/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/terminator_02-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:42:47,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:42:47,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:42:47,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:42:47,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:42:47,681 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:42:47,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:42:47,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:42:47,687 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:42:47,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:42:47,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:42:47,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:42:47,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:42:47,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:42:47,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:42:47,694 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:42:47,695 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:42:47,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:42:47,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:42:47,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:42:47,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:42:47,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:42:47,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:42:47,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:42:47,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:42:47,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:42:47,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:42:47,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:42:47,716 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 17:42:47,732 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:42:47,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:42:47,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:42:47,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:42:47,735 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:42:47,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:42:47,735 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:42:47,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:42:47,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:42:47,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:42:47,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:42:47,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:42:47,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:42:47,737 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:42:47,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:42:47,737 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:42:47,737 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:42:47,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:42:47,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:42:47,738 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:42:47,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:42:47,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:42:47,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:42:47,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:42:47,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:42:47,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:42:47,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:42:47,741 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:42:47,741 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:42:47,741 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 17:42:48,074 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:42:48,088 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:42:48,092 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:42:48,094 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:42:48,094 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:42:48,095 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_02-2.c [2020-07-20 17:42:48,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00a668a7c/abf3e365c4f54f869c95390afdc9a411/FLAG36f3c9831 [2020-07-20 17:42:48,705 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:42:48,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_02-2.c [2020-07-20 17:42:48,713 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00a668a7c/abf3e365c4f54f869c95390afdc9a411/FLAG36f3c9831 [2020-07-20 17:42:49,088 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00a668a7c/abf3e365c4f54f869c95390afdc9a411 [2020-07-20 17:42:49,096 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:42:49,099 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:42:49,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:42:49,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:42:49,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:42:49,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:42:49" (1/1) ... [2020-07-20 17:42:49,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@143da84a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:49, skipping insertion in model container [2020-07-20 17:42:49,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:42:49" (1/1) ... [2020-07-20 17:42:49,116 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:42:49,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:42:49,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:42:49,339 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:42:49,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:42:49,373 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:42:49,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:49 WrapperNode [2020-07-20 17:42:49,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:42:49,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:42:49,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:42:49,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:42:49,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:49" (1/1) ... [2020-07-20 17:42:49,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:49" (1/1) ... [2020-07-20 17:42:49,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:49" (1/1) ... [2020-07-20 17:42:49,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:49" (1/1) ... [2020-07-20 17:42:49,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:49" (1/1) ... [2020-07-20 17:42:49,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:49" (1/1) ... [2020-07-20 17:42:49,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:49" (1/1) ... [2020-07-20 17:42:49,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:42:49,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:42:49,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:42:49,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:42:49,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:49" (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 17:42:49,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:42:49,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:42:49,561 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 17:42:49,561 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 17:42:49,562 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:42:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:42:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:42:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 17:42:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 17:42:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:42:49,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 17:42:49,563 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:42:49,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:42:49,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:42:49,793 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:42:49,793 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 17:42:49,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:42:49 BoogieIcfgContainer [2020-07-20 17:42:49,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:42:49,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:42:49,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:42:49,813 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:42:49,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:42:49" (1/3) ... [2020-07-20 17:42:49,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e8571d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:42:49, skipping insertion in model container [2020-07-20 17:42:49,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:49" (2/3) ... [2020-07-20 17:42:49,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e8571d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:42:49, skipping insertion in model container [2020-07-20 17:42:49,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:42:49" (3/3) ... [2020-07-20 17:42:49,832 INFO L109 eAbstractionObserver]: Analyzing ICFG terminator_02-2.c [2020-07-20 17:42:49,866 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:42:49,884 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:42:49,916 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:42:49,945 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:42:49,945 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:42:49,946 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:42:49,946 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:42:49,946 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:42:49,946 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:42:49,946 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:42:49,947 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:42:49,964 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-20 17:42:49,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 17:42:49,970 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:42:49,971 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:42:49,971 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:42:49,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:42:49,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1447361753, now seen corresponding path program 1 times [2020-07-20 17:42:49,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:42:49,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991870305] [2020-07-20 17:42:49,985 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 17:42:50,066 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:42:50,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:42:50,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:42:50,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:42:50,163 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:42:50,165 