/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -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 0.1.25-177f698 [2020-08-21 16:39:36,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:39:36,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:39:37,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:39:37,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:39:37,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:39:37,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:39:37,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:39:37,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:39:37,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:39:37,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:39:37,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:39:37,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:39:37,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:39:37,032 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:39:37,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:39:37,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:39:37,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:39:37,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:39:37,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:39:37,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:39:37,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:39:37,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:39:37,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:39:37,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 16:39:37,063 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 16:39:37,068 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 16:39:37,069 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 16:39:37,069 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 16:39:37,070 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 16:39:37,070 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 16:39:37,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 16:39:37,074 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 16:39:37,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 16:39:37,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 16:39:37,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 16:39:37,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 16:39:37,080 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 16:39:37,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:39:37,082 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:39:37,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:39:37,084 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 [2020-08-21 16:39:37,122 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:39:37,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:39:37,125 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:39:37,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:39:37,125 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:39:37,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:39:37,126 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:39:37,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:39:37,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:39:37,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:39:37,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:39:37,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:39:37,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:39:37,129 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:39:37,129 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:39:37,129 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:39:37,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:39:37,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:39:37,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:39:37,130 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:39:37,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:39:37,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:39:37,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:39:37,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:39:37,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:39:37,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:39:37,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:39:37,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:39:37,132 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:39:37,132 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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:39:37,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:39:37,471 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:39:37,474 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:39:37,476 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:39:37,476 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:39:37,477 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_2-2.c [2020-08-21 16:39:37,550 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a7523458/3a4df85f6b844663aec3ae4cbbc3c2ce/FLAGe2d51c83e [2020-08-21 16:39:37,989 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:39:37,990 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/phases_2-2.c [2020-08-21 16:39:37,997 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a7523458/3a4df85f6b844663aec3ae4cbbc3c2ce/FLAGe2d51c83e [2020-08-21 16:39:38,360 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a7523458/3a4df85f6b844663aec3ae4cbbc3c2ce [2020-08-21 16:39:38,370 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:39:38,372 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:39:38,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:39:38,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:39:38,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:39:38,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:39:38" (1/1) ... [2020-08-21 16:39:38,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b40a169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:38, skipping insertion in model container [2020-08-21 16:39:38,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:39:38" (1/1) ... [2020-08-21 16:39:38,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:39:38,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:39:38,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:39:38,580 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:39:38,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:39:38,612 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:39:38,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:38 WrapperNode [2020-08-21 16:39:38,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:39:38,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:39:38,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:39:38,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:39:38,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:38" (1/1) ... [2020-08-21 16:39:38,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:38" (1/1) ... [2020-08-21 16:39:38,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:38" (1/1) ... [2020-08-21 16:39:38,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:38" (1/1) ... [2020-08-21 16:39:38,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:38" (1/1) ... [2020-08-21 16:39:38,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:38" (1/1) ... [2020-08-21 16:39:38,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:38" (1/1) ... [2020-08-21 16:39:38,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:39:38,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:39:38,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:39:38,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:39:38,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:38" (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 [2020-08-21 16:39:38,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:39:38,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:39:38,785 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 16:39:38,786 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 16:39:38,786 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:39:38,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:39:38,786 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 16:39:38,786 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 16:39:38,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 16:39:38,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 16:39:38,787 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:39:38,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:39:38,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:39:38,982 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:39:38,983 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 16:39:38,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:39:38 BoogieIcfgContainer [2020-08-21 16:39:38,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:39:38,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:39:38,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:39:38,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:39:38,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:39:38" (1/3) ... [2020-08-21 16:39:38,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7152e80e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:39:38, skipping insertion in model container [2020-08-21 16:39:38,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:38" (2/3) ... [2020-08-21 16:39:38,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7152e80e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:39:38, skipping