/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/const.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:31:39,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:31:39,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:31:39,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:31:39,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:31:39,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:31:39,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:31:39,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:31:39,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:31:39,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:31:39,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:31:39,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:31:39,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:31:39,088 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:31:39,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:31:39,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:31:39,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:31:39,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:31:39,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:31:39,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:31:39,098 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:31:39,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:31:39,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:31:39,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:31:39,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 14:31:39,111 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:31:39,112 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:31:39,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:31:39,114 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 14:31:39,128 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:31:39,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:31:39,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:31:39,130 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:31:39,130 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:31:39,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:31:39,131 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:31:39,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:31:39,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:31:39,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:31:39,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:31:39,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:31:39,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:31:39,132 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:31:39,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:31:39,132 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:31:39,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:31:39,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:31:39,133 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:31:39,133 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:31:39,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:31:39,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:31:39,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:31:39,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:31:39,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:31:39,134 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:31:39,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:31:39,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:31:39,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:31:39,135 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 14:31:39,430 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:31:39,445 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:31:39,450 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:31:39,452 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:31:39,452 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:31:39,452 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/const.c [2020-07-21 14:31:39,528 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ae90a8e4/b7dbcf77a5fe470f869a97b650b4a6a6/FLAG3e5f209df [2020-07-21 14:31:40,000 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:31:40,001 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/const.c [2020-07-21 14:31:40,007 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ae90a8e4/b7dbcf77a5fe470f869a97b650b4a6a6/FLAG3e5f209df [2020-07-21 14:31:40,373 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ae90a8e4/b7dbcf77a5fe470f869a97b650b4a6a6 [2020-07-21 14:31:40,382 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:31:40,384 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:31:40,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:31:40,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:31:40,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:31:40,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:31:40" (1/1) ... [2020-07-21 14:31:40,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fdde1fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:40, skipping insertion in model container [2020-07-21 14:31:40,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:31:40" (1/1) ... [2020-07-21 14:31:40,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:31:40,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:31:40,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:31:40,596 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:31:40,612 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:31:40,627 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:31:40,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:40 WrapperNode [2020-07-21 14:31:40,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:31:40,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:31:40,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:31:40,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:31:40,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:40" (1/1) ... [2020-07-21 14:31:40,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:40" (1/1) ... [2020-07-21 14:31:40,645 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:40" (1/1) ... [2020-07-21 14:31:40,645 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:40" (1/1) ... [2020-07-21 14:31:40,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:40" (1/1) ... [2020-07-21 14:31:40,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:40" (1/1) ... [2020-07-21 14:31:40,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:40" (1/1) ... [2020-07-21 14:31:40,737 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:31:40,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:31:40,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:31:40,739 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:31:40,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:40" (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 14:31:40,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:31:40,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:31:40,809 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 14:31:40,809 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:31:40,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:31:40,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 14:31:40,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 14:31:40,810 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:31:40,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:31:40,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:31:40,986 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:31:40,986 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 14:31:40,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:31:40 BoogieIcfgContainer [2020-07-21 14:31:40,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:31:40,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:31:40,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:31:40,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:31:40,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:31:40" (1/3) ... [2020-07-21 14:31:40,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4636d344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:31:40, skipping insertion in model container [2020-07-21 14:31:40,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:40" (2/3) ... [2020-07-21 14:31:40,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4636d344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:31:40, skipping insertion in model container [2020-07-21 14:31:40,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:31:40" (3/3) ... [2020-07-21 14:31:40,997 INFO L109 eAbstractionObserver]: Analyzing ICFG const.c [2020-07-21 14:31:41,008 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:31:41,015 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:31:41,029 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:31:41,052 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:31:41,053 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:31:41,053 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:31:41,053 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:31:41,053 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:31:41,053 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:31:41,053 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:31:41,054 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:31:41,072 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 14:31:41,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 14:31:41,078 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:31:41,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:31:41,079 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:31:41,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:31:41,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1311776583, now seen corresponding path program 1 times [2020-07-21 