/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_FUNCTIONS --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/loop-invariants/eq2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:31:49,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:31:49,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:31:49,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:31:49,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:31:49,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:31:49,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:31:49,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:31:49,444 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:31:49,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:31:49,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:31:49,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:31:49,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:31:49,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:31:49,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:31:49,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:31:49,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:31:49,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:31:49,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:31:49,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:31:49,467 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:31:49,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:31:49,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:31:49,472 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:31:49,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 14:31:49,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:31:49,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:31:49,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:31:49,486 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 14:31:49,522 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:31:49,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:31:49,524 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:31:49,524 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:31:49,524 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:31:49,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:31:49,525 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:31:49,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:31:49,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:31:49,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:31:49,525 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:31:49,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:31:49,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:31:49,526 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:31:49,533 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:31:49,534 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:31:49,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:31:49,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:31:49,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:31:49,534 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:31:49,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:31:49,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:31:49,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:31:49,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:31:49,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:31:49,535 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:31:49,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:31:49,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:31:49,536 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:31:49,536 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_FUNCTIONS 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 14:31:49,811 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:31:49,824 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:31:49,827 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:31:49,829 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:31:49,829 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:31:49,830 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/eq2.c [2020-07-21 14:31:49,900 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e04e43f1d/4a8f7ecc61484dce84dfb932de395958/FLAGc7df59615 [2020-07-21 14:31:50,340 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:31:50,340 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/eq2.c [2020-07-21 14:31:50,347 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e04e43f1d/4a8f7ecc61484dce84dfb932de395958/FLAGc7df59615 [2020-07-21 14:31:50,739 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e04e43f1d/4a8f7ecc61484dce84dfb932de395958 [2020-07-21 14:31:50,748 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:31:50,750 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:31:50,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:31:50,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:31:50,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:31:50,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:31:50" (1/1) ... [2020-07-21 14:31:50,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75b85af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:50, skipping insertion in model container [2020-07-21 14:31:50,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:31:50" (1/1) ... [2020-07-21 14:31:50,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:31:50,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:31:50,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:31:50,938 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:31:50,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:31:50,967 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:31:50,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:50 WrapperNode [2020-07-21 14:31:50,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:31:50,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:31:50,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:31:50,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:31:50,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:50" (1/1) ... [2020-07-21 14:31:50,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:50" (1/1) ... [2020-07-21 14:31:50,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:50" (1/1) ... [2020-07-21 14:31:50,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:50" (1/1) ... [2020-07-21 14:31:50,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:50" (1/1) ... [2020-07-21 14:31:50,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:50" (1/1) ... [2020-07-21 14:31:50,992 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:50" (1/1) ... [2020-07-21 14:31:51,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:31:51,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:31:51,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:31:51,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:31:51,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:50" (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 14:31:51,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:31:51,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:31:51,136 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 14:31:51,136 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:31:51,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:31:51,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 14:31:51,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 14:31:51,137 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:31:51,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:31:51,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:31:51,308 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:31:51,308 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 14:31:51,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:31:51 BoogieIcfgContainer [2020-07-21 14:31:51,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:31:51,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:31:51,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:31:51,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:31:51,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:31:50" (1/3) ... [2020-07-21 14:31:51,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154214f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:31:51, skipping insertion