/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 DAGSIZE --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/trex04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:17:45,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:17:45,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:17:45,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:17:45,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:17:45,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:17:45,839 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:17:45,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:17:45,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:17:45,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:17:45,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:17:45,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:17:45,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:17:45,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:17:45,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:17:45,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:17:45,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:17:45,860 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:17:45,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:17:45,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:17:45,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:17:45,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:17:45,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:17:45,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:17:45,869 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:17:45,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:17:45,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:17:45,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:17:45,878 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 22:17:45,892 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:17:45,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:17:45,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:17:45,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:17:45,893 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:17:45,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:17:45,894 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:17:45,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:17:45,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:17:45,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:17:45,895 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:17:45,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:17:45,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:17:45,895 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:17:45,896 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:17:45,896 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:17:45,896 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:17:45,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:17:45,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:17:45,897 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:17:45,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:17:45,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:17:45,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:17:45,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:17:45,898 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:17:45,898 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:17:45,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:17:45,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:17:45,898 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:17:45,899 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 -> DAGSIZE 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 22:17:46,166 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:17:46,181 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:17:46,185 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:17:46,187 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:17:46,187 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:17:46,188 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex04.c [2020-07-20 22:17:46,263 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8c26140b/2202a90caf0843099320e75434516656/FLAG8141aebf5 [2020-07-20 22:17:46,734 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:17:46,735 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex04.c [2020-07-20 22:17:46,741 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8c26140b/2202a90caf0843099320e75434516656/FLAG8141aebf5 [2020-07-20 22:17:47,088 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8c26140b/2202a90caf0843099320e75434516656 [2020-07-20 22:17:47,098 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:17:47,101 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:17:47,102 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:17:47,102 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:17:47,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:17:47,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:17:47" (1/1) ... [2020-07-20 22:17:47,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27edf361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:47, skipping insertion in model container [2020-07-20 22:17:47,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:17:47" (1/1) ... [2020-07-20 22:17:47,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:17:47,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:17:47,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:17:47,329 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:17:47,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:17:47,358 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:17:47,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:47 WrapperNode [2020-07-20 22:17:47,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:17:47,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:17:47,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:17:47,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:17:47,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:47" (1/1) ... [2020-07-20 22:17:47,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:47" (1/1) ... [2020-07-20 22:17:47,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:47" (1/1) ... [2020-07-20 22:17:47,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:47" (1/1) ... [2020-07-20 22:17:47,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:47" (1/1) ... [2020-07-20 22:17:47,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:47" (1/1) ... [2020-07-20 22:17:47,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:47" (1/1) ... [2020-07-20 22:17:47,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:17:47,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:17:47,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:17:47,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:17:47,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:47" (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 22:17:47,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:17:47,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:17:47,529 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:17:47,529 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:17:47,529 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-07-20 22:17:47,529 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:17:47,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:17:47,531 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:17:47,531 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:17:47,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:17:47,532 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 22:17:47,532 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:17:47,532 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-07-20 22:17:47,532 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:17:47,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:17:47,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:17:47,790 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:17:47,790 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 22:17:47,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:17:47 BoogieIcfgContainer [2020-07-20 22:17:47,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:17:47,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:17:47,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:17:47,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:17:47,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:17:47" (1/3) ... [2020-07-20 22:17:47,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16253969 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:17:47, skipping insertion in model container [2020-07-20 22:17:47,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:17:47" (2/3) ... [2020-07-20 22:17:47,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16253969 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:17:47, skipping insertion in model container [2020-07-20 22:17:47,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:17:47" (3/3) ... [2020-07-20 22:17:47,823 INFO L109 eAbstractionObserver]: Analyzing ICFG trex04.c [2020-07-20 22:17:47,839 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:17:47,844 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:17:47,855 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:17:47,876 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:17:47,877 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:17:47,877 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:17:47,877 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:17:47,877 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:17:47,877 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:17:47,877 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:17:47,877 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:17:47,895 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-07-20 22:17:47,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 22:17:47,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:17:47,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:17:47,903 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:17:47,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:17:47,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1434576833, now seen corresponding path program 1 times [2020-07-20 22:17:47,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:17:47,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584020839] [2020-07-20 22:17:47,919 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 22:17:47,997 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:17:47,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:17:48,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 22:17:48,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:17:48,022 