/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/phases_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 23:39:21,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 23:39:21,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 23:39:21,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 23:39:21,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 23:39:21,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 23:39:21,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 23:39:21,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 23:39:21,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 23:39:21,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 23:39:21,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 23:39:21,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 23:39:21,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 23:39:21,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 23:39:21,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 23:39:21,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 23:39:21,364 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 23:39:21,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 23:39:21,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 23:39:21,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 23:39:21,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 23:39:21,370 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 23:39:21,374 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 23:39:21,375 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 23:39:21,377 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 23:39:21,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 23:39:21,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 23:39:21,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 23:39:21,386 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 [2020-08-18 23:39:21,407 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 23:39:21,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 23:39:21,409 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 23:39:21,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 23:39:21,409 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 23:39:21,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 23:39:21,410 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 23:39:21,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 23:39:21,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 23:39:21,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 23:39:21,410 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 23:39:21,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 23:39:21,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 23:39:21,411 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 23:39:21,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 23:39:21,411 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 23:39:21,411 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 23:39:21,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 23:39:21,412 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 23:39:21,412 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 23:39:21,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 23:39:21,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:39:21,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 23:39:21,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 23:39:21,413 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 23:39:21,413 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 23:39:21,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 23:39:21,414 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 23:39:21,414 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 23:39:21,414 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; [2020-08-18 23:39:21,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 23:39:21,759 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 23:39:21,765 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 23:39:21,767 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 23:39:21,768 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 23:39:21,769 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_2-2.c [2020-08-18 23:39:21,833 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/48cc76b94/efaa6e070b254076ac57f9739faa3e8f/FLAG17c822372 [2020-08-18 23:39:22,346 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 23:39:22,346 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/phases_2-2.c [2020-08-18 23:39:22,353 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/48cc76b94/efaa6e070b254076ac57f9739faa3e8f/FLAG17c822372 [2020-08-18 23:39:22,777 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/48cc76b94/efaa6e070b254076ac57f9739faa3e8f [2020-08-18 23:39:22,786 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 23:39:22,788 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 23:39:22,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 23:39:22,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 23:39:22,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 23:39:22,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:39:22" (1/1) ... [2020-08-18 23:39:22,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6752e30a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:22, skipping insertion in model container [2020-08-18 23:39:22,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:39:22" (1/1) ... [2020-08-18 23:39:22,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 23:39:22,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 23:39:23,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:39:23,082 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 23:39:23,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:39:23,120 INFO L208 MainTranslator]: Completed translation [2020-08-18 23:39:23,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:23 WrapperNode [2020-08-18 23:39:23,121 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 23:39:23,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 23:39:23,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 23:39:23,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 23:39:23,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:23" (1/1) ... [2020-08-18 23:39:23,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:23" (1/1) ... [2020-08-18 23:39:23,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:23" (1/1) ... [2020-08-18 23:39:23,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:23" (1/1) ... [2020-08-18 23:39:23,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:23" (1/1) ... [2020-08-18 23:39:23,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:23" (1/1) ... [2020-08-18 23:39:23,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:23" (1/1) ... [2020-08-18 23:39:23,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 23:39:23,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 23:39:23,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 23:39:23,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 23:39:23,231 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:23" (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 [2020-08-18 23:39:23,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 23:39:23,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 23:39:23,290 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 23:39:23,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 23:39:23,291 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 23:39:23,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 23:39:23,292 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 23:39:23,292 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 23:39:23,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 23:39:23,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 23:39:23,294 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 23:39:23,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 23:39:23,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 23:39:23,569 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 23:39:23,569 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 23:39:23,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:39:23 BoogieIcfgContainer [2020-08-18 23:39:23,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 23:39:23,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 23:39:23,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 23:39:23,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 23:39:23,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:39:22" (1/3) ... [2020-08-18 23:39:23,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f9896 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:39:23, skipping insertion in model container [2020-08-18 23:39:23,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:23" (2/3) ... [2020-08-18 23:39:23,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f9896 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:39:23, skipping insertion in model container [2020-08-18 23:39:23,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:39:23" (3/3) ... [2020-08-18 23:39:23,613 INFO L109 eAbstractionObserver]: Analyzing ICFG phases_2-2.c [2020-08-18 23:39:23,637 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 23:39:23,646 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 23:39:23,671 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 23:39:23,697 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 23:39:23,698 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 