/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/ldv-regression/test16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 13:40:56,887 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 13:40:56,968 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 13:40:56,998 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 13:40:56,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 13:40:57,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 13:40:57,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 13:40:57,001 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 13:40:57,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 13:40:57,001 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 13:40:57,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 13:40:57,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 13:40:57,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 13:40:57,003 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 13:40:57,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 13:40:57,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 13:40:57,004 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 13:40:57,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 13:40:57,004 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 13:40:57,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 13:40:57,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 13:40:57,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 13:40:57,005 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 13:40:57,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 13:40:57,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:40:57,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 13:40:57,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 13:40:57,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 13:40:57,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 13:40:57,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:40:57,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 13:40:57,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 13:40:57,007 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 13:40:57,275 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 13:40:57,290 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 13:40:57,294 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 13:40:57,296 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 13:40:57,296 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 13:40:57,297 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test16.c [2020-07-21 13:40:57,371 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c896618f/08541773af4247378160302404a57222/FLAG9d41eb9fc [2020-07-21 13:40:57,815 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 13:40:57,816 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test16.c [2020-07-21 13:40:57,823 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c896618f/08541773af4247378160302404a57222/FLAG9d41eb9fc [2020-07-21 13:40:58,170 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c896618f/08541773af4247378160302404a57222 [2020-07-21 13:40:58,180 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 13:40:58,183 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 13:40:58,184 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 13:40:58,184 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 13:40:58,188 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 13:40:58,189 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:40:58" (1/1) ... [2020-07-21 13:40:58,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48d86fdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:58, skipping insertion in model container [2020-07-21 13:40:58,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:40:58" (1/1) ... [2020-07-21 13:40:58,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 13:40:58,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 13:40:58,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:40:58,404 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 13:40:58,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:40:58,429 INFO L208 MainTranslator]: Completed translation [2020-07-21 13:40:58,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:58 WrapperNode [2020-07-21 13:40:58,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 13:40:58,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 13:40:58,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 13:40:58,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 13:40:58,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:58" (1/1) ... [2020-07-21 13:40:58,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:58" (1/1) ... [2020-07-21 13:40:58,536 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:58" (1/1) ... [2020-07-21 13:40:58,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:58" (1/1) ... [2020-07-21 13:40:58,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:58" (1/1) ... [2020-07-21 13:40:58,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:58" (1/1) ... [2020-07-21 13:40:58,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:58" (1/1) ... [2020-07-21 13:40:58,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 13:40:58,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 13:40:58,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 13:40:58,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 13:40:58,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:58" (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 13:40:58,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 13:40:58,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 13:40:58,600 INFO L138 BoogieDeclarations]: Found implementation of procedure equal [2020-07-21 13:40:58,600 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 13:40:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 13:40:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure equal [2020-07-21 13:40:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 13:40:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 13:40:58,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 13:40:58,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 13:40:58,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 13:40:58,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-21 13:40:58,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 13:40:58,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 13:40:58,806 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 13:40:58,806 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 13:40:58,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:40:58 BoogieIcfgContainer [2020-07-21 13:40:58,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 13:40:58,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 13:40:58,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 13:40:58,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 13:40:58,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:40:58" (1/3) ... [2020-07-21 13:40:58,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a15068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:40:58, skipping insertion in model container [2020-07-21 13:40:58,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:40:58" (2/3) ... [2020-07-21 13:40:58,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a15068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:40:58, skipping insertion in model container [2020-07-21 13:40:58,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:40:58" (3/3) ... [2020-07-21 13:40:58,819 INFO L109 eAbstractionObserver]: Analyzing ICFG test16.c [2020-07-21 13:40:58,829 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 13:40:58,836 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 13:40:58,857 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 13:40:58,885 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 13:40:58,885 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 13:40:58,885 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 13:40:58,885 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 13:40:58,886 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 13:40:58,886 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 13:40:58,886 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 13:40:58,886 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 13:40:58,909 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-07-21 13:40:58,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 13:40:58,915 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:40:58,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:40:58,917 INFO L427 AbstractCegarLoop]: === Iteration 1 === [equalErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:40:58,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:40:58,923 INFO L82 PathProgramCache]: Analyzing trace with hash 390654600, now seen corresponding path program 1 times [2020-07-21 13:40:58,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:40:58,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952386488] [2020-07-21 13:40:58,934 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 13:40:59,051 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:40:59,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:40:59,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-21 13:40:59,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:40:59,130 