/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 NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -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 16:44:10,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:44:10,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:44:10,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-21 16:44:10,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:44:10,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:44:10,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:44:10,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:44:10,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:44:10,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:44:10,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:44:10,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:44:10,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:44:10,971 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:44:10,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:44:10,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:44:10,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:44:10,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:44:10,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:44:10,990 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:44:10,991 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 16:44:11,011 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:44:11,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:44:11,013 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:44:11,013 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:44:11,014 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:44:11,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:44:11,014 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:44:11,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:44:11,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:44:11,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:44:11,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:44:11,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:44:11,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:44:11,016 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:44:11,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:44:11,016 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:44:11,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:44:11,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:44:11,017 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:44:11,017 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:44:11,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:44:11,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:44:11,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:44:11,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:44:11,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:44:11,023 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:44:11,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:11,023 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:44:11,023 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:44:11,023 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 -> NUM_VARIABLES 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 -> 2 [2020-07-21 16:44:11,417 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:44:11,434 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:44:11,438 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:44:11,441 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:44:11,441 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:44:11,442 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum03-2.i [2020-07-21 16:44:11,527 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dea7aaa99/9894af9386914eb18f63290be2398b86/FLAG7f9f372fe [2020-07-21 16:44:12,104 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:44:12,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum03-2.i [2020-07-21 16:44:12,119 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dea7aaa99/9894af9386914eb18f63290be2398b86/FLAG7f9f372fe [2020-07-21 16:44:12,412 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dea7aaa99/9894af9386914eb18f63290be2398b86 [2020-07-21 16:44:12,422 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:44:12,425 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:44:12,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:44:12,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:44:12,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:44:12,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:44:12" (1/1) ... [2020-07-21 16:44:12,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@518c2b23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:12, skipping insertion in model container [2020-07-21 16:44:12,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:44:12" (1/1) ... [2020-07-21 16:44:12,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:44:12,465 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:44:12,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:44:12,662 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:44:12,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:44:12,700 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:44:12,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:12 WrapperNode [2020-07-21 16:44:12,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:44:12,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:44:12,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:44:12,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:44:12,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:12" (1/1) ... [2020-07-21 16:44:12,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:12" (1/1) ... [2020-07-21 16:44:12,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:12" (1/1) ... [2020-07-21 16:44:12,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:12" (1/1) ... [2020-07-21 16:44:12,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:12" (1/1) ... [2020-07-21 16:44:12,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:12" (1/1) ... [2020-07-21 16:44:12,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:12" (1/1) ... [2020-07-21 16:44:12,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:44:12,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:44:12,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:44:12,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:44:12,855 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:12" (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 16:44:12,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:44:12,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:44:12,937 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 16:44:12,937 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:44:12,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:44:12,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:44:12,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 16:44:12,938 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:44:12,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:44:12,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:44:13,167 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:44:13,168 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 16:44:13,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:44:13 BoogieIcfgContainer [2020-07-21 16:44:13,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:44:13,176 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:44:13,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:44:13,182 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:44:13,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:44:12" (1/3) ... [2020-07-21 16:44:13,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1688e472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:44:13, skipping insertion in model container [2020-07-21 16:44:13,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:12" (2/3) ... [2020-07-21 16:44:13,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1688e472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:44:13, skipping insertion in model container [2020-07-21 16:44:13,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:44:13" (3/3) ... [2020-07-21 16:44:13,191 INFO L109 eAbstractionObserver]: Analyzing ICFG sum03-2.i [2020-07-21 16:44:13,206 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:44:13,215 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:44:13,230 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:44:13,266 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:44:13,266 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:44:13,266 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:44:13,266 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:44:13,267 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:44:13,267 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:44:13,267 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:44:13,267 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:44:13,295 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-07-21 16:44:13,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 16:44:13,304 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:13,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:44:13,306 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:13,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:13,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1847991872, now seen corresponding path program 1 times [2020-07-21 16:44:13,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:13,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028503571] [2020-07-21 16:44:13,326 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 16:44:13,429 