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:42:50,193 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 17:42:50,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:42:50,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991870305] [2020-07-20 17:42:50,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:42:50,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 17:42:50,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386707574] [2020-07-20 17:42:50,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 17:42:50,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:42:50,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 17:42:50,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:42:50,219 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 6 states. [2020-07-20 17:42:50,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:42:50,382 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2020-07-20 17:42:50,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:42:50,385 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-07-20 17:42:50,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:42:50,397 INFO L225 Difference]: With dead ends: 46 [2020-07-20 17:42:50,398 INFO L226 Difference]: Without dead ends: 17 [2020-07-20 17:42:50,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:42:50,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-20 17:42:50,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-20 17:42:50,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-20 17:42:50,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-07-20 17:42:50,446 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-07-20 17:42:50,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:42:50,447 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-07-20 17:42:50,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 17:42:50,448 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-07-20 17:42:50,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 17:42:50,448 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:42:50,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:42:50,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:42:50,666 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:42:50,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:42:50,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1757797730, now seen corresponding path program 1 times [2020-07-20 17:42:50,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:42:50,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744673924] [2020-07-20 17:42:50,668 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 17:42:50,701 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:42:50,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:42:50,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 17:42:50,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:42:50,757 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:42:50,763 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:42:50,766 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:42:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:42:50,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:42:50,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744673924] [2020-07-20 17:42:50,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:42:50,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 17:42:50,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508448501] [2020-07-20 17:42:50,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 17:42:50,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:42:50,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 17:42:50,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:42:50,812 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 7 states. [2020-07-20 17:42:50,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:42:50,903 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2020-07-20 17:42:50,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:42:50,903 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-07-20 17:42:50,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:42:50,904 INFO L225 Difference]: With dead ends: 19 [2020-07-20 17:42:50,904 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 17:42:50,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-20 17:42:50,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 17:42:50,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 17:42:50,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 17:42:50,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 17:42:50,907 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-07-20 17:42:50,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:42:50,908 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 17:42:50,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 17:42:50,908 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 17:42:50,908 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 17:42:51,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:42:51,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 17:42:51,211 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 17:42:51,211 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:42:51,211 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:42:51,211 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 17:42:51,212 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 17:42:51,212 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 17:42:51,212 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-07-20 17:42:51,214 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 17:42:51,214 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-07-20 17:42:51,214 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-07-20 17:42:51,215 INFO L268 CegarLoopResult]: For program point L27(lines 27 32) no Hoare annotation was computed. [2020-07-20 17:42:51,215 INFO L264 CegarLoopResult]: At program point L27-2(lines 24 33) the Hoare annotation is: (or (<= main_~x~0 98) (< 100 main_~z~0)) [2020-07-20 17:42:51,215 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 38) no Hoare annotation was computed. [2020-07-20 17:42:51,215 INFO L268 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-07-20 17:42:51,215 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-07-20 17:42:51,216 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 38) no Hoare annotation was computed. [2020-07-20 17:42:51,216 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 16 38) the Hoare annotation is: true [2020-07-20 17:42:51,216 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-07-20 17:42:51,216 INFO L264 CegarLoopResult]: At program point L24-2(lines 24 33) the Hoare annotation is: (or (and (<= main_~x~0 98) (<= main_~z~0 100)) (and (<= 100 main_~x~0) (< 100 main_~z~0))) [2020-07-20 17:42:51,216 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-07-20 17:42:51,217 INFO L268 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2020-07-20 17:42:51,217 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 7 12) the Hoare annotation is: true [2020-07-20 17:42:51,217 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 7 12) no Hoare annotation was computed. [2020-07-20 17:42:51,219 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-07-20 17:42:51,219 INFO L268 CegarLoopResult]: For program point L8(lines 8 10) no Hoare annotation was computed. [2020-07-20 17:42:51,219 INFO L268 CegarLoopResult]: For program point L8-2(lines 7 12) no Hoare annotation was computed. [2020-07-20 17:42:51,219 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2020-07-20 17:42:51,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:42:51 BoogieIcfgContainer [2020-07-20 17:42:51,249 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:42:51,253 INFO L168 Benchmark]: Toolchain (without parser) took 2152.89 ms. Allocated memory was 135.8 MB in the beginning and 199.2 MB in the end (delta: 63.4 MB). Free memory was 99.2 MB in the beginning and 104.5 MB in the end (delta: -5.3 MB). Peak memory consumption was 58.2 MB. Max. memory is 7.1 GB. [2020-07-20 17:42:51,255 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 135.8 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 17:42:51,257 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.53 ms. Allocated memory is still 135.8 MB. Free memory was 98.8 MB in the beginning and 89.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-20 17:42:51,260 INFO L168 Benchmark]: Boogie Preprocessor took 123.68 ms. Allocated memory was 135.8 MB in the beginning and 199.2 MB in the end (delta: 63.4 MB). Free memory was 89.2 MB in the beginning and 179.2 MB in the end (delta: -90.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-20 17:42:51,261 INFO L168 Benchmark]: RCFGBuilder took 308.81 ms. Allocated memory is still 199.2 MB. Free memory was 179.2 MB in the beginning and 163.5 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. [2020-07-20 17:42:51,262 INFO L168 Benchmark]: TraceAbstraction took 1439.82 ms. Allocated memory is still 199.2 MB. Free memory was 163.5 MB in the beginning and 104.5 MB in the end (delta: 59.0 MB). Peak memory consumption was 59.0 MB. Max. memory is 7.1 GB. [2020-07-20 17:42:51,273 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 135.8 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 274.53 ms. Allocated memory is still 135.8 MB. Free memory was 98.8 MB in the beginning and 89.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.68 ms. Allocated memory was 135.8 MB in the beginning and 199.2 MB in the end (delta: 63.4 MB). Free memory was 89.2 MB in the beginning and 179.2 MB in the end (delta: -90.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 308.81 ms. Allocated memory is still 199.2 MB. Free memory was 179.2 MB in the beginning and 163.5 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1439.82 ms. Allocated memory is still 199.2 MB. Free memory was 163.5 MB in the beginning and 104.5 MB in the end (delta: 59.0 MB). Peak memory consumption was 59.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: 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: 24]: Loop Invariant Derived loop invariant: x <= 98 || 100 < z - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 36 SDtfs, 16 SDslu, 104 SDs, 0 SdLazy, 71 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s 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, 7 LocationsWithAnnotation, 9 PreInvPairs, 13 NumberOfFragments, 27 HoareAnnotationTreeSize, 9 FomulaSimplifications, 7 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 786 SizeOfPredicates, 4 NumberOfNonLiveVariables, 74 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 1/1 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...