/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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test_while_int.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:20:44,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:20:44,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:20:44,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:20:44,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:20:44,105 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:20:44,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:20:44,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:20:44,129 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:20:44,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:20:44,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:20:44,138 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:20:44,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:20:44,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:20:44,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:20:44,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:20:44,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:20:44,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:20:44,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:20:44,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:20:44,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:20:44,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:20:44,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:20:44,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:20:44,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:20:44,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:20:44,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:20:44,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:20:44,210 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 16:20:44,257 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:20:44,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:20:44,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:20:44,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:20:44,264 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:20:44,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:20:44,264 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:20:44,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:20:44,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:20:44,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:20:44,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:20:44,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:20:44,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:20:44,268 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:20:44,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:20:44,269 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:20:44,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:20:44,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:20:44,269 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:20:44,270 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:20:44,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:20:44,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:20:44,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:20:44,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:20:44,274 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:20:44,274 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:20:44,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:20:44,275 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:20:44,275 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:20:44,278 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 -> 2 [2020-07-21 16:20:44,658 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:20:44,677 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:20:44,682 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:20:44,684 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:20:44,685 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:20:44,686 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.i [2020-07-21 16:20:44,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc8649d76/205afae7495849698565066cd0785813/FLAG0b6dc2247 [2020-07-21 16:20:45,518 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:20:45,519 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.i [2020-07-21 16:20:45,528 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc8649d76/205afae7495849698565066cd0785813/FLAG0b6dc2247 [2020-07-21 16:20:45,822 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc8649d76/205afae7495849698565066cd0785813 [2020-07-21 16:20:45,836 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:20:45,840 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:20:45,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:20:45,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:20:45,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:20:45,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:20:45" (1/1) ... [2020-07-21 16:20:45,856 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a47b08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:20:45, skipping insertion in model container [2020-07-21 16:20:45,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:20:45" (1/1) ... [2020-07-21 16:20:45,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:20:45,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:20:46,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:20:46,132 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:20:46,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:20:46,190 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:20:46,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:20:46 WrapperNode [2020-07-21 16:20:46,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:20:46,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:20:46,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:20:46,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:20:46,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:20:46" (1/1) ... [2020-07-21 16:20:46,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:20:46" (1/1) ... [2020-07-21 16:20:46,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:20:46" (1/1) ... [2020-07-21 16:20:46,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:20:46" (1/1) ... [2020-07-21 16:20:46,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:20:46" (1/1) ... [2020-07-21 16:20:46,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:20:46" (1/1) ... [2020-07-21 16:20:46,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:20:46" (1/1) ... [2020-07-21 16:20:46,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:20:46,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:20:46,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:20:46,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:20:46,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:20:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:20:46,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:20:46,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:20:46,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-07-21 16:20:46,548 INFO L138 BoogieDeclarations]: Found implementation of procedure check_error [2020-07-21 16:20:46,548 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:20:46,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:20:46,549 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-07-21 16:20:46,549 INFO L130 BoogieDeclarations]: Found specification of procedure check_error [2020-07-21 16:20:46,550 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:20:46,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:20:46,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:20:46,796 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:20:46,797 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 16:20:46,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:20:46 BoogieIcfgContainer [2020-07-21 16:20:46,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:20:46,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:20:46,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:20:46,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:20:46,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:20:45" (1/3) ... [2020-07-21 16:20:46,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42db75b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:20:46, skipping insertion in model container [2020-07-21 16:20:46,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:20:46" (2/3) ... [2020-07-21 16:20:46,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42db75b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:20:46, skipping insertion in model container [2020-07-21 16:20:46,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:20:46" (3/3) ... [2020-07-21 16:20:46,817 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2020-07-21 16:20:46,832 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:20:46,842 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:20:46,861 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:20:46,898 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:20:46,898 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:20:46,898 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:20:46,899 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:20:46,899 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:20:46,899 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:20:46,899 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:20:46,899 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:20:46,926 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-21 16:20:46,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 16:20:46,935 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:20:46,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:20:46,938 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:20:46,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:20:46,945 INFO L82 