/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/while_infinite_loop_3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:43:43,750 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 17:43:43,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:43:43,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:43:43,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:43:43,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:43:43,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:43:43,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:43:43,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:43:43,787 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:43:43,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:43:43,789 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:43:43,790 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:43:43,791 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:43:43,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:43:43,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:43:43,795 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:43:43,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:43:43,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:43:43,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:43:43,803 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:43:43,804 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:43:43,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:43:43,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:43:43,820 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:43:43,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:43:43,822 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 [2020-07-20 17:43:43,837 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:43:43,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:43:43,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:43:43,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:43:43,839 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:43:43,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:43:43,840 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:43:43,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:43:43,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:43:43,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:43:43,841 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:43:43,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:43:43,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:43:43,841 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:43:43,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:43:43,841 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:43:43,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:43:43,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:43:43,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:43:43,842 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:43:43,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:43:43,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:43:43,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:43:43,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:43:43,843 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:43:43,843 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:43:43,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:43:43,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:43:43,844 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:43:43,844 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 17:43:44,225 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:43:44,239 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:43:44,243 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:43:44,244 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:43:44,245 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:43:44,246 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_3.c [2020-07-20 17:43:44,333 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07c982727/7755b7e32eb6498087e7fec428ad3f25/FLAGd1fe6d24b [2020-07-20 17:43:44,815 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:43:44,816 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_3.c [2020-07-20 17:43:44,823 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07c982727/7755b7e32eb6498087e7fec428ad3f25/FLAGd1fe6d24b [2020-07-20 17:43:45,175 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07c982727/7755b7e32eb6498087e7fec428ad3f25 [2020-07-20 17:43:45,187 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:43:45,190 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:43:45,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:43:45,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:43:45,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:43:45,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:43:45" (1/1) ... [2020-07-20 17:43:45,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22e11f7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:45, skipping insertion in model container [2020-07-20 17:43:45,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:43:45" (1/1) ... [2020-07-20 17:43:45,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:43:45,232 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:43:45,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:43:45,420 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:43:45,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:43:45,456 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:43:45,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:45 WrapperNode [2020-07-20 17:43:45,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:43:45,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:43:45,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:43:45,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:43:45,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:45" (1/1) ... [2020-07-20 17:43:45,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:45" (1/1) ... [2020-07-20 17:43:45,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:45" (1/1) ... [2020-07-20 17:43:45,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:45" (1/1) ... [2020-07-20 17:43:45,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:45" (1/1) ... [2020-07-20 17:43:45,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:45" (1/1) ... [2020-07-20 17:43:45,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:45" (1/1) ... [2020-07-20 17:43:45,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:43:45,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:43:45,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:43:45,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:43:45,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:45" (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 [2020-07-20 17:43:45,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:43:45,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:43:45,712 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 17:43:45,713 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-07-20 17:43:45,713 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:43:45,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:43:45,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 17:43:45,715 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-07-20 17:43:45,715 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:43:45,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:43:45,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:43:45,874 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:43:45,875 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 17:43:45,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:43:45 BoogieIcfgContainer [2020-07-20 17:43:45,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:43:45,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:43:45,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:43:45,884 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:43:45,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:43:45" (1/3) ... [2020-07-20 17:43:45,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eea1c6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:43:45, skipping insertion in model container [2020-07-20 17:43:45,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:45" (2/3) ... [2020-07-20 17:43:45,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eea1c6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:43:45, skipping insertion in model container [2020-07-20 17:43:45,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:43:45" (3/3) ... [2020-07-20 17:43:45,889 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_3.c [2020-07-20 17:43:45,901 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:43:45,908 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:43:45,924 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:43:45,950 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:43:45,950 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:43:45,950 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:43:45,951 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:43:45,951 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:43:45,951 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:43:45,951 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:43:45,951 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:43:45,974 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-20 17:43:45,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 17:43:45,981 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:43:45,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:43:45,982 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:43:45,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:43:45,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1783967560, now seen corresponding path program 1 times [2020-07-20 17:43:46,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:43:46,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256112397] [2020-07-20 17:43:46,001 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 [2020-07-20 17:43:46,078 