/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/ldv-regression/test16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:41:28,894 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 22:41:28,987 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 22:41:29,010 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:41:29,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:41:29,013 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:41:29,014 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:41:29,014 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:41:29,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:41:29,014 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:41:29,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:41:29,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:41:29,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:41:29,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:41:29,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:41:29,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:41:29,016 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:41:29,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:41:29,016 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:41:29,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:41:29,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:41:29,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:41:29,018 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:41:29,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:41:29,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:41:29,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:41:29,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:41:29,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:41:29,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:41:29,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:41:29,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:41:29,021 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:41:29,021 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 22:41:29,552 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:41:29,575 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:41:29,581 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:41:29,585 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:41:29,585 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:41:29,587 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test16.c [2020-07-21 22:41:29,700 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b40ba902f/bea5433d03c2424cae096906f89147fc/FLAGabbfc05ea [2020-07-21 22:41:30,535 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:41:30,537 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test16.c [2020-07-21 22:41:30,552 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b40ba902f/bea5433d03c2424cae096906f89147fc/FLAGabbfc05ea [2020-07-21 22:41:30,789 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b40ba902f/bea5433d03c2424cae096906f89147fc [2020-07-21 22:41:30,811 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:41:30,819 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:41:30,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:41:30,822 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:41:30,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:41:30,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:41:30" (1/1) ... [2020-07-21 22:41:30,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14b045c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:30, skipping insertion in model container [2020-07-21 22:41:30,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:41:30" (1/1) ... [2020-07-21 22:41:30,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:41:30,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:41:31,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:41:31,256 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:41:31,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:41:31,316 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:41:31,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:31 WrapperNode [2020-07-21 22:41:31,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:41:31,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:41:31,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:41:31,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:41:31,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:31" (1/1) ... [2020-07-21 22:41:31,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:31" (1/1) ... [2020-07-21 22:41:31,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:31" (1/1) ... [2020-07-21 22:41:31,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:31" (1/1) ... [2020-07-21 22:41:31,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:31" (1/1) ... [2020-07-21 22:41:31,517 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:31" (1/1) ... [2020-07-21 22:41:31,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:31" (1/1) ... [2020-07-21 22:41:31,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:41:31,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:41:31,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:41:31,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:41:31,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:31" (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 22:41:31,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:41:31,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:41:31,628 INFO L138 BoogieDeclarations]: Found implementation of procedure equal [2020-07-21 22:41:31,628 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:41:31,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:41:31,629 INFO L130 BoogieDeclarations]: Found specification of procedure equal [2020-07-21 22:41:31,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 22:41:31,630 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:41:31,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 22:41:31,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:41:31,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 22:41:31,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-21 22:41:31,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:41:31,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 22:41:31,997 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:41:31,998 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 22:41:32,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:41:32 BoogieIcfgContainer [2020-07-21 22:41:32,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:41:32,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:41:32,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:41:32,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:41:32,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:41:30" (1/3) ... [2020-07-21 22:41:32,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@729913d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:41:32, skipping insertion in model container [2020-07-21 22:41:32,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:31" (2/3) ... [2020-07-21 22:41:32,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@729913d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:41:32, skipping insertion in model container [2020-07-21 22:41:32,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:41:32" (3/3) ... [2020-07-21 22:41:32,024 INFO L109 eAbstractionObserver]: Analyzing ICFG test16.c [2020-07-21 22:41:32,081 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:41:32,122 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:41:32,186 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:41:32,302 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:41:32,302 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:41:32,303 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:41:32,303 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:41:32,303 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:41:32,303 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:41:32,303 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:41:32,304 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:41:32,335 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-07-21 22:41:32,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 22:41:32,348 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:41:32,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:41:32,351 INFO L427 AbstractCegarLoop]: === Iteration 1 === [equalErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:41:32,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:41:32,363 INFO L82 PathProgramCache]: Analyzing trace with hash 390654600, now seen corresponding path program 1 times [2020-07-21 22:41:32,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:41:32,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199612959] [2020-07-21 22:41:32,377 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 22:41:32,576 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:41:32,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:41:32,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 22:41:32,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:41:32,783 INFO L350 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2020-07-21 22:41:32,785 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 15 [2020-07-21 22:41:32,787 