/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 false -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-eb0fd7c [2020-09-21 10:29:13,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:29:13,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:29:13,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:29:13,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:29:13,784 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:29:13,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:29:13,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:29:13,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:29:13,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:29:13,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:29:13,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:29:13,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:29:13,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:29:13,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:29:13,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:29:13,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:29:13,813 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:29:13,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:29:13,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:29:13,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:29:13,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:29:13,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:29:13,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:29:13,842 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:29:13,842 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:29:13,843 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:29:13,846 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:29:13,847 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:29:13,849 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 10:29:13,849 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:29:13,850 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:29:13,851 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:29:13,852 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:29:13,854 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:29:13,854 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:29:13,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:29:13,855 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:29:13,855 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:29:13,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:29:13,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:29:13,860 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 [2020-09-21 10:29:13,902 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:29:13,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:29:13,905 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:29:13,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:29:13,905 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:29:13,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:29:13,906 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:29:13,906 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:29:13,906 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:29:13,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:29:13,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:29:13,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:29:13,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:29:13,908 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:29:13,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:29:13,909 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:29:13,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:29:13,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:29:13,909 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:29:13,910 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:29:13,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:29:13,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:29:13,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:29:13,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:29:13,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:29:13,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:29:13,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:29:13,911 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:29:13,911 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:29:13,911 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 -> false [2020-09-21 10:29:14,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:29:14,477 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:29:14,482 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:29:14,484 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:29:14,484 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:29:14,485 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_2-2.c [2020-09-21 10:29:14,579 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/212db308c/6b927b0cf52f456abbc96a4154a67c61/FLAGa77754f64 [2020-09-21 10:29:15,164 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:29:15,165 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/phases_2-2.c [2020-09-21 10:29:15,174 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/212db308c/6b927b0cf52f456abbc96a4154a67c61/FLAGa77754f64 [2020-09-21 10:29:15,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/212db308c/6b927b0cf52f456abbc96a4154a67c61 [2020-09-21 10:29:15,528 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:29:15,535 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:29:15,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:29:15,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:29:15,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:29:15,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:29:15" (1/1) ... [2020-09-21 10:29:15,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab41b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:15, skipping insertion in model container [2020-09-21 10:29:15,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:29:15" (1/1) ... [2020-09-21 10:29:15,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:29:15,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:29:15,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:29:15,824 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:29:15,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:29:15,857 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:29:15,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:15 WrapperNode [2020-09-21 10:29:15,858 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:29:15,859 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:29:15,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:29:15,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:29:15,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:15" (1/1) ... [2020-09-21 10:29:15,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:15" (1/1) ... [2020-09-21 10:29:15,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:15" (1/1) ... [2020-09-21 10:29:15,953 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:15" (1/1) ... [2020-09-21 10:29:15,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:15" (1/1) ... [2020-09-21 10:29:15,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:15" (1/1) ... [2020-09-21 10:29:15,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:15" (1/1) ... [2020-09-21 10:29:15,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:29:15,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:29:15,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:29:15,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:29:15,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:15" (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 [2020-09-21 10:29:16,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:29:16,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:29:16,051 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 10:29:16,051 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 10:29:16,052 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:29:16,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:29:16,052 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 10:29:16,052 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 10:29:16,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-21 10:29:16,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 10:29:16,053 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:29:16,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:29:16,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:29:16,299 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:29:16,299 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 10:29:16,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:29:16 BoogieIcfgContainer [2020-09-21 10:29:16,304 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:29:16,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:29:16,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:29:16,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:29:16,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:29:15" (1/3) ... [2020-09-21 10:29:16,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c0fc0e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:29:16, skipping insertion in model container [2020-09-21 10:29:16,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:29:15" (2/3) ... [2020-09-21 10:29:16,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c0fc0e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:29:16, skipping