/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:49:59,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:49:59,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:49:59,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:49:59,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:49:59,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:49:59,458 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:49:59,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:49:59,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:49:59,469 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:49:59,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:49:59,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:49:59,473 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:49:59,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:49:59,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:49:59,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:49:59,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:49:59,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:49:59,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:49:59,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:49:59,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:49:59,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:49:59,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:49:59,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:49:59,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:49:59,513 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:49:59,513 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:49:59,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:49:59,517 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:49:59,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:49:59,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:49:59,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:49:59,524 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:49:59,525 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:49:59,527 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:49:59,527 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:49:59,528 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:49:59,528 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:49:59,529 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:49:59,530 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:49:59,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:49:59,533 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 21:49:59,586 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:49:59,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:49:59,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:49:59,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:49:59,590 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:49:59,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:49:59,590 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:49:59,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:49:59,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:49:59,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:49:59,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:49:59,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:49:59,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:49:59,593 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:49:59,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:49:59,593 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:49:59,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:49:59,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:49:59,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:49:59,594 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:49:59,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:49:59,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:49:59,594 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:49:59,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:49:59,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:49:59,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:49:59,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:49:59,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:49:59,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:49:59,599 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:50:00,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:50:00,068 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:50:00,073 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:50:00,075 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:50:00,075 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:50:00,077 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-09-24 21:50:00,156 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aafe174d2/f58e9109e1104060adaaf4e8e281212e/FLAG8e3faf6d6 [2020-09-24 21:50:00,650 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:50:00,650 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-09-24 21:50:00,657 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aafe174d2/f58e9109e1104060adaaf4e8e281212e/FLAG8e3faf6d6 [2020-09-24 21:50:01,000 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aafe174d2/f58e9109e1104060adaaf4e8e281212e [2020-09-24 21:50:01,014 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:50:01,021 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:50:01,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:50:01,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:50:01,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:50:01,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:50:01" (1/1) ... [2020-09-24 21:50:01,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b599924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:01, skipping insertion in model container [2020-09-24 21:50:01,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:50:01" (1/1) ... [2020-09-24 21:50:01,042 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:50:01,068 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:50:01,296 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:50:01,302 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:50:01,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:50:01,342 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:50:01,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:01 WrapperNode [2020-09-24 21:50:01,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:50:01,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:50:01,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:50:01,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:50:01,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:01" (1/1) ... [2020-09-24 21:50:01,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:01" (1/1) ... [2020-09-24 21:50:01,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:01" (1/1) ... [2020-09-24 21:50:01,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:01" (1/1) ... [2020-09-24 21:50:01,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:01" (1/1) ... [2020-09-24 21:50:01,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:01" (1/1) ... [2020-09-24 21:50:01,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:01" (1/1) ... [2020-09-24 21:50:01,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:50:01,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:50:01,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:50:01,478 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:50:01,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:01" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:50:01,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:50:01,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:50:01,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 21:50:01,558 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:50:01,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:50:01,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:50:01,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 21:50:01,559 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:50:01,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:50:01,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:50:01,767 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:50:01,767 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:50:01,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:50:01 BoogieIcfgContainer [2020-09-24 21:50:01,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:50:01,775 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:50:01,775 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:50:01,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:50:01,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:50:01" (1/3) ... [2020-09-24 21:50:01,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e9bfca4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:50:01, skipping insertion in model container [2020-09-24 21:50:01,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:01" (2/3) ... [2020-09-24 21:50:01,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e9bfca4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:50:01, skipping insertion in model container [2020-09-24 21:50:01,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:50:01" (3/3) ... [2020-09-24 21:50:01,790 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2020-09-24 21:50:01,808 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:50:01,821 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:50:01,850 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:50:01,887 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:50:01,887 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:50:01,888 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:50:01,888 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:50:01,888 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:50:01,888 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:50:01,888 