/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 BIGGEST_EQUIVALENCE_CLASS --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/loop-acceleration/phases_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:12:38,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:12:38,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:12:38,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:12:38,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:12:38,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:12:38,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:12:38,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:12:38,285 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:12:38,286 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:12:38,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:12:38,288 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:12:38,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:12:38,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:12:38,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:12:38,292 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:12:38,293 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:12:38,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:12:38,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:12:38,302 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:12:38,304 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:12:38,305 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:12:38,307 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:12:38,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:12:38,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:12:38,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:12:38,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:12:38,323 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:12:38,324 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 23:12:38,353 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:12:38,354 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:12:38,356 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:12:38,356 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:12:38,356 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:12:38,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:12:38,357 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:12:38,357 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:12:38,357 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:12:38,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:12:38,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:12:38,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:12:38,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:12:38,359 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:12:38,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:12:38,360 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:12:38,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:12:38,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:12:38,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:12:38,360 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:12:38,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:12:38,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:12:38,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:12:38,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:12:38,362 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:12:38,362 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:12:38,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:12:38,363 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:12:38,365 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:12:38,365 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 -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 23:12:38,779 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:12:38,798 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:12:38,802 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:12:38,805 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:12:38,807 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:12:38,808 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_2-1.c [2020-07-21 23:12:38,901 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/192ef43d8/874567754fcf4b3b8a6e9b6ad18974cd/FLAG3f100eb80 [2020-07-21 23:12:39,550 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:12:39,551 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_2-1.c [2020-07-21 23:12:39,561 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/192ef43d8/874567754fcf4b3b8a6e9b6ad18974cd/FLAG3f100eb80 [2020-07-21 23:12:39,856 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/192ef43d8/874567754fcf4b3b8a6e9b6ad18974cd [2020-07-21 23:12:39,872 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:12:39,876 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:12:39,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:12:39,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:12:39,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:12:39,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:12:39" (1/1) ... [2020-07-21 23:12:39,891 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fe97743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:12:39, skipping insertion in model container [2020-07-21 23:12:39,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:12:39" (1/1) ... [2020-07-21 23:12:39,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:12:39,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:12:40,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:12:40,230 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:12:40,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:12:40,285 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:12:40,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:12:40 WrapperNode [2020-07-21 23:12:40,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:12:40,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:12:40,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:12:40,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:12:40,315 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:12:40" (1/1) ... [2020-07-21 23:12:40,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:12:40" (1/1) ... [2020-07-21 23:12:40,326 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:12:40" (1/1) ... [2020-07-21 23:12:40,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:12:40" (1/1) ... [2020-07-21 23:12:40,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:12:40" (1/1) ... [2020-07-21 23:12:40,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:12:40" (1/1) ... [2020-07-21 23:12:40,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:12:40" (1/1) ... [2020-07-21 23:12:40,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:12:40,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:12:40,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:12:40,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:12:40,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:12:40" (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 23:12:40,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:12:40,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:12:40,604 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:12:40,604 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 23:12:40,605 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:12:40,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:12:40,606 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:12:40,606 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:12:40,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 23:12:40,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 23:12:40,609 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:12:40,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:12:40,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:12:41,007 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:12:41,007 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 23:12:41,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:12:41 BoogieIcfgContainer [2020-07-21 