insertion in model container [2020-09-21 10:29:16,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:29:16" (3/3) ... [2020-09-21 10:29:16,324 INFO L109 eAbstractionObserver]: Analyzing ICFG phases_2-2.c [2020-09-21 10:29:16,347 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:29:16,359 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:29:16,388 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:29:16,422 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:29:16,422 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:29:16,422 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:29:16,422 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:29:16,423 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:29:16,423 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:29:16,423 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:29:16,423 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:29:16,448 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-09-21 10:29:16,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-21 10:29:16,456 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:16,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:16,458 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:16,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:16,468 INFO L82 PathProgramCache]: Analyzing trace with hash 900249630, now seen corresponding path program 1 times [2020-09-21 10:29:16,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:16,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360839147] [2020-09-21 10:29:16,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:16,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:29:16,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360839147] [2020-09-21 10:29:16,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:29:16,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-21 10:29:16,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649228990] [2020-09-21 10:29:16,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-21 10:29:16,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:16,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-21 10:29:16,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 10:29:16,650 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-09-21 10:29:16,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:16,679 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-09-21 10:29:16,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-21 10:29:16,681 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-21 10:29:16,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:16,692 INFO L225 Difference]: With dead ends: 30 [2020-09-21 10:29:16,692 INFO L226 Difference]: Without dead ends: 13 [2020-09-21 10:29:16,696 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 [2020-09-21 10:29:16,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-09-21 10:29:16,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-09-21 10:29:16,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-09-21 10:29:16,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-09-21 10:29:16,745 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2020-09-21 10:29:16,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:16,746 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-09-21 10:29:16,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-21 10:29:16,746 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-09-21 10:29:16,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-21 10:29:16,747 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:16,747 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:16,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:29:16,748 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:16,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:16,749 INFO L82 PathProgramCache]: Analyzing trace with hash 891014420, now seen corresponding path program 1 times [2020-09-21 10:29:16,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:16,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184551416] [2020-09-21 10:29:16,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:16,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:17,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:29:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:29:17,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:29:17,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184551416] [2020-09-21 10:29:17,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:29:17,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:29:17,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882402607] [2020-09-21 10:29:17,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:29:17,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:29:17,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:29:17,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:29:17,071 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2020-09-21 10:29:19,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:29:19,255 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-09-21 10:29:19,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:29:19,256 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-21 10:29:19,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:29:19,257 INFO L225 Difference]: With dead ends: 20 [2020-09-21 10:29:19,258 INFO L226 Difference]: Without dead ends: 15 [2020-09-21 10:29:19,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:29:19,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-09-21 10:29:19,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-09-21 10:29:19,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-09-21 10:29:19,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-09-21 10:29:19,266 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2020-09-21 10:29:19,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:29:19,267 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-09-21 10:29:19,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:29:19,267 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-09-21 10:29:19,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 10:29:19,268 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:29:19,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:29:19,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:29:19,269 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:29:19,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:29:19,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1596010865, now seen corresponding path program 1 times [2020-09-21 10:29:19,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:29:19,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382813820] [2020-09-21 10:29:19,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:29:19,279 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-21 10:29:19,280 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-09-21 10:29:19,280 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:29:19,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:29:19,306 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-09-21 10:29:19,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:29:19 BoogieIcfgContainer [2020-09-21 10:29:19,307 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:29:19,311 INFO L168 Benchmark]: Toolchain (without parser) took 3778.63 ms. Allocated memory was 141.6 MB in the beginning and 202.4 MB in the end (delta: 60.8 MB). Free memory was 104.3 MB in the beginning and 117.8 MB in the end (delta: -13.5 MB). Peak memory consumption was 47.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:29:19,312 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:29:19,313 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.60 ms. Allocated memory is still 141.6 MB. Free memory was 103.6 MB in the beginning and 94.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:29:19,314 INFO L168 Benchmark]: Boogie Preprocessor took 108.09 ms. Allocated memory was 141.6 MB in the beginning and 202.4 MB in the end (delta: 60.8 MB). Free memory was 94.3 MB in the beginning and 180.5 MB in the end (delta: -86.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-21 10:29:19,315 INFO L168 Benchmark]: RCFGBuilder took 336.81 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 168.2 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:29:19,316 INFO L168 Benchmark]: TraceAbstraction took 3001.13 ms. Allocated memory is still 202.4 MB. Free memory was 168.2 MB in the beginning and 117.8 MB in the end (delta: 50.3 MB). Peak memory consumption was 50.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:29:19,321 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 322.60 ms. Allocated memory is still 141.6 MB. Free memory was 103.6 MB in the beginning and 94.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.09 ms. Allocated memory was 141.6 MB in the beginning and 202.4 MB in the end (delta: 60.8 MB). Free memory was 94.3 MB in the beginning and 180.5 MB in the end (delta: -86.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 336.81 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 168.2 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3001.13 ms. Allocated memory is still 202.4 MB. Free memory was 168.2 MB in the beginning and 117.8 MB in the end (delta: 50.3 MB). Peak memory consumption was 50.3 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, 0.2s 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...