/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/multivar_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 15:07:52,268 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 15:07:52,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 15:07:52,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 15:07:52,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 15:07:52,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 15:07:52,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 15:07:52,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 15:07:52,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 15:07:52,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 15:07:52,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 15:07:52,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 15:07:52,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:07:52,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:07:52,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:07:52,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:07:52,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:07:52,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:07:52,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:07:52,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:07:52,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:07:52,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:07:52,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:07:52,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:07:52,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 15:07:52,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:07:52,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:07:52,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:07:52,398 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 15:07:52,451 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:07:52,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:07:52,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:07:52,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:07:52,454 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:07:52,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:07:52,455 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:07:52,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:07:52,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:07:52,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:07:52,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:07:52,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:07:52,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:07:52,456 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:07:52,458 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:07:52,458 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:07:52,458 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:07:52,459 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:07:52,459 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:07:52,459 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:07:52,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:07:52,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:07:52,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:07:52,460 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:07:52,460 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:07:52,461 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:07:52,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:07:52,461 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:07:52,461 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:07:52,462 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 -> false [2020-09-24 15:07:52,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:07:53,001 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:07:53,005 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:07:53,007 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:07:53,008 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:07:53,009 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/multivar_1-2.c [2020-09-24 15:07:53,105 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3aa6d865d/1db8b5d3dc7e48bfadebfbd2d15e0275/FLAG0cced193f [2020-09-24 15:07:53,624 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:07:53,625 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/multivar_1-2.c [2020-09-24 15:07:53,633 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3aa6d865d/1db8b5d3dc7e48bfadebfbd2d15e0275/FLAG0cced193f [2020-09-24 15:07:53,963 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3aa6d865d/1db8b5d3dc7e48bfadebfbd2d15e0275 [2020-09-24 15:07:53,976 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:07:53,981 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:07:53,983 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:07:53,983 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:07:53,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:07:53,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:07:53" (1/1) ... [2020-09-24 15:07:53,991 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c31b5ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:53, skipping insertion in model container [2020-09-24 15:07:53,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:07:53" (1/1) ... [2020-09-24 15:07:54,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:07:54,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:07:54,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:07:54,239 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:07:54,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:07:54,269 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:07:54,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:54 WrapperNode [2020-09-24 15:07:54,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:07:54,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:07:54,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:07:54,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:07:54,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:54" (1/1) ... [2020-09-24 15:07:54,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:54" (1/1) ... [2020-09-24 15:07:54,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:54" (1/1) ... [2020-09-24 15:07:54,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:54" (1/1) ... [2020-09-24 15:07:54,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:54" (1/1) ... [2020-09-24 15:07:54,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:54" (1/1) ... [2020-09-24 15:07:54,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:54" (1/1) ... [2020-09-24 15:07:54,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:07:54,398 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:07:54,398 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:07:54,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:07:54,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:54" (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 15:07:54,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:07:54,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:07:54,487 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 15:07:54,487 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:07:54,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:07:54,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 15:07:54,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 15:07:54,488 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:07:54,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:07:54,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:07:54,692 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:07:54,693 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 15:07:54,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:07:54 BoogieIcfgContainer [2020-09-24 