/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/loop-lit/gsv2008.c.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:59:42,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:59:42,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:59:42,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:59:42,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:59:42,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:59:42,770 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:59:42,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:59:42,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:59:42,778 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:59:42,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:59:42,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:59:42,783 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:59:42,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:59:42,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:59:42,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:59:42,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:59:42,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:59:42,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:59:42,807 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:59:42,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:59:42,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:59:42,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:59:42,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:59:42,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:59:42,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:59:42,835 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:59:42,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:59:42,838 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 16:59:42,876 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:59:42,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:59:42,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:59:42,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:59:42,878 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:59:42,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:59:42,879 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:59:42,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:59:42,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:59:42,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:59:42,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:59:42,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:59:42,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:59:42,880 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:59:42,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:59:42,880 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:59:42,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:59:42,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:59:42,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:59:42,881 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:59:42,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:59:42,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:59:42,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:59:42,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:59:42,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:59:42,882 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:59:42,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:59:42,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:59:42,883 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:59:42,883 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 16:59:43,193 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:59:43,212 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:59:43,216 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:59:43,220 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:59:43,220 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:59:43,222 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2020-07-21 16:59:43,312 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dda3faefb/11f5f40f6945495b85ce7215e5f8674b/FLAG2c7560ce8 [2020-07-21 16:59:43,793 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:59:43,796 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2020-07-21 16:59:43,803 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dda3faefb/11f5f40f6945495b85ce7215e5f8674b/FLAG2c7560ce8 [2020-07-21 16:59:44,178 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dda3faefb/11f5f40f6945495b85ce7215e5f8674b [2020-07-21 16:59:44,187 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:59:44,190 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:59:44,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:59:44,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:59:44,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:59:44,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:59:44" (1/1) ... [2020-07-21 16:59:44,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e26be9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:44, skipping insertion in model container [2020-07-21 16:59:44,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:59:44" (1/1) ... [2020-07-21 16:59:44,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:59:44,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:59:44,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:59:44,395 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:59:44,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:59:44,424 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:59:44,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:44 WrapperNode [2020-07-21 16:59:44,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:59:44,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:59:44,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:59:44,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:59:44,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:44" (1/1) ... [2020-07-21 16:59:44,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:44" (1/1) ... [2020-07-21 16:59:44,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:44" (1/1) ... [2020-07-21 16:59:44,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:44" (1/1) ... [2020-07-21 16:59:44,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:44" (1/1) ... [2020-07-21 16:59:44,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:44" (1/1) ... [2020-07-21 16:59:44,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:44" (1/1) ... [2020-07-21 16:59:44,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:59:44,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:59:44,531 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:59:44,531 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:59:44,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:44" (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 16:59:44,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:59:44,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:59:44,599 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 16:59:44,599 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:59:44,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:59:44,599 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:59:44,600 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 16:59:44,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:59:44,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:59:44,600 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:59:44,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:59:44,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:59:44,793 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:59:44,794 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 16:59:44,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:59:44 BoogieIcfgContainer [2020-07-21 16:59:44,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:59:44,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:59:44,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:59:44,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:59:44,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:59:44" (1/3) ... [2020-07-21 16:59:44,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@112e6bf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:59:44, skipping insertion in model container [2020-07-21 16:59:44,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:44" (2/3) ... [2020-07-21 16:59:44,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@112e6bf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:59:44, skipping insertion in model container [2020-07-21 16:59:44,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:59:44" (3/3) ... [2020-07-21 16:59:44,808 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.v+cfa-reducer.c [2020-07-21 16:59:44,820 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:59:44,829 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:59:44,856 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:59:44,888 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:59:44,888 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:59:44,888 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:59:44,888 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:59:44,889 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:59:44,889 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:59:44,889 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:59:44,890 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:59:44,911 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-07-21 16:59:44,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 16:59:44,919 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:59:44,920 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:59:44,920 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:59:44,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:59:44,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1330899215, now seen corresponding path program 1 times [2020-07-21 16:59:44,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:59:44,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363813889] [2020-07-21 