/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/while_infinite_loop_3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:18:05,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:18:05,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:18:05,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:18:05,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:18:05,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:18:05,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:18:05,903 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:18:05,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:18:05,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:18:05,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:18:05,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:18:05,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:18:05,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:18:05,918 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:18:05,919 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:18:05,921 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:18:05,922 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:18:05,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:18:05,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:18:05,932 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:18:05,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:18:05,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:18:05,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:18:05,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:18:05,953 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 22:18:05,984 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:18:05,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:18:05,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:18:05,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:18:05,986 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:18:05,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:18:05,986 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:18:05,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:18:05,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:18:05,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:18:05,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:18:05,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:18:05,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:18:05,988 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:18:05,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:18:05,988 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:18:05,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:18:05,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:18:05,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:18:05,989 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:18:05,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:18:05,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:18:05,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:18:05,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:18:05,990 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:18:05,990 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:18:05,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:18:05,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:18:05,990 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:18:05,991 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 22:18:06,283 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:18:06,296 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:18:06,299 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:18:06,300 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:18:06,302 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:18:06,303 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_3.c [2020-07-20 22:18:06,375 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5434e2c0c/963dc885966e4705a17636f3f6f5fa65/FLAG0f00c7dce [2020-07-20 22:18:06,819 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:18:06,820 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_3.c [2020-07-20 22:18:06,826 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5434e2c0c/963dc885966e4705a17636f3f6f5fa65/FLAG0f00c7dce [2020-07-20 22:18:07,199 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5434e2c0c/963dc885966e4705a17636f3f6f5fa65 [2020-07-20 22:18:07,209 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:18:07,212 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:18:07,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:18:07,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:18:07,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:18:07,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:18:07" (1/1) ... [2020-07-20 22:18:07,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e755a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:18:07, skipping insertion in model container [2020-07-20 22:18:07,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:18:07" (1/1) ... [2020-07-20 22:18:07,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:18:07,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:18:07,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:18:07,414 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:18:07,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:18:07,444 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:18:07,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:18:07 WrapperNode [2020-07-20 22:18:07,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:18:07,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:18:07,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:18:07,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:18:07,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:18:07" (1/1) ... [2020-07-20 22:18:07,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:18:07" (1/1) ... [2020-07-20 22:18:07,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:18:07" (1/1) ... [2020-07-20 22:18:07,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:18:07" (1/1) ... [2020-07-20 22:18:07,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:18:07" (1/1) ... [2020-07-20 22:18:07,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:18:07" (1/1) ... [2020-07-20 22:18:07,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:18:07" (1/1) ... [2020-07-20 22:18:07,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:18:07,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:18:07,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:18:07,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:18:07,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:18:07" (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 22:18:07,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:18:07,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:18:07,649 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:18:07,649 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-07-20 22:18:07,649 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:18:07,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:18:07,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:18:07,650 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-07-20 22:18:07,650 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:18:07,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:18:07,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:18:07,806 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:18:07,806 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 22:18:07,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:18:07 BoogieIcfgContainer [2020-07-20 22:18:07,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:18:07,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:18:07,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:18:07,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:18:07,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:18:07" (1/3) ... [2020-07-20 22:18:07,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@160bfc3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:18:07, skipping insertion in model container [2020-07-20 22:18:07,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:18:07" (2/3) ... [2020-07-20 22:18:07,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@160bfc3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:18:07, skipping insertion in model container [2020-07-20 22:18:07,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:18:07" (3/3) ... [2020-07-20 22:18:07,820 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_3.c [2020-07-20 22:18:07,844 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:18:07,867 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:18:07,900 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:18:07,930 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:18:07,930 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:18:07,930 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:18:07,930 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:18:07,930 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:18:07,930 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:18:07,931 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:18:07,931 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:18:07,948 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-20 22:18:07,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 22:18:07,955 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:18:07,956 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:18:07,957 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:18:07,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:18:07,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1783967560, now seen corresponding path program 1 times [2020-07-20 