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:50:01,888 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:50:01,914 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-24 21:50:01,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-24 21:50:01,923 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:01,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:01,925 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:01,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:01,934 INFO L82 PathProgramCache]: Analyzing trace with hash -290415040, now seen corresponding path program 1 times [2020-09-24 21:50:01,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:01,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335920685] [2020-09-24 21:50:01,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:02,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:02,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:02,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:02,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:02,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 21:50:02,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:02,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-09-24 21:50:02,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:02,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:50:02,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:50:02,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 21:50:02,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-24 21:50:02,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:02,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:02,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:02,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:02,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:02,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:50:02,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:02,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:02,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:02,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:02,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:02,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335920685] [2020-09-24 21:50:02,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:50:02,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:50:02,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141122732] [2020-09-24 21:50:02,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:50:02,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:02,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:50:02,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:50:02,446 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-09-24 21:50:02,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:02,554 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-09-24 21:50:02,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 21:50:02,556 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-24 21:50:02,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:02,568 INFO L225 Difference]: With dead ends: 47 [2020-09-24 21:50:02,569 INFO L226 Difference]: Without dead ends: 23 [2020-09-24 21:50:02,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:50:02,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-24 21:50:02,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-09-24 21:50:02,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-24 21:50:02,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-09-24 21:50:02,628 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 14 [2020-09-24 21:50:02,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:02,629 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-09-24 21:50:02,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:50:02,629 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-09-24 21:50:02,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-24 21:50:02,630 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:02,630 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] [2020-09-24 21:50:02,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:50:02,631 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:02,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:02,632 INFO L82 PathProgramCache]: Analyzing trace with hash -887516915, now seen corresponding path program 1 times [2020-09-24 21:50:02,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:02,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369474113] [2020-09-24 21:50:02,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:02,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:03,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:03,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-24 21:50:03,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:03,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 366 [2020-09-24 21:50:03,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:03,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:50:03,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:50:03,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 21:50:03,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:03,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:03,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:03,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:03,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:03,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:03,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:50:03,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:03,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:03,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:03,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:03,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:03,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369474113] [2020-09-24 21:50:03,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:03,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 21:50:03,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788772507] [2020-09-24 21:50:03,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 21:50:03,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:03,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 21:50:03,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:50:03,288 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2020-09-24 21:50:03,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:03,605 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-09-24 21:50:03,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 21:50:03,606 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-09-24 21:50:03,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:03,607 INFO L225 Difference]: With dead ends: 34 [2020-09-24 21:50:03,607 INFO L226 Difference]: Without dead ends: 29 [2020-09-24 21:50:03,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:50:03,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-24 21:50:03,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-09-24 21:50:03,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 21:50:03,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-09-24 21:50:03,617 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2020-09-24 21:50:03,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:03,617 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-09-24 21:50:03,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 21:50:03,618 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-09-24 21:50:03,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-24 21:50:03,619 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:03,619 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] [2020-09-24 21:50:03,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:50:03,619 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:03,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:03,620 INFO L82 PathProgramCache]: Analyzing trace with hash -507920327, now seen corresponding path program 1 times [2020-09-24 21:50:03,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:03,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922548633] [2020-09-24 21:50:03,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:03,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:03,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:03,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-24 21:50:03,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:03,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-24 21:50:03,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:03,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:50:03,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 21:50:03,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 21:50:03,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:03,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:03,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:03,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:03,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:03,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:03,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:50:03,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:03,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:03,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:03,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:03,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:03,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922548633] [2020-09-24 21:50:03,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:50:03,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 21:50:03,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487164460] [2020-09-24 21:50:03,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 21:50:03,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:03,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 