15:07:54,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:07:54,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:07:54,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:07:54,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:07:54,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:07:53" (1/3) ... [2020-09-24 15:07:54,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d26f2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:07:54, skipping insertion in model container [2020-09-24 15:07:54,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:54" (2/3) ... [2020-09-24 15:07:54,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d26f2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:07:54, skipping insertion in model container [2020-09-24 15:07:54,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:07:54" (3/3) ... [2020-09-24 15:07:54,710 INFO L109 eAbstractionObserver]: Analyzing ICFG multivar_1-2.c [2020-09-24 15:07:54,722 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:07:54,734 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:07:54,766 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:07:54,804 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:07:54,804 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:07:54,804 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:07:54,804 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:07:54,805 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:07:54,805 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:07:54,805 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:07:54,805 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:07:54,830 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-09-24 15:07:54,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-24 15:07:54,839 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:54,841 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:54,841 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:54,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:54,850 INFO L82 PathProgramCache]: Analyzing trace with hash 677098305, now seen corresponding path program 1 times [2020-09-24 15:07:54,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:54,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314513772] [2020-09-24 15:07:54,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:54,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:54,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:55,002 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 15:07:55,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314513772] [2020-09-24 15:07:55,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:55,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 15:07:55,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788662199] [2020-09-24 15:07:55,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 15:07:55,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:55,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 15:07:55,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 15:07:55,036 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-09-24 15:07:55,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:55,068 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-09-24 15:07:55,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 15:07:55,070 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-24 15:07:55,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:55,082 INFO L225 Difference]: With dead ends: 36 [2020-09-24 15:07:55,083 INFO L226 Difference]: Without dead ends: 19 [2020-09-24 15:07:55,088 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 [2020-09-24 15:07:55,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-24 15:07:55,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-09-24 15:07:55,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-09-24 15:07:55,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-09-24 15:07:55,139 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 12 [2020-09-24 15:07:55,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:55,140 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-09-24 15:07:55,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 15:07:55,141 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-09-24 15:07:55,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-24 15:07:55,141 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:55,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:55,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:07:55,142 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:55,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:55,143 INFO L82 PathProgramCache]: Analyzing trace with hash 667863095, now seen corresponding path program 1 times [2020-09-24 15:07:55,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:55,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485163897] [2020-09-24 15:07:55,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 15:07:55,184 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 15:07:55,185 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 15:07:55,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 15:07:55,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 03:07:55 BoogieIcfgContainer [2020-09-24 15:07:55,208 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 15:07:55,211 INFO L168 Benchmark]: Toolchain (without parser) took 1232.55 ms. Allocated memory was 146.8 MB in the beginning and 203.4 MB in the end (delta: 56.6 MB). Free memory was 102.5 MB in the beginning and 149.1 MB in the end (delta: -46.6 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-09-24 15:07:55,213 INFO L168 Benchmark]: CDTParser took 0.61 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 15:07:55,214 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.73 ms. Allocated memory is still 146.8 MB. Free memory was 101.9 MB in the beginning and 92.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-24 15:07:55,215 INFO L168 Benchmark]: Boogie Preprocessor took 127.34 ms. Allocated memory was 146.8 MB in the beginning and 203.4 MB in the end (delta: 56.6 MB). Free memory was 92.7 MB in the beginning and 182.6 MB in the end (delta: -89.9 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-24 15:07:55,216 INFO L168 Benchmark]: RCFGBuilder took 300.09 ms. Allocated memory is still 203.4 MB. Free memory was 182.6 MB in the beginning and 170.5 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2020-09-24 15:07:55,217 INFO L168 Benchmark]: TraceAbstraction took 508.71 ms. Allocated memory is still 203.4 MB. Free memory was 169.9 MB in the beginning and 149.1 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. [2020-09-24 15:07:55,221 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.61 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 287.73 ms. Allocated memory is still 146.8 MB. Free memory was 101.9 MB in the beginning and 92.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.34 ms. Allocated memory was 146.8 MB in the beginning and 203.4 MB in the end (delta: 56.6 MB). Free memory was 92.7 MB in the beginning and 182.6 MB in the end (delta: -89.9 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 300.09 ms. Allocated memory is still 203.4 MB. Free memory was 182.6 MB in the beginning and 170.5 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 508.71 ms. Allocated memory is still 203.4 MB. Free memory was 169.9 MB in the beginning and 149.1 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. 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 = __VERIFIER_nondet_uint(); [L13] unsigned int y = x + 1; [L15] COND FALSE !(x < 1024) [L20] CALL __VERIFIER_assert(x == y) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 121 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 proved your program to be incorrect! Received shutdown request...