23:39:23,698 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 23:39:23,698 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 23:39:23,698 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 23:39:23,698 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 23:39:23,698 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 23:39:23,698 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 23:39:23,714 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-18 23:39:23,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-18 23:39:23,719 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:39:23,720 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:39:23,720 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:39:23,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:39:23,725 INFO L82 PathProgramCache]: Analyzing trace with hash 900249630, now seen corresponding path program 1 times [2020-08-18 23:39:23,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:39:23,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672494507] [2020-08-18 23:39:23,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:39:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:23,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:39:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:39:23,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672494507] [2020-08-18 23:39:23,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:39:23,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-18 23:39:23,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896215630] [2020-08-18 23:39:23,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-18 23:39:23,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:39:23,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-18 23:39:23,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 23:39:23,893 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-08-18 23:39:23,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:39:23,913 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-08-18 23:39:23,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-18 23:39:23,914 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-08-18 23:39:23,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:39:23,922 INFO L225 Difference]: With dead ends: 30 [2020-08-18 23:39:23,923 INFO L226 Difference]: Without dead ends: 13 [2020-08-18 23:39:23,926 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 [2020-08-18 23:39:23,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-18 23:39:23,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-18 23:39:23,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-18 23:39:23,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-08-18 23:39:23,965 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2020-08-18 23:39:23,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:39:23,966 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-08-18 23:39:23,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-18 23:39:23,966 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-08-18 23:39:23,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-18 23:39:23,967 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:39:23,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:39:23,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 23:39:23,968 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:39:23,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:39:23,969 INFO L82 PathProgramCache]: Analyzing trace with hash 891014420, now seen corresponding path program 1 times [2020-08-18 23:39:23,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:39:23,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562473776] [2020-08-18 23:39:23,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:39:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:24,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:39:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:39:24,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562473776] [2020-08-18 23:39:24,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:39:24,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 23:39:24,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561809497] [2020-08-18 23:39:24,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 23:39:24,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:39:24,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 23:39:24,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 23:39:24,352 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2020-08-18 23:39:26,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:39:26,526 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-08-18 23:39:26,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 23:39:26,527 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-08-18 23:39:26,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:39:26,528 INFO L225 Difference]: With dead ends: 20 [2020-08-18 23:39:26,528 INFO L226 Difference]: Without dead ends: 15 [2020-08-18 23:39:26,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-18 23:39:26,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-08-18 23:39:26,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-08-18 23:39:26,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-18 23:39:26,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-08-18 23:39:26,536 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2020-08-18 23:39:26,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:39:26,536 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-08-18 23:39:26,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 23:39:26,536 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-08-18 23:39:26,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 23:39:26,537 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:39:26,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:39:26,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 23:39:26,538 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:39:26,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:39:26,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1596010865, now seen corresponding path program 1 times [2020-08-18 23:39:26,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:39:26,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714873569] [2020-08-18 23:39:26,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:39:26,547 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-18 23:39:26,548 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-18 23:39:26,548 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 23:39:26,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 23:39:26,567 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-18 23:39:26,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:39:26 BoogieIcfgContainer [2020-08-18 23:39:26,568 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 23:39:26,571 INFO L168 Benchmark]: Toolchain (without parser) took 3782.13 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 101.6 MB in the beginning and 115.4 MB in the end (delta: -13.9 MB). Peak memory consumption was 48.0 MB. Max. memory is 7.1 GB. [2020-08-18 23:39:26,572 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.5 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-08-18 23:39:26,573 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.29 ms. Allocated memory is still 138.4 MB. Free memory was 101.1 MB in the beginning and 91.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-18 23:39:26,574 INFO L168 Benchmark]: Boogie Preprocessor took 107.74 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 91.5 MB in the beginning and 178.6 MB in the end (delta: -87.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-18 23:39:26,575 INFO L168 Benchmark]: RCFGBuilder took 345.79 ms. Allocated memory is still 200.3 MB. Free memory was 178.6 MB in the beginning and 165.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-18 23:39:26,576 INFO L168 Benchmark]: TraceAbstraction took 2980.33 ms. Allocated memory is still 200.3 MB. Free memory was 164.7 MB in the beginning and 115.4 MB in the end (delta: 49.3 MB). Peak memory consumption was 49.3 MB. Max. memory is 7.1 GB. [2020-08-18 23:39:26,581 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.5 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 331.29 ms. Allocated memory is still 138.4 MB. Free memory was 101.1 MB in the beginning and 91.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.74 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 91.5 MB in the beginning and 178.6 MB in the end (delta: -87.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 345.79 ms. Allocated memory is still 200.3 MB. Free memory was 178.6 MB in the beginning and 165.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2980.33 ms. Allocated memory is still 200.3 MB. Free memory was 164.7 MB in the beginning and 115.4 MB in the end (delta: 49.3 MB). Peak memory consumption was 49.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L16] unsigned int x = 1; [L17] unsigned int y = __VERIFIER_nondet_uint(); [L19] COND FALSE !(!(y > 0)) [L21] COND TRUE x < y [L22] COND FALSE !(x < y / x) [L25] x++ [L21] COND FALSE !(x < y) [L29] CALL __VERIFIER_assert(x == y) [L9] COND TRUE !(cond) [L10] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 2.8s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 30 SDtfs, 6 SDslu, 30 SDs, 0 SdLazy, 30 SolverSat, 2 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 940 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...