21:50:03,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:50:03,701 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 3 states. [2020-09-24 21:50:03,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:03,726 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-09-24 21:50:03,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 21:50:03,727 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-24 21:50:03,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:03,728 INFO L225 Difference]: With dead ends: 40 [2020-09-24 21:50:03,728 INFO L226 Difference]: Without dead ends: 28 [2020-09-24 21:50:03,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:50:03,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-24 21:50:03,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-24 21:50:03,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 21:50:03,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-09-24 21:50:03,736 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2020-09-24 21:50:03,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:03,736 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-09-24 21:50:03,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 21:50:03,737 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-09-24 21:50:03,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 21:50:03,738 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:03,738 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:03,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:50:03,739 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:03,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:03,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1934159721, now seen corresponding path program 2 times [2020-09-24 21:50:03,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:03,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487623762] [2020-09-24 21:50:03,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:03,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:04,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:04,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 21:50:04,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:04,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-09-24 21:50:04,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:04,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 21:50:04,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:50:04,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:50:04,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:04,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:04,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:04,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:04,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:04,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:04,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:50:04,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:04,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:04,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:04,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:04,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:04,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:04,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487623762] [2020-09-24 21:50:04,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:04,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 21:50:04,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596400249] [2020-09-24 21:50:04,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 21:50:04,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:04,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 21:50:04,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-09-24 21:50:04,340 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-09-24 21:50:04,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:04,773 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-09-24 21:50:04,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 21:50:04,774 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-09-24 21:50:04,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:04,775 INFO L225 Difference]: With dead ends: 41 [2020-09-24 21:50:04,775 INFO L226 Difference]: Without dead ends: 36 [2020-09-24 21:50:04,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-24 21:50:04,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-24 21:50:04,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-09-24 21:50:04,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-24 21:50:04,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-09-24 21:50:04,783 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 26 [2020-09-24 21:50:04,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:04,783 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-09-24 21:50:04,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 21:50:04,784 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-09-24 21:50:04,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-24 21:50:04,785 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:04,785 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:04,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:50:04,785 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:04,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:04,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1064709469, now seen corresponding path program 1 times [2020-09-24 21:50:04,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:04,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442223888] [2020-09-24 21:50:04,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:04,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:04,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:04,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-24 21:50:04,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:04,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-09-24 21:50:04,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:04,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:50:04,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 21:50:04,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 21:50:04,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:04,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:04,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:04,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:04,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:04,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:04,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:50:04,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:04,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:04,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:04,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:04,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:04,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442223888] [2020-09-24 21:50:04,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:04,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 21:50:04,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31057706] [2020-09-24 21:50:04,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:50:04,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:04,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:50:04,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:50:04,951 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 5 states. [2020-09-24 21:50:05,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:05,010 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-09-24 21:50:05,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 21:50:05,011 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-09-24 21:50:05,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:05,013 INFO L225 Difference]: With dead ends: 46 [2020-09-24 21:50:05,014 INFO L226 Difference]: Without dead ends: 34 [2020-09-24 21:50:05,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:50:05,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-24 21:50:05,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-09-24 21:50:05,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-24 21:50:05,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-09-24 21:50:05,022 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 27 [2020-09-24 21:50:05,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:05,022 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-09-24 21:50:05,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:50:05,024 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-09-24 21:50:05,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-24 21:50:05,026 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:05,026 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:05,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:50:05,027 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:05,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:05,027 INFO L82 PathProgramCache]: Analyzing trace with hash -2001266491, now seen corresponding path program 3 times [2020-09-24 21:50:05,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:05,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974093844] [2020-09-24 21:50:05,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:05,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:05,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:05,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-24 21:50:05,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:05,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-09-24 21:50:05,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:05,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 21:50:05,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 21:50:05,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 