/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 14:28:44,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 14:28:44,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 14:28:44,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 14:28:44,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 14:28:44,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 14:28:44,565 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 14:28:44,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 14:28:44,569 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 14:28:44,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 14:28:44,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 14:28:44,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 14:28:44,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 14:28:44,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 14:28:44,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 14:28:44,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 14:28:44,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 14:28:44,579 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 14:28:44,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 14:28:44,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 14:28:44,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 14:28:44,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 14:28:44,589 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 14:28:44,590 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 14:28:44,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 14:28:44,596 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 14:28:44,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 14:28:44,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 14:28:44,601 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 14:28:44,602 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 14:28:44,602 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 14:28:44,604 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 14:28:44,605 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 14:28:44,606 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 14:28:44,607 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 14:28:44,608 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 14:28:44,608 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 14:28:44,609 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 14:28:44,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 14:28:44,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 14:28:44,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 14:28:44,623 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 [2020-09-25 14:28:44,678 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 14:28:44,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 14:28:44,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 14:28:44,682 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 14:28:44,682 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 14:28:44,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 14:28:44,683 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 14:28:44,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 14:28:44,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 14:28:44,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 14:28:44,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 14:28:44,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 14:28:44,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 14:28:44,685 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 14:28:44,686 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 14:28:44,686 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 14:28:44,687 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 14:28:44,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 14:28:44,687 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 14:28:44,687 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 14:28:44,687 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 14:28:44,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:28:44,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 14:28:44,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 14:28:44,688 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 14:28:44,689 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 14:28:44,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 14:28:44,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 14:28:44,689 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 14:28:44,689 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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-09-25 14:28:45,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 14:28:45,246 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 14:28:45,251 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 14:28:45,253 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 14:28:45,253 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 14:28:45,254 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-09-25 14:28:45,351 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d174183dd/0af08dcdedf14e82bc0f1c30bb3d9dc2/FLAG4865b84d6 [2020-09-25 14:28:45,946 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 14:28:45,947 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-09-25 14:28:45,956 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d174183dd/0af08dcdedf14e82bc0f1c30bb3d9dc2/FLAG4865b84d6 [2020-09-25 14:28:46,258 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d174183dd/0af08dcdedf14e82bc0f1c30bb3d9dc2 [2020-09-25 14:28:46,273 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 14:28:46,280 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 14:28:46,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 14:28:46,281 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 14:28:46,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 14:28:46,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:28:46" (1/1) ... [2020-09-25 14:28:46,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5783693b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:28:46, skipping insertion in model container [2020-09-25 14:28:46,293 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:28:46" (1/1) ... [2020-09-25 14:28:46,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 14:28:46,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 14:28:46,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:28:46,569 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 14:28:46,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:28:46,613 INFO L208 MainTranslator]: Completed translation [2020-09-25 14:28:46,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:28:46 WrapperNode [2020-09-25 14:28:46,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 14:28:46,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 14:28:46,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 14:28:46,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 14:28:46,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:28:46" (1/1) ... [2020-09-25 14:28:46,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:28:46" (1/1) ... [2020-09-25 14:28:46,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:28:46" (1/1) ... [2020-09-25 14:28:46,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:28:46" (1/1) ... [2020-09-25 14:28:46,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:28:46" (1/1) ... [2020-09-25 14:28:46,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:28:46" (1/1) ... [2020-09-25 14:28:46,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:28:46" (1/1) ... [2020-09-25 14:28:46,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 14:28:46,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 14:28:46,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 14:28:46,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 14:28:46,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:28:46" (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 [2020-09-25 14:28:46,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 14:28:46,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 14:28:46,822 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 14:28:46,822 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 14:28:46,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 14:28:46,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 14:28:46,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 14:28:46,823 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 14:28:46,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 14:28:46,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 14:28:47,216 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 14:28:47,216 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 14:28:47,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:28:47 BoogieIcfgContainer [2020-09-25 14:28:47,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 14:28:47,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 14:28:47,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 14:28:47,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 14:28:47,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:28:46" (1/3) ... [2020-09-25 14:28:47,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51c72065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:28:47, skipping