/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum03-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:42:55,805 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 01:42:55,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:42:55,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:42:55,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:42:55,845 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:42:55,845 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:42:55,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:42:55,848 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:42:55,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:42:55,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:42:55,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:42:55,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:42:55,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:42:55,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:42:55,869 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 01:42:55,884 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:42:55,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:42:55,886 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:42:55,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:42:55,887 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:42:55,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:42:55,887 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:42:55,887 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:42:55,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:42:55,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:42:55,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:42:55,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:42:55,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:42:55,888 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:42:55,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:42:55,889 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:42:55,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:42:55,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:42:55,889 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:42:55,890 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:42:55,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:42:55,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:42:55,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:42:55,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:42:55,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:42:55,891 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:42:55,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:55,891 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:42:55,891 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:42:55,892 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 01:42:56,196 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:42:56,210 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:42:56,214 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:42:56,216 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:42:56,216 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:42:56,217 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum03-2.i [2020-07-21 01:42:56,302 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09759afd9/3a78187058f348c8bf2cc4460db3deda/FLAG8e02b3f2b [2020-07-21 01:42:56,857 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:42:56,858 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum03-2.i [2020-07-21 01:42:56,868 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09759afd9/3a78187058f348c8bf2cc4460db3deda/FLAG8e02b3f2b [2020-07-21 01:42:57,192 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09759afd9/3a78187058f348c8bf2cc4460db3deda [2020-07-21 01:42:57,204 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:42:57,207 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:42:57,208 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:42:57,208 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:42:57,212 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:42:57,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:42:57" (1/1) ... [2020-07-21 01:42:57,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f0e332a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:57, skipping insertion in model container [2020-07-21 01:42:57,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:42:57" (1/1) ... [2020-07-21 01:42:57,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:42:57,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:42:57,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:42:57,419 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:42:57,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:42:57,447 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:42:57,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:57 WrapperNode [2020-07-21 01:42:57,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:42:57,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:42:57,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:42:57,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:42:57,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:57" (1/1) ... [2020-07-21 01:42:57,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:57" (1/1) ... [2020-07-21 01:42:57,468 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:57" (1/1) ... [2020-07-21 01:42:57,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:57" (1/1) ... [2020-07-21 01:42:57,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:57" (1/1) ... [2020-07-21 01:42:57,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:57" (1/1) ... [2020-07-21 01:42:57,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:57" (1/1) ... [2020-07-21 01:42:57,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:42:57,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:42:57,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:42:57,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:42:57,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-21 01:42:57,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:42:57,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:42:57,638 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:42:57,638 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:42:57,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:42:57,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:42:57,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 01:42:57,639 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:42:57,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:42:57,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:42:57,832 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:42:57,832 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 01:42:57,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:42:57 BoogieIcfgContainer [2020-07-21 01:42:57,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:42:57,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:42:57,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:42:57,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:42:57,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:42:57" (1/3) ... [2020-07-21 01:42:57,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce123ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:42:57, skipping insertion in model container [2020-07-21 01:42:57,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:57" (2/3) ... [2020-07-21 01:42:57,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ce123ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:42:57, skipping insertion in model container [2020-07-21 01:42:57,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:42:57" (3/3) ... [2020-07-21 01:42:57,845 INFO L109 eAbstractionObserver]: Analyzing ICFG sum03-2.i [2020-07-21 01:42:57,856 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:42:57,863 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:42:57,876 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:42:57,898 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:42:57,898 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:42:57,899 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:42:57,899 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:42:57,899 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:42:57,899 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:42:57,899 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:42:57,900 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:42:57,916 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-07-21 01:42:57,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 01:42:57,922 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:57,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:57,923 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:57,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:57,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1847991872, now seen corresponding path program 1 times [2020-07-21 01:42:57,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:57,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922958463] [2020-07-21 01:42:57,938 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:58,020 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:42:58,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:58,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 01:42:58,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:58,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:42:58,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:42:58,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922958463] [2020-07-21 01:42:58,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:42:58,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 