21:50:05,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:05,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:05,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:05,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:05,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:05,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:05,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:50:05,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:05,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:05,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:05,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:05,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 21:50:05,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974093844] [2020-09-24 21:50:05,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:05,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:50:05,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419035613] [2020-09-24 21:50:05,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:50:05,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:05,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:50:05,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:50:05,738 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 13 states. [2020-09-24 21:50:06,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:06,150 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-09-24 21:50:06,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 21:50:06,151 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-09-24 21:50:06,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:06,152 INFO L225 Difference]: With dead ends: 46 [2020-09-24 21:50:06,152 INFO L226 Difference]: Without dead ends: 41 [2020-09-24 21:50:06,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-09-24 21:50:06,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-24 21:50:06,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2020-09-24 21:50:06,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 21:50:06,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-09-24 21:50:06,166 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 32 [2020-09-24 21:50:06,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:06,167 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-09-24 21:50:06,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:50:06,169 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-09-24 21:50:06,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 21:50:06,170 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:06,170 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:06,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:50:06,172 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:06,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:06,173 INFO L82 PathProgramCache]: Analyzing trace with hash -674418815, now seen corresponding path program 2 times [2020-09-24 21:50:06,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:06,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289697982] [2020-09-24 21:50:06,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:06,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:06,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:06,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:06,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-24 21:50:06,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:06,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-09-24 21:50:06,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:06,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:50:06,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 21:50:06,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:50:06,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:06,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:06,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:06,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:06,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:06,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:06,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:50:06,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:06,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:06,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:06,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:06,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:50:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:06,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289697982] [2020-09-24 21:50:06,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:06,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 21:50:06,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256696936] [2020-09-24 21:50:06,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:50:06,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:06,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:50:06,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:50:06,377 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 7 states. [2020-09-24 21:50:06,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:06,454 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-09-24 21:50:06,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 21:50:06,454 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-09-24 21:50:06,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:06,455 INFO L225 Difference]: With dead ends: 56 [2020-09-24 21:50:06,456 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 21:50:06,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:50:06,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 21:50:06,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-24 21:50:06,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 21:50:06,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-09-24 21:50:06,462 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 33 [2020-09-24 21:50:06,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:06,463 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-09-24 21:50:06,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:50:06,463 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-09-24 21:50:06,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-24 21:50:06,464 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:06,464 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:06,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 21:50:06,465 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:06,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:06,465 INFO L82 PathProgramCache]: Analyzing trace with hash -809826651, now seen corresponding path program 3 times [2020-09-24 21:50:06,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:06,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094005302] [2020-09-24 21:50:06,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 21:50:06,478 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 21:50:06,479 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 21:50:06,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 21:50:06,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 09:50:06 BoogieIcfgContainer [2020-09-24 21:50:06,505 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 21:50:06,509 INFO L168 Benchmark]: Toolchain (without parser) took 5491.87 ms. Allocated memory was 147.8 MB in the beginning and 243.8 MB in the end (delta: 95.9 MB). Free memory was 104.7 MB in the beginning and 149.9 MB in the end (delta: -45.3 MB). Peak memory consumption was 50.7 MB. Max. memory is 7.1 GB. [2020-09-24 21:50:06,510 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 21:50:06,511 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.08 ms. Allocated memory is still 147.8 MB. Free memory was 104.0 MB in the beginning and 94.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-24 21:50:06,512 INFO L168 Benchmark]: Boogie Preprocessor took 132.16 ms. Allocated memory was 147.8 MB in the beginning and 205.0 MB in the end (delta: 57.1 MB). Free memory was 94.7 MB in the beginning and 185.0 MB in the end (delta: -90.3 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-09-24 21:50:06,512 INFO L168 Benchmark]: RCFGBuilder took 295.90 ms. Allocated memory is still 205.0 MB. Free memory was 185.0 MB in the beginning and 171.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-09-24 21:50:06,513 INFO L168 Benchmark]: TraceAbstraction took 4730.58 ms. Allocated memory was 205.0 MB in the beginning and 243.8 MB in the end (delta: 38.8 MB). Free memory was 170.8 MB in the beginning and 149.9 MB in the end (delta: 20.9 MB). Peak memory consumption was 59.7 MB. Max. memory is 7.1 GB. [2020-09-24 21:50:06,517 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 322.08 ms. Allocated memory is still 147.8 MB. Free memory was 104.0 MB in the beginning and 94.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.16 ms. Allocated memory was 147.8 MB in the beginning and 205.0 MB in the end (delta: 57.1 MB). Free memory was 94.7 MB in the beginning and 185.0 MB in the end (delta: -90.3 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 295.90 ms. Allocated memory is still 205.0 MB. Free memory was 185.0 MB in the beginning and 171.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4730.58 ms. Allocated memory was 205.0 MB in the beginning and 243.8 MB in the end (delta: 38.8 MB). Free memory was 170.8 MB in the beginning and 149.9 MB in the end (delta: 20.9 MB). Peak memory consumption was 59.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND TRUE i==4 [L15] sn=-10 [L13] i++ [L13] COND FALSE !(i<=n) [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.6s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 122 SDtfs, 53 SDslu, 487 SDs, 0 SdLazy, 440 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 11 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 212 NumberOfCodeBlocks, 212 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 166 ConstructedInterpolants, 0 QuantifiedInterpolants, 21585 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 23/60 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...