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:43:46,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:43:46,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 17:43:46,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:43:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:43:46,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:43:46,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256112397] [2020-07-20 17:43:46,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:43:46,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 17:43:46,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560950396] [2020-07-20 17:43:46,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 17:43:46,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:43:46,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 17:43:46,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:43:46,138 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-07-20 17:43:46,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:43:46,169 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2020-07-20 17:43:46,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 17:43:46,171 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 17:43:46,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:43:46,182 INFO L225 Difference]: With dead ends: 35 [2020-07-20 17:43:46,182 INFO L226 Difference]: Without dead ends: 17 [2020-07-20 17:43:46,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:43:46,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-20 17:43:46,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-20 17:43:46,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-20 17:43:46,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-20 17:43:46,232 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2020-07-20 17:43:46,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:43:46,233 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-20 17:43:46,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 17:43:46,233 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-20 17:43:46,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 17:43:46,234 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:43:46,234 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:43:46,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:43:46,446 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:43:46,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:43:46,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1698359207, now seen corresponding path program 1 times [2020-07-20 17:43:46,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:43:46,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367150595] [2020-07-20 17:43:46,449 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 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 [2020-07-20 17:43:46,481 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:43:46,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:43:46,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:43:46,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:43:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:43:46,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:43:46,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367150595] [2020-07-20 17:43:46,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:43:46,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:43:46,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902987871] [2020-07-20 17:43:46,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:43:46,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:43:46,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:43:46,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:43:46,565 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2020-07-20 17:43:46,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:43:46,644 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-07-20 17:43:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:43:46,646 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 17:43:46,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:43:46,647 INFO L225 Difference]: With dead ends: 17 [2020-07-20 17:43:46,647 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 17:43:46,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:43:46,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 17:43:46,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 17:43:46,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 17:43:46,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 17:43:46,651 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-07-20 17:43:46,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:43:46,651 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 17:43:46,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:43:46,652 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 17:43:46,652 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 17:43:46,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:43:46,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 17:43:47,029 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 17:43:47,029 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 17:43:47,029 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:43:47,030 INFO L264 CegarLoopResult]: At program point evalENTRY(lines 12 19) the Hoare annotation is: (or (not (= 0 |old(~x~0)|)) (= 0 ~x~0)) [2020-07-20 17:43:47,030 INFO L268 CegarLoopResult]: For program point L14-1(lines 12 19) no Hoare annotation was computed. [2020-07-20 17:43:47,031 INFO L268 CegarLoopResult]: For program point evalEXIT(lines 12 19) no Hoare annotation was computed. [2020-07-20 17:43:47,031 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:43:47,032 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (= 0 ~x~0) [2020-07-20 17:43:47,032 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 17:43:47,033 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 17:43:47,034 INFO L268 CegarLoopResult]: For program point L30(line 30) no Hoare annotation was computed. [2020-07-20 17:43:47,034 INFO L264 CegarLoopResult]: At program point L27(lines 22 33) the Hoare annotation is: (or (not (= 0 |old(~x~0)|)) (= 0 ~x~0)) [2020-07-20 17:43:47,034 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (or (not (= 0 |old(~x~0)|)) (= 0 ~x~0)) [2020-07-20 17:43:47,034 INFO L264 CegarLoopResult]: At program point L26-1(line 26) the Hoare annotation is: (or (not (= 0 |old(~x~0)|)) (= 0 ~x~0)) [2020-07-20 17:43:47,035 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 22 33) no Hoare annotation was computed. [2020-07-20 17:43:47,035 INFO L264 CegarLoopResult]: At program point L24-1(lines 24 28) the Hoare annotation is: (not (= 0 |old(~x~0)|)) [2020-07-20 17:43:47,035 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 22 33) no Hoare annotation was computed. [2020-07-20 17:43:47,035 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-20 17:43:47,036 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-20 17:43:47,036 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 17:43:47,036 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-20 17:43:47,036 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-20 17:43:47,036 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-20 17:43:47,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:43:47 BoogieIcfgContainer [2020-07-20 17:43:47,047 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:43:47,052 INFO L168 Benchmark]: Toolchain (without parser) took 1861.08 ms. Allocated memory was 136.8 MB in the beginning and 202.4 MB in the end (delta: 65.5 MB). Free memory was 101.6 MB in the beginning and 128.0 MB in the end (delta: -26.4 MB). Peak memory consumption was 39.2 MB. Max. memory is 7.1 GB. [2020-07-20 17:43:47,054 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 17:43:47,056 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.07 ms. Allocated memory is still 136.8 MB. Free memory was 101.2 MB in the beginning and 91.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-20 17:43:47,059 INFO L168 Benchmark]: Boogie Preprocessor took 180.57 ms. Allocated memory was 136.8 MB in the beginning and 202.4 MB in the end (delta: 65.5 MB). Free memory was 91.9 MB in the beginning and 182.5 MB in the end (delta: -90.6 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-07-20 17:43:47,061 INFO L168 Benchmark]: RCFGBuilder took 240.21 ms. Allocated memory is still 202.4 MB. Free memory was 182.5 MB in the beginning and 170.1 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-07-20 17:43:47,063 INFO L168 Benchmark]: TraceAbstraction took 1167.03 ms. Allocated memory is still 202.4 MB. Free memory was 170.1 MB in the beginning and 128.0 MB in the end (delta: 42.1 MB). Peak memory consumption was 42.1 MB. Max. memory is 7.1 GB. [2020-07-20 17:43:47,075 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 266.07 ms. Allocated memory is still 136.8 MB. Free memory was 101.2 MB in the beginning and 91.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 180.57 ms. Allocated memory was 136.8 MB in the beginning and 202.4 MB in the end (delta: 65.5 MB). Free memory was 91.9 MB in the beginning and 182.5 MB in the end (delta: -90.6 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 240.21 ms. Allocated memory is still 202.4 MB. Free memory was 182.5 MB in the beginning and 170.1 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1167.03 ms. Allocated memory is still 202.4 MB. Free memory was 170.1 MB in the beginning and 128.0 MB in the end (delta: 42.1 MB). Peak memory consumption was 42.1 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 SDtfs, 14 SDslu, 22 SDs, 0 SdLazy, 5 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred 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, 9 LocationsWithAnnotation, 12 PreInvPairs, 15 NumberOfFragments, 42 HoareAnnotationTreeSize, 12 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 15 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 24 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 380 SizeOfPredicates, 3 NumberOfNonLiveVariables, 60 ConjunctsInSsa, 6 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...