insertion in model container [2020-09-25 14:28:47,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:28:46" (2/3) ... [2020-09-25 14:28:47,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51c72065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:28:47, skipping insertion in model container [2020-09-25 14:28:47,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:28:47" (3/3) ... [2020-09-25 14:28:47,233 INFO L109 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2020-09-25 14:28:47,245 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 14:28:47,256 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 14:28:47,280 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 14:28:47,314 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 14:28:47,315 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 14:28:47,315 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 14:28:47,315 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 14:28:47,315 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 14:28:47,315 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 14:28:47,316 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 14:28:47,316 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 14:28:47,339 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-09-25 14:28:47,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-25 14:28:47,346 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:28:47,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:28:47,348 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:28:47,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:28:47,355 INFO L82 PathProgramCache]: Analyzing trace with hash -7732671, now seen corresponding path program 1 times [2020-09-25 14:28:47,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:28:47,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316600455] [2020-09-25 14:28:47,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:28:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:28:47,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:47,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:28:47,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 14:28:47,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:28:47,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-09-25 14:28:47,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:28:47,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:28:47,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:28:47,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 14:28:47,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:28:47,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 14:28:47,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:28:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:28:47,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:47,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:28:47,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 14:28:47,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:28:47,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 14:28:47,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:28:47,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:28:47,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:28:47,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:28:47,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:28:47,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:28:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:28:47,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316600455] [2020-09-25 14:28:47,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:28:47,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 14:28:47,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314700416] [2020-09-25 14:28:47,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 14:28:47,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:28:47,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 14:28:47,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 14:28:47,682 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 2 states. [2020-09-25 14:28:47,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:28:47,718 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2020-09-25 14:28:47,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 14:28:47,720 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-25 14:28:47,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:28:47,732 INFO L225 Difference]: With dead ends: 62 [2020-09-25 14:28:47,732 INFO L226 Difference]: Without dead ends: 45 [2020-09-25 14:28:47,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 14:28:47,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-25 14:28:47,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-09-25 14:28:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-25 14:28:47,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-09-25 14:28:47,791 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 12 [2020-09-25 14:28:47,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:28:47,792 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-09-25 14:28:47,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 14:28:47,793 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-09-25 14:28:47,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-25 14:28:47,793 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:28:47,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:28:47,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 14:28:47,795 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:28:47,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:28:47,795 INFO L82 PathProgramCache]: Analyzing trace with hash -87155477, now seen corresponding path program 1 times [2020-09-25 14:28:47,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:28:47,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708550141] [2020-09-25 14:28:47,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:28:47,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:28:47,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:47,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:28:47,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 14:28:47,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:28:47,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-09-25 14:28:47,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:28:47,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:28:47,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:28:47,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 14:28:47,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 14:28:47,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:28:48,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:28:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:28:48,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:48,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:28:48,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 14:28:48,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:28:48,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 14:28:48,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:28:48,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:28:48,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:28:48,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:28:48,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:28:48,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:28:48,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:28:48,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708550141] [2020-09-25 14:28:48,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:28:48,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 14:28:48,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029163656] [2020-09-25 14:28:48,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 14:28:48,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:28:48,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 14:28:48,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 14:28:48,175 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 3 states. [2020-09-25 14:28:48,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:28:48,259 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-09-25 14:28:48,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 14:28:48,260 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-09-25 14:28:48,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:28:48,262 INFO L225 Difference]: With dead ends: 55 [2020-09-25 14:28:48,262 INFO L226 Difference]: Without dead ends: 50 [2020-09-25 14:28:48,263 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 [2020-09-25 14:28:48,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-25 14:28:48,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-09-25 14:28:48,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-25 14:28:48,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2020-09-25 14:28:48,274 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 12 [2020-09-25 14:28:48,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:28:48,276 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2020-09-25 14:28:48,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 14:28:48,276 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2020-09-25 14:28:48,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 14:28:48,278 