PathProgramCache]: Analyzing trace with hash 708560652, now seen corresponding path program 1 times [2020-07-21 16:20:46,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:20:46,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937757408] [2020-07-21 16:20:46,955 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:20:47,073 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:20:47,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:20:47,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 16:20:47,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:20:47,176 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:20:47,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:20:47,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:20:47,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937757408] [2020-07-21 16:20:47,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:20:47,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 16:20:47,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749495015] [2020-07-21 16:20:47,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 16:20:47,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:20:47,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 16:20:47,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:20:47,285 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2020-07-21 16:20:47,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:20:47,440 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-07-21 16:20:47,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 16:20:47,443 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-07-21 16:20:47,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:20:47,452 INFO L225 Difference]: With dead ends: 42 [2020-07-21 16:20:47,453 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 16:20:47,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:20:47,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 16:20:47,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-07-21 16:20:47,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 16:20:47,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-07-21 16:20:47,504 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2020-07-21 16:20:47,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:20:47,505 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-07-21 16:20:47,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 16:20:47,505 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-07-21 16:20:47,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 16:20:47,507 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:20:47,507 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:20:47,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:20:47,723 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:20:47,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:20:47,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1910985178, now seen corresponding path program 1 times [2020-07-21 16:20:47,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:20:47,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359775616] [2020-07-21 16:20:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:20:47,771 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:20:47,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:20:47,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 16:20:47,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:20:47,825 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:20:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:20:47,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:20:47,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:20:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:20:47,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359775616] [2020-07-21 16:20:47,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:20:47,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-07-21 16:20:47,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881328981] [2020-07-21 16:20:47,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 16:20:47,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:20:47,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 16:20:47,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-21 16:20:47,977 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2020-07-21 16:20:48,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:20:48,079 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-07-21 16:20:48,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 16:20:48,081 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-07-21 16:20:48,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:20:48,083 INFO L225 Difference]: With dead ends: 30 [2020-07-21 16:20:48,083 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 16:20:48,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 16:20:48,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 16:20:48,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-07-21 16:20:48,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 16:20:48,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-07-21 16:20:48,094 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 17 [2020-07-21 16:20:48,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:20:48,095 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-07-21 16:20:48,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 16:20:48,095 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-07-21 16:20:48,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 16:20:48,097 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:20:48,097 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:20:48,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:20:48,312 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:20:48,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:20:48,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1165555160, now seen corresponding path program 2 times [2020-07-21 16:20:48,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:20:48,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597130972] [2020-07-21 16:20:48,315 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:20:48,350 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:20:48,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 16:20:48,350 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:20:48,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 16:20:48,362 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:20:48,381 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 16:20:48,382 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 16:20:48,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:20:48,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:20:48 BoogieIcfgContainer [2020-07-21 16:20:48,631 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:20:48,635 INFO L168 Benchmark]: Toolchain (without parser) took 2795.44 ms. Allocated memory was 145.8 MB in the beginning and 208.1 MB in the end (delta: 62.4 MB). Free memory was 103.7 MB in the beginning and 116.3 MB in the end (delta: -12.6 MB). Peak memory consumption was 49.8 MB. Max. memory is 7.1 GB. [2020-07-21 16:20:48,636 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 16:20:48,637 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.87 ms. Allocated memory is still 145.8 MB. Free memory was 103.3 MB in the beginning and 94.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-21 16:20:48,638 INFO L168 Benchmark]: Boogie Preprocessor took 56.55 ms. Allocated memory is still 145.8 MB. Free memory was 94.1 MB in the beginning and 92.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 16:20:48,639 INFO L168 Benchmark]: RCFGBuilder took 552.20 ms. Allocated memory was 145.8 MB in the beginning and 208.1 MB in the end (delta: 62.4 MB). Free memory was 92.7 MB in the beginning and 176.0 MB in the end (delta: -83.4 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 16:20:48,640 INFO L168 Benchmark]: TraceAbstraction took 1825.83 ms. Allocated memory is still 208.1 MB. Free memory was 176.0 MB in the beginning and 116.3 MB in the end (delta: 59.7 MB). Peak memory consumption was 59.7 MB. Max. memory is 7.1 GB. [2020-07-21 16:20:48,645 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 349.87 ms. Allocated memory is still 145.8 MB. Free memory was 103.3 MB in the beginning and 94.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 56.55 ms. Allocated memory is still 145.8 MB. Free memory was 94.1 MB in the beginning and 92.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 552.20 ms. Allocated memory was 145.8 MB in the beginning and 208.1 MB in the end (delta: 62.4 MB). Free memory was 92.7 MB in the beginning and 176.0 MB in the end (delta: -83.4 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1825.83 ms. Allocated memory is still 208.1 MB. Free memory was 176.0 MB in the beginning and 116.3 MB in the end (delta: 59.7 MB). Peak memory consumption was 59.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i=0; VAL [i=0] [L24] COND TRUE i<5 [L25] i++ VAL [i=1] [L29] CALL check_error(i!=3) VAL [\old(b)=1] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L29] RET check_error(i!=3) VAL [i=1] [L24] COND TRUE i<5 [L25] i++ VAL [i=2] [L29] CALL check_error(i!=3) VAL [\old(b)=1] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L29] RET check_error(i!=3) VAL [i=2] [L24] COND TRUE i<5 [L25] i++ VAL [i=3] [L29] CALL check_error(i!=3) VAL [\old(b)=0] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=0, b=0] [L18] CALL __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 10 SDslu, 90 SDs, 0 SdLazy, 46 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=2, 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, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 51 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 1092 SizeOfPredicates, 4 NumberOfNonLiveVariables, 66 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 4/8 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 incorrect! Received shutdown request...