23:12:41,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:12:41,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:12:41,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:12:41,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:12:41,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:12:39" (1/3) ... [2020-07-21 23:12:41,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386e6c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:12:41, skipping insertion in model container [2020-07-21 23:12:41,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:12:40" (2/3) ... [2020-07-21 23:12:41,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386e6c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:12:41, skipping insertion in model container [2020-07-21 23:12:41,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:12:41" (3/3) ... [2020-07-21 23:12:41,034 INFO L109 eAbstractionObserver]: Analyzing ICFG phases_2-1.c [2020-07-21 23:12:41,050 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:12:41,081 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:12:41,155 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:12:41,197 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:12:41,197 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:12:41,198 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:12:41,198 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:12:41,198 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:12:41,198 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:12:41,198 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:12:41,198 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:12:41,232 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-21 23:12:41,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 23:12:41,244 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:12:41,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:12:41,248 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:12:41,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:12:41,259 INFO L82 PathProgramCache]: Analyzing trace with hash 900249630, now seen corresponding path program 1 times [2020-07-21 23:12:41,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:12:41,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949867393] [2020-07-21 23:12:41,274 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 [2020-07-21 23:12:41,362 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:12:41,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:12:41,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 23:12:41,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:12:41,405 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 23:12:41,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:12:41,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949867393] [2020-07-21 23:12:41,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:12:41,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 23:12:41,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608376031] [2020-07-21 23:12:41,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 23:12:41,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:12:41,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 23:12:41,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:12:41,442 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-07-21 23:12:41,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:12:41,481 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-07-21 23:12:41,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 23:12:41,485 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-21 23:12:41,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:12:41,497 INFO L225 Difference]: With dead ends: 30 [2020-07-21 23:12:41,498 INFO L226 Difference]: Without dead ends: 13 [2020-07-21 23:12:41,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:12:41,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-21 23:12:41,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-21 23:12:41,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-21 23:12:41,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-07-21 23:12:41,562 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2020-07-21 23:12:41,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:12:41,563 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-07-21 23:12:41,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 23:12:41,563 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-07-21 23:12:41,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 23:12:41,564 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:12:41,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:12:41,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:12:41,767 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:12:41,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:12:41,769 INFO L82 PathProgramCache]: Analyzing trace with hash 891014420, now seen corresponding path program 1 times [2020-07-21 23:12:41,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:12:41,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865685648] [2020-07-21 23:12:41,770 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 [2020-07-21 23:12:41,802 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:12:41,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 23:12:41,803 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 23:12:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 23:12:41,815 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 23:12:41,831 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 23:12:41,831 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 23:12:42,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:12:42,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:12:42 BoogieIcfgContainer [2020-07-21 23:12:42,061 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 23:12:42,066 INFO L168 Benchmark]: Toolchain (without parser) took 2189.54 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 103.3 MB in the beginning and 142.4 MB in the end (delta: -39.1 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-07-21 23:12:42,068 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: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 23:12:42,070 INFO L168 Benchmark]: CACSL2BoogieTranslator took 411.57 ms. Allocated memory is still 138.4 MB. Free memory was 102.9 MB in the beginning and 93.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-21 23:12:42,071 INFO L168 Benchmark]: Boogie Preprocessor took 59.15 ms. Allocated memory is still 138.4 MB. Free memory was 93.5 MB in the beginning and 92.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 23:12:42,073 INFO L168 Benchmark]: RCFGBuilder took 665.70 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 91.9 MB in the beginning and 168.3 MB in the end (delta: -76.4 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-21 23:12:42,074 INFO L168 Benchmark]: TraceAbstraction took 1042.45 ms. Allocated memory is still 201.3 MB. Free memory was 167.7 MB in the beginning and 142.4 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. [2020-07-21 23:12:42,083 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: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 411.57 ms. Allocated memory is still 138.4 MB. Free memory was 102.9 MB in the beginning and 93.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 59.15 ms. Allocated memory is still 138.4 MB. Free memory was 93.5 MB in the beginning and 92.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 665.70 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 91.9 MB in the beginning and 168.3 MB in the end (delta: -76.4 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1042.45 ms. Allocated memory is still 201.3 MB. Free memory was 167.7 MB in the beginning and 142.4 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L16] unsigned int x = 1; [L17] unsigned int y = __VERIFIER_nondet_uint(); [L19] COND FALSE !(!(y > 0)) VAL [x=1, y=1] [L21] COND FALSE !(x < y) VAL [x=1, y=1] [L29] CALL __VERIFIER_assert(x != y) VAL [\old(cond)=0] [L9] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L10] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 22 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 100 SizeOfPredicates, 0 NumberOfNonLiveVariables, 22 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 incorrect! Received shutdown request...