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:41:32,803 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:41:32,805 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:41:32,806 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:15 [2020-07-21 22:41:32,965 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 22:41:32,966 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2020-07-21 22:41:32,975 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 22:41:33,021 INFO L624 ElimStorePlain]: treesize reduction 12, result has 36.8 percent of original size [2020-07-21 22:41:33,023 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 22:41:33,024 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:29, output treesize:7 [2020-07-21 22:41:33,059 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 22:41:33,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:41:33,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199612959] [2020-07-21 22:41:33,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:41:33,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:41:33,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137458438] [2020-07-21 22:41:33,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:41:33,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:41:33,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:41:33,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:41:33,120 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-07-21 22:41:33,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:41:33,333 INFO L93 Difference]: Finished difference Result 25 states and 24 transitions. [2020-07-21 22:41:33,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:41:33,337 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-21 22:41:33,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:41:33,351 INFO L225 Difference]: With dead ends: 25 [2020-07-21 22:41:33,352 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 22:41:33,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 22:41:33,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 22:41:33,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 22:41:33,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 22:41:33,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 22:41:33,411 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2020-07-21 22:41:33,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:41:33,412 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 22:41:33,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:41:33,413 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 22:41:33,413 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 22:41:33,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:41:33,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 22:41:33,783 INFO L268 CegarLoopResult]: For program point equalEXIT(lines 4 12) no Hoare annotation was computed. [2020-07-21 22:41:33,784 INFO L271 CegarLoopResult]: At program point equalENTRY(lines 4 12) the Hoare annotation is: true [2020-07-21 22:41:33,785 INFO L268 CegarLoopResult]: For program point equalFINAL(lines 4 12) no Hoare annotation was computed. [2020-07-21 22:41:33,785 INFO L264 CegarLoopResult]: At program point L6(lines 4 12) the Hoare annotation is: (or (not (= 1 (select (select |#memory_int| |~#a~0.base|) |~#a~0.offset|))) (not (= 1 (select (select |#memory_int| |~#b~0.base|) |~#b~0.offset|))) (not (= (select (select |#memory_int| |equal_#in~b.base|) |equal_#in~b.offset|) 1)) (not (= 1 (select (select |#memory_int| |equal_#in~a.base|) |equal_#in~a.offset|)))) [2020-07-21 22:41:33,785 INFO L268 CegarLoopResult]: For program point L5(lines 5 7) no Hoare annotation was computed. [2020-07-21 22:41:33,786 INFO L268 CegarLoopResult]: For program point equalErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed. [2020-07-21 22:41:33,786 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 22:41:33,787 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 22:41:33,787 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:41:33,787 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:41:33,787 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 22:41:33,787 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 22:41:33,788 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 22:41:33,788 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 17 28) the Hoare annotation is: true [2020-07-21 22:41:33,788 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 28) no Hoare annotation was computed. [2020-07-21 22:41:33,788 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (and (= 1 (select (select |#memory_int| |~#a~0.base|) |~#a~0.offset|)) (= 1 (select (select |#memory_int| |~#b~0.base|) |~#b~0.offset|))) [2020-07-21 22:41:33,788 INFO L268 CegarLoopResult]: For program point L26-1(line 26) no Hoare annotation was computed. [2020-07-21 22:41:33,788 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 28) no Hoare annotation was computed. [2020-07-21 22:41:33,806 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 22:41:33,808 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 22:41:33,808 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 22:41:33,809 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 22:41:33,820 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 22:41:33,821 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 22:41:33,821 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 22:41:33,822 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 22:41:33,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:41:33 BoogieIcfgContainer [2020-07-21 22:41:33,827 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:41:33,831 INFO L168 Benchmark]: Toolchain (without parser) took 3015.74 ms. Allocated memory was 135.3 MB in the beginning and 200.3 MB in the end (delta: 65.0 MB). Free memory was 100.0 MB in the beginning and 106.6 MB in the end (delta: -6.6 MB). Peak memory consumption was 58.4 MB. Max. memory is 7.1 GB. [2020-07-21 22:41:33,833 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 135.3 MB. Free memory was 118.4 MB in the beginning and 118.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 22:41:33,834 INFO L168 Benchmark]: CACSL2BoogieTranslator took 500.47 ms. Allocated memory is still 135.3 MB. Free memory was 99.6 MB in the beginning and 90.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 22:41:33,836 INFO L168 Benchmark]: Boogie Preprocessor took 201.36 ms. Allocated memory was 135.3 MB in the beginning and 200.3 MB in the end (delta: 65.0 MB). Free memory was 90.0 MB in the beginning and 178.5 MB in the end (delta: -88.4 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-21 22:41:33,837 INFO L168 Benchmark]: RCFGBuilder took 482.77 ms. Allocated memory is still 200.3 MB. Free memory was 178.5 MB in the beginning and 164.1 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-21 22:41:33,838 INFO L168 Benchmark]: TraceAbstraction took 1816.72 ms. Allocated memory is still 200.3 MB. Free memory was 163.4 MB in the beginning and 106.6 MB in the end (delta: 56.8 MB). Peak memory consumption was 56.8 MB. Max. memory is 7.1 GB. [2020-07-21 22:41:33,842 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 135.3 MB. Free memory was 118.4 MB in the beginning and 118.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 500.47 ms. Allocated memory is still 135.3 MB. Free memory was 99.6 MB in the beginning and 90.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 201.36 ms. Allocated memory was 135.3 MB in the beginning and 200.3 MB in the end (delta: 65.0 MB). Free memory was 90.0 MB in the beginning and 178.5 MB in the end (delta: -88.4 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 482.77 ms. Allocated memory is still 200.3 MB. Free memory was 178.5 MB in the beginning and 164.1 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1816.72 ms. Allocated memory is still 200.3 MB. Free memory was 163.4 MB in the beginning and 106.6 MB in the end (delta: 56.8 MB). Peak memory consumption was 56.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 10]: 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: 4]: Loop Invariant [2020-07-21 22:41:33,857 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 22:41:33,857 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 22:41:33,858 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 22:41:33,858 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 22:41:33,860 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 22:41:33,861 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 22:41:33,861 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 22:41:33,861 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: ((!(1 == unknown-#memory_int-unknown[a][a]) || !(1 == unknown-#memory_int-unknown[b][b])) || !(unknown-#memory_int-unknown[b][b] == 1)) || !(1 == unknown-#memory_int-unknown[a][a]) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 9 SDslu, 23 SDs, 0 SdLazy, 10 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s 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, 7 PreInvPairs, 7 NumberOfFragments, 53 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 61 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 10 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 387 SizeOfPredicates, 17 NumberOfNonLiveVariables, 131 ConjunctsInSsa, 30 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...