insertion in model container [2020-08-21 16:39:39,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:39:38" (3/3) ... [2020-08-21 16:39:39,002 INFO L109 eAbstractionObserver]: Analyzing ICFG phases_2-2.c [2020-08-21 16:39:39,019 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:39:39,027 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:39:39,047 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:39:39,073 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:39:39,073 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:39:39,073 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:39:39,073 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:39:39,073 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:39:39,073 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:39:39,074 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:39:39,074 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:39:39,094 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-21 16:39:39,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-21 16:39:39,102 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:39,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:39,104 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:39,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:39,111 INFO L82 PathProgramCache]: Analyzing trace with hash 900249630, now seen corresponding path program 1 times [2020-08-21 16:39:39,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:39,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742833087] [2020-08-21 16:39:39,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:39,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:39,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:39:39,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742833087] [2020-08-21 16:39:39,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:39:39,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 16:39:39,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914852469] [2020-08-21 16:39:39,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 16:39:39,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:39,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 16:39:39,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 16:39:39,276 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-08-21 16:39:39,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:39,295 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-08-21 16:39:39,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 16:39:39,296 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-08-21 16:39:39,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:39,303 INFO L225 Difference]: With dead ends: 30 [2020-08-21 16:39:39,303 INFO L226 Difference]: Without dead ends: 13 [2020-08-21 16:39:39,306 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 [2020-08-21 16:39:39,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-21 16:39:39,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-21 16:39:39,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-21 16:39:39,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-08-21 16:39:39,339 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2020-08-21 16:39:39,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:39,339 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-08-21 16:39:39,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 16:39:39,340 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-08-21 16:39:39,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-21 16:39:39,340 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:39,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:39,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:39:39,341 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:39,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:39,342 INFO L82 PathProgramCache]: Analyzing trace with hash 891014420, now seen corresponding path program 1 times [2020-08-21 16:39:39,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:39,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205141211] [2020-08-21 16:39:39,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:39,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:39,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:39:39,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205141211] [2020-08-21 16:39:39,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:39:39,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 16:39:39,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468270709] [2020-08-21 16:39:39,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 16:39:39,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:39,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 16:39:39,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:39:39,647 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2020-08-21 16:39:41,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:41,817 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-08-21 16:39:41,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 16:39:41,819 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-08-21 16:39:41,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:41,820 INFO L225 Difference]: With dead ends: 20 [2020-08-21 16:39:41,820 INFO L226 Difference]: Without dead ends: 15 [2020-08-21 16:39:41,822 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 [2020-08-21 16:39:41,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-08-21 16:39:41,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-08-21 16:39:41,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-21 16:39:41,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-08-21 16:39:41,831 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2020-08-21 16:39:41,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:41,831 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-08-21 16:39:41,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 16:39:41,832 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-08-21 16:39:41,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 16:39:41,833 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:41,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:41,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:39:41,835 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:41,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:41,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1596010865, now seen corresponding path program 1 times [2020-08-21 16:39:41,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:41,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547302893] [2020-08-21 16:39:41,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:41,864 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-21 16:39:41,864 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-21 16:39:41,865 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 16:39:41,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:39:41,900 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-21 16:39:41,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:39:41 BoogieIcfgContainer [2020-08-21 16:39:41,902 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 16:39:41,905 INFO L168 Benchmark]: Toolchain (without parser) took 3532.24 ms. Allocated memory was 142.1 MB in the beginning and 202.9 MB in the end (delta: 60.8 MB). Free memory was 105.1 MB in the beginning and 118.9 MB in the end (delta: -13.8 MB). Peak memory consumption was 47.0 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:41,906 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 142.1 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 16:39:41,908 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.97 ms. Allocated memory is still 142.1 MB. Free memory was 104.9 MB in the beginning and 95.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:41,912 INFO L168 Benchmark]: Boogie Preprocessor took 108.56 ms. Allocated memory was 142.1 MB in the beginning and 202.9 MB in the end (delta: 60.8 MB). Free memory was 95.6 MB in the beginning and 182.9 MB in the end (delta: -87.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:41,913 INFO L168 Benchmark]: RCFGBuilder took 261.44 ms. Allocated memory is still 202.9 MB. Free memory was 182.9 MB in the beginning and 169.5 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:41,914 INFO L168 Benchmark]: TraceAbstraction took 2912.51 ms. Allocated memory is still 202.9 MB. Free memory was 168.8 MB in the beginning and 118.9 MB in the end (delta: 49.9 MB). Peak memory consumption was 49.9 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:41,923 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 142.1 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 237.97 ms. Allocated memory is still 142.1 MB. Free memory was 104.9 MB in the beginning and 95.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.56 ms. Allocated memory was 142.1 MB in the beginning and 202.9 MB in the end (delta: 60.8 MB). Free memory was 95.6 MB in the beginning and 182.9 MB in the end (delta: -87.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 261.44 ms. Allocated memory is still 202.9 MB. Free memory was 182.9 MB in the beginning and 169.5 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2912.51 ms. Allocated memory is still 202.9 MB. Free memory was 168.8 MB in the beginning and 118.9 MB in the end (delta: 49.9 MB). Peak memory consumption was 49.9 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...