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:28:48,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:28:48,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 14:28:48,280 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:28:48,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:28:48,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1575516068, now seen corresponding path program 1 times [2020-09-25 14:28:48,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:28:48,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148560507] [2020-09-25 14:28:48,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:28:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:28:48,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:48,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:48,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:48,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:48,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:48,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:48,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:48,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:48,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:48,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:49,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:49,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:49,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:49,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:49,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:49,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:49,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:49,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:49,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:49,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:28:49,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 14:28:49,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-09-25 14:28:49,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1524 [2020-09-25 14:28:49,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:28:49,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:28:49,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:28:49,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 14:28:49,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 14:28:49,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 14:28:49,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:28:49,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:28:49,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:28:49,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:28:49,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 14:28:49,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:28:49,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 14:28:49,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:28:49,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:28:49,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:28:49,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:28:49,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:28:49,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 14:28:49,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:28:49,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148560507] [2020-09-25 14:28:49,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:28:49,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 14:28:49,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401379802] [2020-09-25 14:28:49,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 14:28:49,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:28:49,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 14:28:49,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 14:28:49,985 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 3 states. [2020-09-25 14:28:50,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:28:50,133 INFO L93 Difference]: Finished difference Result 96 states and 127 transitions. [2020-09-25 14:28:50,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 14:28:50,134 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-09-25 14:28:50,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:28:50,137 INFO L225 Difference]: With dead ends: 96 [2020-09-25 14:28:50,138 INFO L226 Difference]: Without dead ends: 58 [2020-09-25 14:28:50,139 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 [2020-09-25 14:28:50,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-25 14:28:50,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-09-25 14:28:50,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-25 14:28:50,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-09-25 14:28:50,161 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 33 [2020-09-25 14:28:50,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:28:50,161 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-09-25 14:28:50,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 14:28:50,161 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-09-25 14:28:50,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 14:28:50,163 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:28:50,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:28:50,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 14:28:50,163 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:28:50,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:28:50,164 INFO L82 PathProgramCache]: Analyzing trace with hash 132907260, now seen corresponding path program 1 times [2020-09-25 14:28:50,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:28:50,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786539773] [2020-09-25 14:28:50,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:28:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 14:28:50,187 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 14:28:50,187 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 14:28:50,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 14:28:50,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 02:28:50 BoogieIcfgContainer [2020-09-25 14:28:50,213 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 14:28:50,217 INFO L168 Benchmark]: Toolchain (without parser) took 3940.30 ms. Allocated memory was 140.0 MB in the beginning and 246.4 MB in the end (delta: 106.4 MB). Free memory was 103.1 MB in the beginning and 215.3 MB in the end (delta: -112.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 14:28:50,218 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 14:28:50,219 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.23 ms. Allocated memory is still 140.0 MB. Free memory was 102.5 MB in the beginning and 92.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-09-25 14:28:50,220 INFO L168 Benchmark]: Boogie Preprocessor took 121.59 ms. Allocated memory was 140.0 MB in the beginning and 200.8 MB in the end (delta: 60.8 MB). Free memory was 92.5 MB in the beginning and 179.9 MB in the end (delta: -87.4 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-09-25 14:28:50,221 INFO L168 Benchmark]: RCFGBuilder took 485.19 ms. Allocated memory is still 200.8 MB. Free memory was 179.9 MB in the beginning and 162.6 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-09-25 14:28:50,222 INFO L168 Benchmark]: TraceAbstraction took 2989.73 ms. Allocated memory was 200.8 MB in the beginning and 246.4 MB in the end (delta: 45.6 MB). Free memory was 161.9 MB in the beginning and 215.3 MB in the end (delta: -53.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 14:28:50,226 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 333.23 ms. Allocated memory is still 140.0 MB. Free memory was 102.5 MB in the beginning and 92.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.59 ms. Allocated memory was 140.0 MB in the beginning and 200.8 MB in the end (delta: 60.8 MB). Free memory was 92.5 MB in the beginning and 179.9 MB in the end (delta: -87.4 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 485.19 ms. Allocated memory is still 200.8 MB. Free memory was 179.9 MB in the beginning and 162.6 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2989.73 ms. Allocated memory was 200.8 MB in the beginning and 246.4 MB in the end (delta: 45.6 MB). Free memory was 161.9 MB in the beginning and 215.3 MB in the end (delta: -53.4 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] unsigned int x = 0; [L13] unsigned int y = __VERIFIER_nondet_uint(); [L15] COND TRUE x < 99 [L16] COND FALSE !(y % 2 == 0) [L17] x += 2 [L19] COND FALSE !(y % 2 == 0) [L20] x -= 2 [L22] COND FALSE !(y % 2 == 0) [L23] x += 2 [L25] COND FALSE !(y % 2 == 0) [L26] x -= 2 [L28] COND FALSE !(y % 2 == 0) [L29] x += 2 [L31] COND FALSE !(y % 2 == 0) [L32] x -= 4 [L34] COND FALSE !(y % 2 == 0) [L35] x += 4 [L37] COND FALSE !(y % 2 == 0) [L38] x += 2 [L40] COND FALSE !(y % 2 == 0) [L41] x -= 4 [L43] COND FALSE !(y % 2 == 0) [L44] x -= 4 [L15] COND FALSE !(x < 99) [L47] CALL __VERIFIER_assert((x % 2) == (y % 2)) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.8s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 160 SDtfs, 24 SDslu, 53 SDs, 0 SdLazy, 47 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=3, 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, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 9976 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 1/1 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...