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2020-07-21 13:40:59,134 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-21 13:40:59,171 INFO L624 ElimStorePlain]: treesize reduction 14, result has 22.2 percent of original size [2020-07-21 13:40:59,171 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:40:59,172 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:4 [2020-07-21 13:40:59,201 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 15 [2020-07-21 13:40:59,202 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:40:59,213 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:40:59,214 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:40:59,215 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:64, output treesize:19 [2020-07-21 13:40:59,274 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2020-07-21 13:40:59,276 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:40:59,284 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:40:59,286 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 13:40:59,286 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:33, output treesize:7 [2020-07-21 13:40:59,301 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 13:40:59,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:40:59,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952386488] [2020-07-21 13:40:59,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:40:59,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 13:40:59,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239390132] [2020-07-21 13:40:59,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 13:40:59,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:40:59,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 13:40:59,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 13:40:59,329 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 6 states. [2020-07-21 13:40:59,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:40:59,439 INFO L93 Difference]: Finished difference Result 25 states and 24 transitions. [2020-07-21 13:40:59,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 13:40:59,441 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-07-21 13:40:59,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:40:59,448 INFO L225 Difference]: With dead ends: 25 [2020-07-21 13:40:59,449 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 13:40:59,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 13:40:59,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 13:40:59,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 13:40:59,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 13:40:59,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 13:40:59,478 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2020-07-21 13:40:59,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:40:59,479 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 13:40:59,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 13:40:59,479 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 13:40:59,479 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 13:40:59,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:40:59,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 13:40:59,815 INFO L268 CegarLoopResult]: For program point equalEXIT(lines 4 12) no Hoare annotation was computed. [2020-07-21 13:40:59,815 INFO L271 CegarLoopResult]: At program point equalENTRY(lines 4 12) the Hoare annotation is: true [2020-07-21 13:40:59,816 INFO L268 CegarLoopResult]: For program point equalFINAL(lines 4 12) no Hoare annotation was computed. [2020-07-21 13:40:59,816 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|))) (= |~#a~0.base| |~#b~0.base|) (not (= (select (select |#memory_int| |equal_#in~b.base|) |equal_#in~b.offset|) 1)) (= |equal_#in~a.base| |equal_#in~b.base|) (not (= 1 (select (select |#memory_int| |equal_#in~a.base|) |equal_#in~a.offset|)))) [2020-07-21 13:40:59,816 INFO L268 CegarLoopResult]: For program point L5(lines 5 7) no Hoare annotation was computed. [2020-07-21 13:40:59,817 INFO L268 CegarLoopResult]: For program point equalErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed. [2020-07-21 13:40:59,817 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 13:40:59,817 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 13:40:59,818 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 13:40:59,818 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 13:40:59,818 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (not (= |~#b~0.base| |~#a~0.base|)) [2020-07-21 13:40:59,818 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 13:40:59,819 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 13:40:59,819 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 17 28) the Hoare annotation is: true [2020-07-21 13:40:59,819 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 28) no Hoare annotation was computed. [2020-07-21 13:40:59,820 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (or (and (= 1 (select (select |#memory_int| |~#a~0.base|) |~#a~0.offset|)) (= 1 (select (select |#memory_int| |~#b~0.base|) |~#b~0.offset|))) (= |~#b~0.base| |~#a~0.base|)) [2020-07-21 13:40:59,820 INFO L268 CegarLoopResult]: For program point L26-1(line 26) no Hoare annotation was computed. [2020-07-21 13:40:59,820 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 28) no Hoare annotation was computed. [2020-07-21 13:40:59,843 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 13:40:59,844 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 13:40:59,845 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 13:40:59,846 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 13:40:59,853 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 13:40:59,853 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 13:40:59,854 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 13:40:59,856 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 13:40:59,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:40:59 BoogieIcfgContainer [2020-07-21 13:40:59,861 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 13:40:59,865 INFO L168 Benchmark]: Toolchain (without parser) took 1681.66 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 102.1 MB in the beginning and 106.4 MB in the end (delta: -4.3 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2020-07-21 13:40:59,867 INFO L168 Benchmark]: CDTParser took 0.49 ms. Allocated memory is still 145.8 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 13:40:59,869 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.23 ms. Allocated memory is still 145.8 MB. Free memory was 101.6 MB in the beginning and 92.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 13:40:59,872 INFO L168 Benchmark]: Boogie Preprocessor took 115.16 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 92.1 MB in the beginning and 181.6 MB in the end (delta: -89.5 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-21 13:40:59,876 INFO L168 Benchmark]: RCFGBuilder took 263.90 ms. Allocated memory is still 202.9 MB. Free memory was 181.6 MB in the beginning and 167.1 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-21 13:40:59,877 INFO L168 Benchmark]: TraceAbstraction took 1050.17 ms. Allocated memory is still 202.9 MB. Free memory was 166.5 MB in the beginning and 106.4 MB in the end (delta: 60.1 MB). Peak memory consumption was 60.1 MB. Max. memory is 7.1 GB. [2020-07-21 13:40:59,888 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49 ms. Allocated memory is still 145.8 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 246.23 ms. Allocated memory is still 145.8 MB. Free memory was 101.6 MB in the beginning and 92.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.16 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 92.1 MB in the beginning and 181.6 MB in the end (delta: -89.5 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 263.90 ms. Allocated memory is still 202.9 MB. Free memory was 181.6 MB in the beginning and 167.1 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1050.17 ms. Allocated memory is still 202.9 MB. Free memory was 166.5 MB in the beginning and 106.4 MB in the end (delta: 60.1 MB). Peak memory consumption was 60.1 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 13:40:59,910 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 13:40:59,915 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 13:40:59,915 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 13:40:59,915 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 13:40:59,916 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 13:40:59,916 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 13:40:59,917 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 13:40:59,917 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])) || a == b) || !(unknown-#memory_int-unknown[b][b] == 1)) || a == b) || !(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: 0.8s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 10 SDslu, 21 SDs, 0 SdLazy, 14 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 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, 7 PreInvPairs, 7 NumberOfFragments, 66 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 86 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 10 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 567 SizeOfPredicates, 17 NumberOfNonLiveVariables, 65 ConjunctsInSsa, 31 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...