22:18:07,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:18:07,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703719868] [2020-07-20 22:18:07,971 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 22:18:08,050 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:18:08,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:18:08,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 22:18:08,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:18:08,079 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 22:18:08,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:18:08,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703719868] [2020-07-20 22:18:08,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:18:08,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 22:18:08,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720548508] [2020-07-20 22:18:08,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 22:18:08,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:18:08,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 22:18:08,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 22:18:08,104 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-07-20 22:18:08,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:18:08,130 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2020-07-20 22:18:08,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 22:18:08,131 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 22:18:08,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:18:08,139 INFO L225 Difference]: With dead ends: 35 [2020-07-20 22:18:08,140 INFO L226 Difference]: Without dead ends: 17 [2020-07-20 22:18:08,143 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 22:18:08,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-20 22:18:08,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-20 22:18:08,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-20 22:18:08,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-20 22:18:08,180 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2020-07-20 22:18:08,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:18:08,180 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-20 22:18:08,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 22:18:08,181 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-20 22:18:08,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 22:18:08,182 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:18:08,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:18:08,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:18:08,396 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:18:08,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:18:08,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1698359207, now seen corresponding path program 1 times [2020-07-20 22:18:08,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:18:08,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107939333] [2020-07-20 22:18:08,399 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 22:18:08,423 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:18:08,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:18:08,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:18:08,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:18:08,491 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 22:18:08,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:18:08,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107939333] [2020-07-20 22:18:08,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:18:08,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:18:08,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471301993] [2020-07-20 22:18:08,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:18:08,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:18:08,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:18:08,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:18:08,495 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2020-07-20 22:18:08,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:18:08,553 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-07-20 22:18:08,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:18:08,553 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 22:18:08,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:18:08,554 INFO L225 Difference]: With dead ends: 17 [2020-07-20 22:18:08,554 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 22:18:08,555 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 22:18:08,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 22:18:08,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 22:18:08,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 22:18:08,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 22:18:08,557 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-07-20 22:18:08,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:18:08,557 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 22:18:08,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:18:08,558 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 22:18:08,558 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 22:18:08,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:18:08,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 22:18:08,867 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 22:18:08,867 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 22:18:08,867 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:18:08,868 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 22:18:08,868 INFO L268 CegarLoopResult]: For program point L14-1(lines 12 19) no Hoare annotation was computed. [2020-07-20 22:18:08,868 INFO L268 CegarLoopResult]: For program point evalEXIT(lines 12 19) no Hoare annotation was computed. [2020-07-20 22:18:08,868 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:18:08,869 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (= 0 ~x~0) [2020-07-20 22:18:08,869 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 22:18:08,869 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 22:18:08,869 INFO L268 CegarLoopResult]: For program point L30(line 30) no Hoare annotation was computed. [2020-07-20 22:18:08,870 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 22:18:08,870 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 22:18:08,870 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 22:18:08,870 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 22 33) no Hoare annotation was computed. [2020-07-20 22:18:08,870 INFO L264 CegarLoopResult]: At program point L24-1(lines 24 28) the Hoare annotation is: (not (= 0 |old(~x~0)|)) [2020-07-20 22:18:08,871 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 22 33) no Hoare annotation was computed. [2020-07-20 22:18:08,871 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-20 22:18:08,871 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-20 22:18:08,871 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 22:18:08,871 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-20 22:18:08,872 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-20 22:18:08,872 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-20 22:18:08,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:18:08 BoogieIcfgContainer [2020-07-20 22:18:08,878 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:18:08,881 INFO L168 Benchmark]: Toolchain (without parser) took 1669.01 ms. Allocated memory was 138.4 MB in the beginning and 204.5 MB in the end (delta: 66.1 MB). Free memory was 103.3 MB in the beginning and 131.0 MB in the end (delta: -27.7 MB). Peak memory consumption was 38.4 MB. Max. memory is 7.1 GB. [2020-07-20 22:18:08,883 INFO L168 Benchmark]: CDTParser took 0.43 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 22:18:08,885 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.87 ms. Allocated memory is still 138.4 MB. Free memory was 102.9 MB in the beginning and 93.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-20 22:18:08,887 INFO L168 Benchmark]: Boogie Preprocessor took 138.73 ms. Allocated memory was 138.4 MB in the beginning and 204.5 MB in the end (delta: 66.1 MB). Free memory was 93.6 MB in the beginning and 184.6 MB in the end (delta: -90.9 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-07-20 22:18:08,888 INFO L168 Benchmark]: RCFGBuilder took 225.35 ms. Allocated memory is still 204.5 MB. Free memory was 184.6 MB in the beginning and 172.4 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-07-20 22:18:08,889 INFO L168 Benchmark]: TraceAbstraction took 1067.02 ms. Allocated memory is still 204.5 MB. Free memory was 172.4 MB in the beginning and 131.0 MB in the end (delta: 41.4 MB). Peak memory consumption was 41.4 MB. Max. memory is 7.1 GB. [2020-07-20 22:18:08,900 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 231.87 ms. Allocated memory is still 138.4 MB. Free memory was 102.9 MB in the beginning and 93.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.73 ms. Allocated memory was 138.4 MB in the beginning and 204.5 MB in the end (delta: 66.1 MB). Free memory was 93.6 MB in the beginning and 184.6 MB in the end (delta: -90.9 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 225.35 ms. Allocated memory is still 204.5 MB. Free memory was 184.6 MB in the beginning and 172.4 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1067.02 ms. Allocated memory is still 204.5 MB. Free memory was 172.4 MB in the beginning and 131.0 MB in the end (delta: 41.4 MB). Peak memory consumption was 41.4 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: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, 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, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 24 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 380 SizeOfPredicates, 3 NumberOfNonLiveVariables, 46 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...