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 22:17:48,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:17:48,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584020839] [2020-07-20 22:17:48,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:17:48,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 22:17:48,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677877615] [2020-07-20 22:17:48,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 22:17:48,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:17:48,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 22:17:48,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 22:17:48,047 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-07-20 22:17:48,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:17:48,070 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-20 22:17:48,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 22:17:48,071 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-07-20 22:17:48,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:17:48,078 INFO L225 Difference]: With dead ends: 41 [2020-07-20 22:17:48,078 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 22:17:48,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 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 22:17:48,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 22:17:48,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 22:17:48,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 22:17:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2020-07-20 22:17:48,117 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 16 [2020-07-20 22:17:48,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:17:48,118 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2020-07-20 22:17:48,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 22:17:48,118 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2020-07-20 22:17:48,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 22:17:48,120 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:17:48,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:17:48,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:17:48,321 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:17:48,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:17:48,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1438270917, now seen corresponding path program 1 times [2020-07-20 22:17:48,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:17:48,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675657738] [2020-07-20 22:17:48,325 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 22:17:48,379 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:17:48,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:17:48,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:17:48,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:17:48,417 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:17:48,439 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 22:17:48,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:17:48,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675657738] [2020-07-20 22:17:48,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:17:48,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:17:48,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709739977] [2020-07-20 22:17:48,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:17:48,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:17:48,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:17:48,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:17:48,446 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 5 states. [2020-07-20 22:17:48,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:17:48,482 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2020-07-20 22:17:48,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:17:48,482 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-20 22:17:48,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:17:48,483 INFO L225 Difference]: With dead ends: 24 [2020-07-20 22:17:48,483 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 22:17:48,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:17:48,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 22:17:48,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 22:17:48,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 22:17:48,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 22:17:48,486 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-07-20 22:17:48,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:17:48,487 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 22:17:48,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:17:48,487 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 22:17:48,488 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 22:17:48,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:17:48,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 22:17:48,754 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 22:17:48,754 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:17:48,755 INFO L268 CegarLoopResult]: For program point fooEXIT(lines 16 23) no Hoare annotation was computed. [2020-07-20 22:17:48,755 INFO L271 CegarLoopResult]: At program point fooENTRY(lines 16 23) the Hoare annotation is: true [2020-07-20 22:17:48,755 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-07-20 22:17:48,755 INFO L268 CegarLoopResult]: For program point L21-1(lines 16 23) no Hoare annotation was computed. [2020-07-20 22:17:48,755 INFO L268 CegarLoopResult]: For program point L20-2(lines 17 23) no Hoare annotation was computed. [2020-07-20 22:17:48,756 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:17:48,756 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 22:17:48,756 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 22:17:48,756 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 22:17:48,756 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-20 22:17:48,756 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-20 22:17:48,756 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-20 22:17:48,757 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-20 22:17:48,757 INFO L271 CegarLoopResult]: At program point L33(line 33) the Hoare annotation is: true [2020-07-20 22:17:48,757 INFO L268 CegarLoopResult]: For program point L33-2(line 33) no Hoare annotation was computed. [2020-07-20 22:17:48,757 INFO L268 CegarLoopResult]: For program point L29(line 29) no Hoare annotation was computed. [2020-07-20 22:17:48,757 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 46) no Hoare annotation was computed. [2020-07-20 22:17:48,758 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 46) no Hoare annotation was computed. [2020-07-20 22:17:48,758 INFO L268 CegarLoopResult]: For program point L40-1(lines 26 46) no Hoare annotation was computed. [2020-07-20 22:17:48,758 INFO L264 CegarLoopResult]: At program point L40-2(lines 40 43) the Hoare annotation is: (<= main_~x~0 0) [2020-07-20 22:17:48,758 INFO L268 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-07-20 22:17:48,758 INFO L268 CegarLoopResult]: For program point L32-2(lines 26 46) no Hoare annotation was computed. [2020-07-20 22:17:48,759 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 46) the Hoare annotation is: true [2020-07-20 22:17:48,759 INFO L268 CegarLoopResult]: For program point L37(line 37) no Hoare annotation was computed. [2020-07-20 22:17:48,759 INFO L271 CegarLoopResult]: At program point L37-1(line 37) the Hoare annotation is: true [2020-07-20 22:17:48,759 INFO L268 CegarLoopResult]: For program point L37-3(lines 26 46) no Hoare annotation was computed. [2020-07-20 22:17:48,759 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 7 12) the Hoare annotation is: true [2020-07-20 22:17:48,759 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 7 12) no Hoare annotation was computed. [2020-07-20 22:17:48,760 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-07-20 22:17:48,760 INFO L268 CegarLoopResult]: For program point L8(lines 8 10) no Hoare annotation was computed. [2020-07-20 22:17:48,760 INFO L268 CegarLoopResult]: For program point L8-2(lines 7 12) no Hoare annotation was computed. [2020-07-20 22:17:48,760 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2020-07-20 22:17:48,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:17:48 BoogieIcfgContainer [2020-07-20 22:17:48,766 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:17:48,769 INFO L168 Benchmark]: Toolchain (without parser) took 1668.53 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 101.9 MB in the beginning and 124.4 MB in the end (delta: -22.5 MB). Peak memory consumption was 41.5 MB. Max. memory is 7.1 GB. [2020-07-20 22:17:48,770 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 22:17:48,771 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.83 ms. Allocated memory is still 137.9 MB. Free memory was 101.5 MB in the beginning and 91.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-20 22:17:48,772 INFO L168 Benchmark]: Boogie Preprocessor took 106.06 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.7 MB in the beginning and 180.0 MB in the end (delta: -88.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-20 22:17:48,773 INFO L168 Benchmark]: RCFGBuilder took 328.70 ms. Allocated memory is still 201.9 MB. Free memory was 180.0 MB in the beginning and 164.8 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. [2020-07-20 22:17:48,773 INFO L168 Benchmark]: TraceAbstraction took 963.63 ms. Allocated memory is still 201.9 MB. Free memory was 164.2 MB in the beginning and 124.4 MB in the end (delta: 39.8 MB). Peak memory consumption was 39.8 MB. Max. memory is 7.1 GB. [2020-07-20 22:17:48,777 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 137.9 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 256.83 ms. Allocated memory is still 137.9 MB. Free memory was 101.5 MB in the beginning and 91.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.06 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.7 MB in the beginning and 180.0 MB in the end (delta: -88.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 328.70 ms. Allocated memory is still 201.9 MB. Free memory was 180.0 MB in the beginning and 164.8 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 963.63 ms. Allocated memory is still 201.9 MB. Free memory was 164.2 MB in the beginning and 124.4 MB in the end (delta: 39.8 MB). Peak memory consumption was 39.8 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 1 SDslu, 79 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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, 11 PreInvPairs, 12 NumberOfFragments, 11 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 32 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 540 SizeOfPredicates, 2 NumberOfNonLiveVariables, 86 ConjunctsInSsa, 5 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...