14:31:41,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:31:41,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971742746] [2020-07-21 14:31:41,092 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 14:31:41,186 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:31:41,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:31:41,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:31:41,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:31:41,242 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 14:31:41,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:31:41,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971742746] [2020-07-21 14:31:41,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:31:41,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:31:41,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956867327] [2020-07-21 14:31:41,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:31:41,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:31:41,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:31:41,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:31:41,282 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2020-07-21 14:31:41,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:31:41,315 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2020-07-21 14:31:41,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:31:41,317 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-07-21 14:31:41,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:31:41,327 INFO L225 Difference]: With dead ends: 35 [2020-07-21 14:31:41,327 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 14:31:41,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:31:41,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 14:31:41,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 14:31:41,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 14:31:41,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-21 14:31:41,380 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-07-21 14:31:41,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:31:41,380 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-21 14:31:41,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:31:41,381 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-21 14:31:41,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 14:31:41,385 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:31:41,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:31:41,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:31:41,594 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:31:41,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:31:41,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1254518281, now seen corresponding path program 1 times [2020-07-21 14:31:41,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:31:41,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831770838] [2020-07-21 14:31:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:31:41,628 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:31:41,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:31:41,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:31:41,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:31:41,654 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:31:41,725 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 14:31:41,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:31:41,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831770838] [2020-07-21 14:31:41,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:31:41,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:31:41,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074463357] [2020-07-21 14:31:41,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:31:41,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:31:41,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:31:41,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:31:41,730 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-21 14:31:41,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:31:41,772 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2020-07-21 14:31:41,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:31:41,773 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-21 14:31:41,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:31:41,774 INFO L225 Difference]: With dead ends: 15 [2020-07-21 14:31:41,774 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 14:31:41,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 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 14:31:41,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 14:31:41,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 14:31:41,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 14:31:41,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 14:31:41,777 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2020-07-21 14:31:41,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:31:41,777 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 14:31:41,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:31:41,778 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 14:31:41,778 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 14:31:41,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:31:41,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 14:31:42,062 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 14:31:42,062 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 14:31:42,064 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 14:31:42,064 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 14:31:42,064 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 14:31:42,064 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 14:31:42,065 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 20) no Hoare annotation was computed. [2020-07-21 14:31:42,065 INFO L264 CegarLoopResult]: At program point L15(lines 11 18) the Hoare annotation is: (= 0 main_~s~0) [2020-07-21 14:31:42,065 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 9 20) no Hoare annotation was computed. [2020-07-21 14:31:42,068 INFO L268 CegarLoopResult]: For program point L11-2(lines 11 18) no Hoare annotation was computed. [2020-07-21 14:31:42,068 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 20) the Hoare annotation is: true [2020-07-21 14:31:42,068 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (= 0 main_~s~0) [2020-07-21 14:31:42,069 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-07-21 14:31:42,069 INFO L268 CegarLoopResult]: For program point L12-2(lines 11 18) no Hoare annotation was computed. [2020-07-21 14:31:42,069 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-21 14:31:42,069 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-21 14:31:42,069 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 14:31:42,070 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-21 14:31:42,070 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-21 14:31:42,070 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-21 14:31:42,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 02:31:42 BoogieIcfgContainer [2020-07-21 14:31:42,085 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 14:31:42,088 INFO L168 Benchmark]: Toolchain (without parser) took 1703.74 ms. Allocated memory was 135.3 MB in the beginning and 199.2 MB in the end (delta: 64.0 MB). Free memory was 100.5 MB in the beginning and 126.5 MB in the end (delta: -25.9 MB). Peak memory consumption was 38.0 MB. Max. memory is 7.1 GB. [2020-07-21 14:31:42,090 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 135.3 MB. Free memory was 118.3 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 14:31:42,091 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.56 ms. Allocated memory is still 135.3 MB. Free memory was 100.1 MB in the beginning and 90.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-21 14:31:42,092 INFO L168 Benchmark]: Boogie Preprocessor took 108.44 ms. Allocated memory was 135.3 MB in the beginning and 199.2 MB in the end (delta: 64.0 MB). Free memory was 90.7 MB in the beginning and 179.3 MB in the end (delta: -88.5 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-07-21 14:31:42,093 INFO L168 Benchmark]: RCFGBuilder took 250.97 ms. Allocated memory is still 199.2 MB. Free memory was 179.3 MB in the beginning and 166.7 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-07-21 14:31:42,094 INFO L168 Benchmark]: TraceAbstraction took 1095.06 ms. Allocated memory is still 199.2 MB. Free memory was 166.0 MB in the beginning and 126.5 MB in the end (delta: 39.6 MB). Peak memory consumption was 39.6 MB. Max. memory is 7.1 GB. [2020-07-21 14:31:42,098 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 135.3 MB. Free memory was 118.3 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 242.56 ms. Allocated memory is still 135.3 MB. Free memory was 100.1 MB in the beginning and 90.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.44 ms. Allocated memory was 135.3 MB in the beginning and 199.2 MB in the end (delta: 64.0 MB). Free memory was 90.7 MB in the beginning and 179.3 MB in the end (delta: -88.5 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 250.97 ms. Allocated memory is still 199.2 MB. Free memory was 179.3 MB in the beginning and 166.7 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1095.06 ms. Allocated memory is still 199.2 MB. Free memory was 166.0 MB in the beginning and 126.5 MB in the end (delta: 39.6 MB). Peak memory consumption was 39.6 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: 11]: Loop Invariant Derived loop invariant: 0 == s - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 30 SDtfs, 13 SDslu, 35 SDs, 0 SdLazy, 11 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 8 PreInvPairs, 10 NumberOfFragments, 11 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 12 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 418 SizeOfPredicates, 2 NumberOfNonLiveVariables, 51 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...