in model container [2020-07-21 14:31:51,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:50" (2/3) ... [2020-07-21 14:31:51,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154214f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:31:51, skipping insertion in model container [2020-07-21 14:31:51,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:31:51" (3/3) ... [2020-07-21 14:31:51,326 INFO L109 eAbstractionObserver]: Analyzing ICFG eq2.c [2020-07-21 14:31:51,336 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:31:51,341 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:31:51,352 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:31:51,374 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:31:51,374 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:31:51,374 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:31:51,374 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:31:51,375 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:31:51,375 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:31:51,375 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:31:51,375 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:31:51,392 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-07-21 14:31:51,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 14:31:51,398 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:31:51,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:31:51,400 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:31:51,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:31:51,406 INFO L82 PathProgramCache]: Analyzing trace with hash -14991171, now seen corresponding path program 1 times [2020-07-21 14:31:51,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:31:51,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982096409] [2020-07-21 14:31:51,417 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 14:31:51,480 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:31:51,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:31:51,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 14:31:51,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:31:51,593 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 14:31:51,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:31:51,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982096409] [2020-07-21 14:31:51,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:31:51,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:31:51,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681729324] [2020-07-21 14:31:51,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:31:51,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:31:51,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:31:51,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:31:51,621 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-07-21 14:31:51,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:31:51,680 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-07-21 14:31:51,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:31:51,682 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-21 14:31:51,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:31:51,688 INFO L225 Difference]: With dead ends: 28 [2020-07-21 14:31:51,688 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 14:31:51,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 14:31:51,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 14:31:51,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 14:31:51,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 14:31:51,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 14:31:51,718 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2020-07-21 14:31:51,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:31:51,719 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 14:31:51,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:31:51,719 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 14:31:51,719 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 14:31:51,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:31:51,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 14:31:51,992 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 14:31:51,993 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 14:31:51,993 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 14:31:51,993 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 14:31:51,993 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 14:31:51,993 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 14:31:51,994 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 20) the Hoare annotation is: true [2020-07-21 14:31:51,994 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 20) no Hoare annotation was computed. [2020-07-21 14:31:51,994 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-07-21 14:31:51,994 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 9 20) no Hoare annotation was computed. [2020-07-21 14:31:51,994 INFO L264 CegarLoopResult]: At program point L14-2(lines 14 17) the Hoare annotation is: (= main_~z~0 main_~y~0) [2020-07-21 14:31:51,995 INFO L264 CegarLoopResult]: At program point L14-3(lines 14 17) the Hoare annotation is: (= main_~z~0 main_~y~0) [2020-07-21 14:31:51,995 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-21 14:31:51,995 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-21 14:31:51,995 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 14:31:51,996 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-21 14:31:51,996 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-21 14:31:51,996 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-21 14:31:52,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 02:31:52 BoogieIcfgContainer [2020-07-21 14:31:52,010 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 14:31:52,013 INFO L168 Benchmark]: Toolchain (without parser) took 1262.70 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 102.6 MB in the beginning and 140.7 MB in the end (delta: -38.1 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2020-07-21 14:31:52,014 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 146.3 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 14:31:52,015 INFO L168 Benchmark]: CACSL2BoogieTranslator took 216.88 ms. Allocated memory is still 146.3 MB. Free memory was 102.2 MB in the beginning and 92.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-21 14:31:52,016 INFO L168 Benchmark]: Boogie Preprocessor took 111.02 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 92.8 MB in the beginning and 184.1 MB in the end (delta: -91.3 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-07-21 14:31:52,017 INFO L168 Benchmark]: RCFGBuilder took 234.56 ms. Allocated memory is still 203.9 MB. Free memory was 184.1 MB in the beginning and 171.9 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-07-21 14:31:52,018 INFO L168 Benchmark]: TraceAbstraction took 694.86 ms. Allocated memory is still 203.9 MB. Free memory was 171.3 MB in the beginning and 140.7 MB in the end (delta: 30.5 MB). Peak memory consumption was 30.5 MB. Max. memory is 7.1 GB. [2020-07-21 14:31:52,023 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 146.3 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 216.88 ms. Allocated memory is still 146.3 MB. Free memory was 102.2 MB in the beginning and 92.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.02 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 92.8 MB in the beginning and 184.1 MB in the end (delta: -91.3 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 234.56 ms. Allocated memory is still 203.9 MB. Free memory was 184.1 MB in the beginning and 171.9 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 694.86 ms. Allocated memory is still 203.9 MB. Free memory was 171.3 MB in the beginning and 140.7 MB in the end (delta: 30.5 MB). Peak memory consumption was 30.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 14]: Loop Invariant Derived loop invariant: z == y - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.5s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 7 SDslu, 29 SDs, 0 SdLazy, 10 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 8 PreInvPairs, 9 NumberOfFragments, 11 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 153 SizeOfPredicates, 4 NumberOfNonLiveVariables, 29 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...