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:13,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:13,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 16:44:13,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:13,597 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 16:44:13,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:44:13,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028503571] [2020-07-21 16:44:13,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:44:13,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 16:44:13,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056877645] [2020-07-21 16:44:13,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 16:44:13,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:13,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 16:44:13,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:44:13,640 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 6 states. [2020-07-21 16:44:13,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:13,770 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2020-07-21 16:44:13,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 16:44:13,773 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-07-21 16:44:13,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:13,787 INFO L225 Difference]: With dead ends: 32 [2020-07-21 16:44:13,787 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 16:44:13,793 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 16:44:13,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 16:44:13,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-07-21 16:44:13,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-21 16:44:13,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-07-21 16:44:13,854 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2020-07-21 16:44:13,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:13,855 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-07-21 16:44:13,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 16:44:13,856 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-07-21 16:44:13,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 16:44:13,858 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:13,858 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:44:14,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:14,073 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:14,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:14,074 INFO L82 PathProgramCache]: Analyzing trace with hash 982254813, now seen corresponding path program 1 times [2020-07-21 16:44:14,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:14,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4508742] [2020-07-21 16:44:14,076 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 16:44:14,139 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:14,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:14,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 16:44:14,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:14,257 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 16:44:14,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:44:14,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:44:14,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:44:18,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:18,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4508742] [2020-07-21 16:44:18,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:44:18,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 16:44:18,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423977611] [2020-07-21 16:44:18,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 16:44:18,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:18,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 16:44:18,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=62, Unknown=2, NotChecked=0, Total=90 [2020-07-21 16:44:18,776 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-07-21 16:44:19,094 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 11 [2020-07-21 16:44:19,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:19,237 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-07-21 16:44:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 16:44:19,239 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-07-21 16:44:19,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:19,240 INFO L225 Difference]: With dead ends: 22 [2020-07-21 16:44:19,240 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 16:44:19,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=38, Invalid=92, Unknown=2, NotChecked=0, Total=132 [2020-07-21 16:44:19,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 16:44:19,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 16:44:19,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 16:44:19,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 16:44:19,243 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-07-21 16:44:19,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:19,244 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 16:44:19,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 16:44:19,244 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 16:44:19,245 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 16:44:19,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:19,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 16:44:19,651 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 16:44:19,652 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 16:44:19,652 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 16:44:19,652 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 16:44:19,653 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 16:44:19,653 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 16:44:19,655 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 18) the Hoare annotation is: true [2020-07-21 16:44:19,655 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 18) no Hoare annotation was computed. [2020-07-21 16:44:19,656 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (= (mod (+ (* main_~x~0 2) 2) 4294967296) (mod (+ main_~sn~0 2) 4294967296)) [2020-07-21 16:44:19,656 INFO L264 CegarLoopResult]: At program point L16-1(lines 13 17) the Hoare annotation is: (= (mod (+ main_~sn~0 2) 4294967296) (mod (+ (* main_~x~0 2) 2) 4294967296)) [2020-07-21 16:44:19,656 INFO L268 CegarLoopResult]: For program point L13-2(lines 9 18) no Hoare annotation was computed. [2020-07-21 16:44:19,657 INFO L268 CegarLoopResult]: For program point L3-2(lines 2 7) no Hoare annotation was computed. [2020-07-21 16:44:19,658 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 2 7) the Hoare annotation is: true [2020-07-21 16:44:19,658 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 2 7) no Hoare annotation was computed. [2020-07-21 16:44:19,658 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 16:44:19,659 INFO L268 CegarLoopResult]: For program point L3(lines 3 5) no Hoare annotation was computed. [2020-07-21 16:44:19,659 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-07-21 16:44:19,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:44:19 BoogieIcfgContainer [2020-07-21 16:44:19,690 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:44:19,699 INFO L168 Benchmark]: Toolchain (without parser) took 7269.04 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 102.8 MB in the beginning and 95.0 MB in the end (delta: 7.8 MB). Peak memory consumption was 65.5 MB. Max. memory is 7.1 GB. [2020-07-21 16:44:19,701 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 16:44:19,706 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.11 ms. Allocated memory is still 144.7 MB. Free memory was 102.4 MB in the beginning and 92.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-21 16:44:19,712 INFO L168 Benchmark]: Boogie Preprocessor took 150.59 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 92.6 MB in the beginning and 182.5 MB in the end (delta: -89.9 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-07-21 16:44:19,714 INFO L168 Benchmark]: RCFGBuilder took 320.53 ms. Allocated memory is still 202.4 MB. Free memory was 182.5 MB in the beginning and 169.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-07-21 16:44:19,716 INFO L168 Benchmark]: TraceAbstraction took 6514.29 ms. Allocated memory is still 202.4 MB. Free memory was 169.2 MB in the beginning and 95.0 MB in the end (delta: 74.2 MB). Peak memory consumption was 74.2 MB. Max. memory is 7.1 GB. [2020-07-21 16:44:19,728 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 276.11 ms. Allocated memory is still 144.7 MB. Free memory was 102.4 MB in the beginning and 92.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 150.59 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 92.6 MB in the beginning and 182.5 MB in the end (delta: -89.9 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 320.53 ms. Allocated memory is still 202.4 MB. Free memory was 182.5 MB in the beginning and 169.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6514.29 ms. Allocated memory is still 202.4 MB. Free memory was 169.2 MB in the beginning and 95.0 MB in the end (delta: 74.2 MB). Peak memory consumption was 74.2 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 + 2) % 4294967296 == (x * 2 + 2) % 4294967296 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.1s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.6s, 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, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.8s 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, 4.7s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 39 ConstructedInterpolants, 0 QuantifiedInterpolants, 2265 SizeOfPredicates, 4 NumberOfNonLiveVariables, 75 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...