [2020-10-12 18:27:22,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 18:27:22,355 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-12 18:27:22,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:27:22,366 INFO L225 Difference]: With dead ends: 89 [2020-10-12 18:27:22,366 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 18:27:22,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-12 18:27:22,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 18:27:22,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2020-10-12 18:27:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 18:27:22,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2020-10-12 18:27:22,427 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 32 [2020-10-12 18:27:22,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:27:22,428 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2020-10-12 18:27:22,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 18:27:22,428 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2020-10-12 18:27:22,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 18:27:22,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:27:22,431 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:27:22,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 18:27:22,432 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:27:22,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:27:22,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1328588870, now seen corresponding path program 1 times [2020-10-12 18:27:22,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:27:22,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681066418] [2020-10-12 18:27:22,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:27:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:27:22,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:22,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:22,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:22,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:22,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:23,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:27:23,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 18:27:23,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 18:27:23,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1052 [2020-10-12 18:27:23,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:27:23,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 18:27:23,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 18:27:23,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 18:27:23,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:27:23,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:27:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:27:23,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:23,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:27:23,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:27:23,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:27:23,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 18:27:23,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:27:23,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:27:23,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:27:23,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:27:23,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:27:23,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 18:27:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:27:23,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:23,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:23,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:27:23,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 18:27:23,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:27:23,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 18:27:23,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:27:23,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 18:27:23,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 18:27:23,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 18:27:23,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:27:23,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-12 18:27:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:27:23,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:23,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:23,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:27:23,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-12 18:27:23,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:27:23,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 18:27:23,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:27:23,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 18:27:23,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 18:27:23,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 18:27:23,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:27:23,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 18:27:23,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:27:23,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:23,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:27:23,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-12 18:27:23,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:27:23,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 18:27:23,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:27:23,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 18:27:23,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 18:27:23,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 18:27:23,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:27:23,618 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-12 18:27:23,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681066418] [2020-10-12 18:27:23,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:27:23,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 18:27:23,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623001525] [2020-10-12 18:27:23,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 18:27:23,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:27:23,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 18:27:23,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 18:27:23,627 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand 5 states. [2020-10-12 18:27:23,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:27:23,757 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2020-10-12 18:27:23,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 18:27:23,757 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-10-12 18:27:23,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:27:23,759 INFO L225 Difference]: With dead ends: 66 [2020-10-12 18:27:23,759 INFO L226 Difference]: Without dead ends: 36 [2020-10-12 18:27:23,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-12 18:27:23,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-12 18:27:23,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-12 18:27:23,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 18:27:23,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-12 18:27:23,786 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 36 [2020-10-12 18:27:23,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:27:23,787 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-12 18:27:23,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 18:27:23,787 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-12 18:27:23,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 18:27:23,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:27:23,791 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:27:23,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 18:27:23,792 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:27:23,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:27:23,793 INFO L82 PathProgramCache]: Analyzing trace with hash 981704641, now seen corresponding path program 2 times [2020-10-12 18:27:23,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:27:23,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722083402] [2020-10-12 18:27:23,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:27:23,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:27:23,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:23,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:23,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:23,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:23,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:26,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:26,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:27,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:28,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:27:28,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 18:27:28,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 18:27:28,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 18:27:28,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:27:28,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 18:27:28,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 18:27:28,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 18:27:28,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-12 18:27:28,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 18:27:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:27:28,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:28,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:27:28,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 18:27:28,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 18:27:28,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 18:27:28,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:27:28,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 18:27:28,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:27:28,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 18:27:28,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:27:28,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 18:27:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:27:28,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:28,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:29,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:27:29,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 18:27:29,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:27:29,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-12 18:27:29,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:27:29,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 18:27:29,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 18:27:29,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 18:27:29,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 18:27:29,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 18:27:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:27:29,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:29,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:29,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:29,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:27:29,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 18:27:29,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 18:27:29,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-12 18:27:29,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:27:29,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 18:27:29,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 18:27:29,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 18:27:29,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:27:29,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 18:27:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:27:29,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:29,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:29,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:27:29,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 18:27:29,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 18:27:29,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-12 18:27:29,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:27:29,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 18:27:29,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 18:27:29,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 18:27:29,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 18:27:29,818 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-12 18:27:29,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722083402] [2020-10-12 18:27:29,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 18:27:29,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 18:27:29,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899051307] [2020-10-12 18:27:29,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 18:27:29,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 18:27:29,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 18:27:29,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 18:27:29,821 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 11 states. [2020-10-12 18:27:30,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 18:27:30,537 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2020-10-12 18:27:30,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 18:27:30,538 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-12 18:27:30,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 18:27:30,540 INFO L225 Difference]: With dead ends: 96 [2020-10-12 18:27:30,540 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 18:27:30,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2020-10-12 18:27:30,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 18:27:30,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-10-12 18:27:30,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 18:27:30,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2020-10-12 18:27:30,555 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 56 [2020-10-12 18:27:30,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 18:27:30,556 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2020-10-12 18:27:30,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 18:27:30,556 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2020-10-12 18:27:30,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 18:27:30,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 18:27:30,560 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 18:27:30,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 18:27:30,561 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 18:27:30,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 18:27:30,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1783061631, now seen corresponding path program 1 times [2020-10-12 18:27:30,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 18:27:30,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706920244] [2020-10-12 18:27:30,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 18:27:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 18:27:30,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:30,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:30,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:30,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:31,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:34,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 18:27:35,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 18:27:35,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 18:27:35,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 18:27:35,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 18:27:35,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 18:27:35,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 18:27:35,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 18:27:35,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 18:27:35,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0