01:42:58,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489478895] [2020-07-21 01:42:58,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 01:42:58,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:58,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 01:42:58,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:42:58,201 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 6 states. [2020-07-21 01:42:58,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:58,318 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2020-07-21 01:42:58,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 01:42:58,320 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-07-21 01:42:58,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:58,330 INFO L225 Difference]: With dead ends: 32 [2020-07-21 01:42:58,330 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 01:42:58,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:42:58,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 01:42:58,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-07-21 01:42:58,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-21 01:42:58,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-07-21 01:42:58,382 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2020-07-21 01:42:58,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:58,383 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-07-21 01:42:58,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 01:42:58,383 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-07-21 01:42:58,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 01:42:58,384 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:58,385 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:58,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:58,601 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:58,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:58,602 INFO L82 PathProgramCache]: Analyzing trace with hash 982254813, now seen corresponding path program 1 times [2020-07-21 01:42:58,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:58,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275079947] [2020-07-21 01:42:58,603 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:58,650 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:42:58,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:58,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 01:42:58,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:42:58,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:42:58,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:42:58,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:43:01,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:43:01,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275079947] [2020-07-21 01:43:01,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:43:01,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 01:43:01,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929284564] [2020-07-21 01:43:01,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 01:43:01,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:43:01,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 01:43:01,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=63, Unknown=1, NotChecked=0, Total=90 [2020-07-21 01:43:01,043 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-07-21 01:43:07,735 WARN L193 SmtUtils]: Spent 6.50 s on a formula simplification. DAG size of input: 38 DAG size of output: 12 [2020-07-21 01:43:07,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:43:07,772 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-07-21 01:43:07,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 01:43:07,773 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-07-21 01:43:07,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:43:07,774 INFO L225 Difference]: With dead ends: 22 [2020-07-21 01:43:07,774 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 01:43:07,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=38, Invalid=93, Unknown=1, NotChecked=0, Total=132 [2020-07-21 01:43:07,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 01:43:07,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 01:43:07,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 01:43:07,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 01:43:07,778 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-07-21 01:43:07,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:43:07,778 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 01:43:07,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 01:43:07,779 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 01:43:07,779 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 01:43:07,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:43:07,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 01:43:08,116 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 01:43:08,116 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:43:08,116 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:43:08,117 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 01:43:08,117 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 01:43:08,117 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 01:43:08,117 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 18) the Hoare annotation is: true [2020-07-21 01:43:08,118 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 18) no Hoare annotation was computed. [2020-07-21 01:43:08,118 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (= (mod (+ main_~sn~0 4) 4294967296) (mod (+ (* main_~x~0 2) 4) 4294967296)) [2020-07-21 01:43:08,120 INFO L264 CegarLoopResult]: At program point L16-1(lines 13 17) the Hoare annotation is: (= (mod (+ main_~sn~0 4) 4294967296) (mod (+ (* main_~x~0 2) 4) 4294967296)) [2020-07-21 01:43:08,120 INFO L268 CegarLoopResult]: For program point L13-2(lines 9 18) no Hoare annotation was computed. [2020-07-21 01:43:08,120 INFO L268 CegarLoopResult]: For program point L3-2(lines 2 7) no Hoare annotation was computed. [2020-07-21 01:43:08,121 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 2 7) the Hoare annotation is: true [2020-07-21 01:43:08,121 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 2 7) no Hoare annotation was computed. [2020-07-21 01:43:08,121 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 01:43:08,121 INFO L268 CegarLoopResult]: For program point L3(lines 3 5) no Hoare annotation was computed. [2020-07-21 01:43:08,122 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-07-21 01:43:08,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:43:08 BoogieIcfgContainer [2020-07-21 01:43:08,154 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:43:08,159 INFO L168 Benchmark]: Toolchain (without parser) took 10950.26 ms. Allocated memory was 144.7 MB in the beginning and 201.3 MB in the end (delta: 56.6 MB). Free memory was 101.1 MB in the beginning and 93.3 MB in the end (delta: 7.8 MB). Peak memory consumption was 64.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:43:08,160 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-21 01:43:08,163 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.53 ms. Allocated memory is still 144.7 MB. Free memory was 100.7 MB in the beginning and 91.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-21 01:43:08,166 INFO L168 Benchmark]: Boogie Preprocessor took 116.05 ms. Allocated memory was 144.7 MB in the beginning and 201.3 MB in the end (delta: 56.6 MB). Free memory was 91.4 MB in the beginning and 181.3 MB in the end (delta: -90.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-07-21 01:43:08,167 INFO L168 Benchmark]: RCFGBuilder took 271.28 ms. Allocated memory is still 201.3 MB. Free memory was 181.3 MB in the beginning and 168.6 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-07-21 01:43:08,169 INFO L168 Benchmark]: TraceAbstraction took 10316.23 ms. Allocated memory is still 201.3 MB. Free memory was 167.9 MB in the beginning and 93.3 MB in the end (delta: 74.6 MB). Peak memory consumption was 74.6 MB. Max. memory is 7.1 GB. [2020-07-21 01:43:08,181 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 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 240.53 ms. Allocated memory is still 144.7 MB. Free memory was 100.7 MB in the beginning and 91.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.05 ms. Allocated memory was 144.7 MB in the beginning and 201.3 MB in the end (delta: 56.6 MB). Free memory was 91.4 MB in the beginning and 181.3 MB in the end (delta: -90.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 271.28 ms. Allocated memory is still 201.3 MB. Free memory was 181.3 MB in the beginning and 168.6 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10316.23 ms. Allocated memory is still 201.3 MB. Free memory was 167.9 MB in the beginning and 93.3 MB in the end (delta: 74.6 MB). Peak memory consumption was 74.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: (sn + 4) % 4294967296 == (x * 2 + 4) % 4294967296 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.0s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 6.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 10 SDslu, 70 SDs, 0 SdLazy, 67 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=1, 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, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 10 PreInvPairs, 17 NumberOfFragments, 31 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 37 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 26 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 39 ConstructedInterpolants, 0 QuantifiedInterpolants, 2265 SizeOfPredicates, 4 NumberOfNonLiveVariables, 74 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 4/8 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 correct! Received shutdown request...