16:59:44,939 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 16:59:45,028 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:59:45,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:59:45,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 16:59:45,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:59:45,095 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 16:59:45,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:59:45,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363813889] [2020-07-21 16:59:45,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:59:45,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:59:45,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527790957] [2020-07-21 16:59:45,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:59:45,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:59:45,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:59:45,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:59:45,116 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 3 states. [2020-07-21 16:59:45,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:59:45,147 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-07-21 16:59:45,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:59:45,150 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-07-21 16:59:45,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:59:45,163 INFO L225 Difference]: With dead ends: 26 [2020-07-21 16:59:45,164 INFO L226 Difference]: Without dead ends: 13 [2020-07-21 16:59:45,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:59:45,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-21 16:59:45,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-21 16:59:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-21 16:59:45,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-21 16:59:45,219 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-07-21 16:59:45,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:59:45,220 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-21 16:59:45,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:59:45,220 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-21 16:59:45,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 16:59:45,222 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:59:45,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:59:45,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:59:45,439 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:59:45,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:59:45,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1691859760, now seen corresponding path program 1 times [2020-07-21 16:59:45,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:59:45,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723379388] [2020-07-21 16:59:45,441 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 16:59:45,481 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:59:45,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:59:45,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 16:59:45,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:59:45,522 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:59:45,527 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:59:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:59:45,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:59:45,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:59:45,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:59:45,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723379388] [2020-07-21 16:59:45,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:59:45,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-21 16:59:45,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838152798] [2020-07-21 16:59:45,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 16:59:45,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:59:45,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 16:59:45,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:59:45,617 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2020-07-21 16:59:45,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:59:45,683 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2020-07-21 16:59:45,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 16:59:45,684 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-07-21 16:59:45,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:59:45,684 INFO L225 Difference]: With dead ends: 15 [2020-07-21 16:59:45,685 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 16:59:45,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-21 16:59:45,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 16:59:45,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 16:59:45,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 16:59:45,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 16:59:45,688 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2020-07-21 16:59:45,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:59:45,688 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 16:59:45,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 16:59:45,689 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 16:59:45,689 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 16:59:45,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:59:45,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 16:59:45,975 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 16:59:45,976 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 16:59:45,976 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 16:59:45,976 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 16:59:45,976 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 16:59:45,977 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 16:59:45,977 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 16:59:45,977 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-07-21 16:59:45,977 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 16:59:45,977 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-07-21 16:59:45,978 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-07-21 16:59:45,978 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 46) no Hoare annotation was computed. [2020-07-21 16:59:45,978 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 58) the Hoare annotation is: true [2020-07-21 16:59:45,978 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 58) no Hoare annotation was computed. [2020-07-21 16:59:45,978 INFO L268 CegarLoopResult]: For program point L23(lines 23 56) no Hoare annotation was computed. [2020-07-21 16:59:45,979 INFO L268 CegarLoopResult]: For program point L17(lines 17 57) no Hoare annotation was computed. [2020-07-21 16:59:45,979 INFO L268 CegarLoopResult]: For program point L46(line 46) no Hoare annotation was computed. [2020-07-21 16:59:45,979 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 58) no Hoare annotation was computed. [2020-07-21 16:59:45,979 INFO L268 CegarLoopResult]: For program point L44(lines 44 53) no Hoare annotation was computed. [2020-07-21 16:59:45,980 INFO L264 CegarLoopResult]: At program point L35(lines 28 56) the Hoare annotation is: (or (< 0 main_~main__y~0) (< main_~main__x~0 0)) [2020-07-21 16:59:45,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:59:45 BoogieIcfgContainer [2020-07-21 16:59:45,998 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:59:46,001 INFO L168 Benchmark]: Toolchain (without parser) took 1811.63 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 104.6 MB in the beginning and 121.0 MB in the end (delta: -16.4 MB). Peak memory consumption was 40.8 MB. Max. memory is 7.1 GB. [2020-07-21 16:59:46,003 INFO L168 Benchmark]: CDTParser took 0.61 ms. Allocated memory is still 146.8 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 16:59:46,004 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.23 ms. Allocated memory is still 146.8 MB. Free memory was 104.2 MB in the beginning and 94.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 16:59:46,005 INFO L168 Benchmark]: Boogie Preprocessor took 105.62 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 94.6 MB in the beginning and 183.2 MB in the end (delta: -88.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-21 16:59:46,006 INFO L168 Benchmark]: RCFGBuilder took 268.24 ms. Allocated memory is still 203.9 MB. Free memory was 183.2 MB in the beginning and 170.9 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-07-21 16:59:46,007 INFO L168 Benchmark]: TraceAbstraction took 1198.31 ms. Allocated memory is still 203.9 MB. Free memory was 170.3 MB in the beginning and 121.0 MB in the end (delta: 49.3 MB). Peak memory consumption was 49.3 MB. Max. memory is 7.1 GB. [2020-07-21 16:59:46,011 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.61 ms. Allocated memory is still 146.8 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 233.23 ms. Allocated memory is still 146.8 MB. Free memory was 104.2 MB in the beginning and 94.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 105.62 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 94.6 MB in the beginning and 183.2 MB in the end (delta: -88.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 268.24 ms. Allocated memory is still 203.9 MB. Free memory was 183.2 MB in the beginning and 170.9 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1198.31 ms. Allocated memory is still 203.9 MB. Free memory was 170.3 MB in the beginning and 121.0 MB in the end (delta: 49.3 MB). Peak memory consumption was 49.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 46]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 0 < main__y || main__x < 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 7 SDslu, 34 SDs, 0 SdLazy, 16 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred 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, 5 LocationsWithAnnotation, 5 PreInvPairs, 7 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 23 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 814 SizeOfPredicates, 6 NumberOfNonLiveVariables, 73 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2 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...