/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.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:59:48,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:59:48,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:59:48,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:59:48,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:59:48,770 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:59:48,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:59:48,779 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:59:48,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:59:48,788 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:59:48,789 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:59:48,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:59:48,800 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:59:48,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:59:48,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:59:48,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:59:48,812 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:59:48,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:59:48,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:59:48,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:59:48,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:59:48,837 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:59:48,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:59:48,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:59:48,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:59:48,872 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 16:59:48,899 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:59:48,900 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:59:48,903 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:59:48,904 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:59:48,904 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:59:48,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:59:48,905 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:59:48,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:59:48,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:59:48,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:59:48,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:59:48,907 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:59:48,907 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:59:48,908 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:59:48,908 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:59:48,909 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:59:48,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:59:48,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:59:48,909 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:59:48,910 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:59:48,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:59:48,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:59:48,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:59:48,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:59:48,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:59:48,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:59:48,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:59:48,911 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:59:48,911 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:59:48,912 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 16:59:49,290 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:59:49,308 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:59:49,313 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:59:49,315 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:59:49,316 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:59:49,317 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.i [2020-07-21 16:59:49,408 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f77ea129b/71ec06a3d3b743e69c527d85fa4ff1e4/FLAGa6954e555 [2020-07-21 16:59:49,992 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:59:49,993 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.i [2020-07-21 16:59:50,005 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f77ea129b/71ec06a3d3b743e69c527d85fa4ff1e4/FLAGa6954e555 [2020-07-21 16:59:50,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f77ea129b/71ec06a3d3b743e69c527d85fa4ff1e4 [2020-07-21 16:59:50,344 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:59:50,347 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:59:50,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:59:50,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:59:50,354 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:59:50,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:59:50" (1/1) ... [2020-07-21 16:59:50,360 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ff42636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:50, skipping insertion in model container [2020-07-21 16:59:50,360 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:59:50" (1/1) ... [2020-07-21 16:59:50,370 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:59:50,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:59:50,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:59:50,646 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:59:50,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:59:50,679 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:59:50,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:50 WrapperNode [2020-07-21 16:59:50,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:59:50,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:59:50,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:59:50,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:59:50,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:50" (1/1) ... [2020-07-21 16:59:50,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:50" (1/1) ... [2020-07-21 16:59:50,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:50" (1/1) ... [2020-07-21 16:59:50,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:50" (1/1) ... [2020-07-21 16:59:50,709 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:50" (1/1) ... [2020-07-21 16:59:50,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:50" (1/1) ... [2020-07-21 16:59:50,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:50" (1/1) ... [2020-07-21 16:59:50,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:59:50,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:59:50,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:59:50,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:59:50,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:50" (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 16:59:50,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:59:50,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:59:50,896 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 16:59:50,897 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 16:59:50,897 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:59:50,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:59:50,897 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:59:50,897 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 16:59:50,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:59:50,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:59:50,898 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:59:50,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:59:50,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:59:51,130 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:59:51,130 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 16:59:51,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:59:51 BoogieIcfgContainer [2020-07-21 16:59:51,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:59:51,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:59:51,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:59:51,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:59:51,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:59:50" (1/3) ... [2020-07-21 16:59:51,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b58adc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:59:51, skipping insertion in model container [2020-07-21 16:59:51,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:50" (2/3) ... [2020-07-21 16:59:51,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b58adc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:59:51, skipping insertion in model container [2020-07-21 16:59:51,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:59:51" (3/3) ... [2020-07-21 16:59:51,147 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.i [2020-07-21 16:59:51,162 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:59:51,172 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:59:51,193 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:59:51,225 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:59:51,225 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:59:51,225 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:59:51,226 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:59:51,226 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:59:51,226 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:59:51,226 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:59:51,226 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:59:51,248 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-21 16:59:51,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 16:59:51,255 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:59:51,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:59:51,257 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:59:51,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:59:51,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1608903343, now seen corresponding path program 1 times [2020-07-21 16:59:51,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:59:51,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843759594] [2020-07-21 16:59:51,272 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 16:59:51,356 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:59:51,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:59:51,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 16:59:51,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:59:51,449 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 16:59:51,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:59:51,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843759594] [2020-07-21 16:59:51,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:59:51,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:59:51,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170488029] [2020-07-21 16:59:51,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:59:51,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:59:51,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:59:51,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:59:51,501 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-07-21 16:59:51,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:59:51,550 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-07-21 16:59:51,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:59:51,552 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-07-21 16:59:51,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:59:51,563 INFO L225 Difference]: With dead ends: 34 [2020-07-21 16:59:51,564 INFO L226 Difference]: Without dead ends: 13 [2020-07-21 16:59:51,569 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 16:59:51,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-21 16:59:51,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-21 16:59:51,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-21 16:59:51,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-21 16:59:51,624 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-07-21 16:59:51,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:59:51,625 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-21 16:59:51,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:59:51,625 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-21 16:59:51,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 16:59:51,626 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:59:51,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:59:51,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:59:51,843 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:59:51,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:59:51,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1628066164, now seen corresponding path program 1 times [2020-07-21 16:59:51,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:59:51,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007631508] [2020-07-21 16:59:51,846 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 16:59:51,881 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:59:51,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:59:51,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 16:59:51,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:59:51,942 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:59:51,989 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 16:59:51,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:59:52,038 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:59:52,120 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 16:59:52,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007631508] [2020-07-21 16:59:52,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:59:52,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 16:59:52,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311959248] [2020-07-21 16:59:52,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 16:59:52,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:59:52,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 16:59:52,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-21 16:59:52,126 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2020-07-21 16:59:52,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:59:52,223 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2020-07-21 16:59:52,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 16:59:52,224 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2020-07-21 16:59:52,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:59:52,224 INFO L225 Difference]: With dead ends: 15 [2020-07-21 16:59:52,225 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 16:59:52,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-07-21 16:59:52,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 16:59:52,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 16:59:52,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 16:59:52,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 16:59:52,229 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2020-07-21 16:59:52,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:59:52,229 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 16:59:52,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 16:59:52,230 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 16:59:52,230 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 16:59:52,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:59:52,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 16:59:52,569 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 16:59:52,569 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 16:59:52,570 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 16:59:52,570 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 16:59:52,570 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 16:59:52,570 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 16:59:52,570 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 16:59:52,570 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 16:59:52,571 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 16:59:52,571 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 16:59:52,571 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 24) the Hoare annotation is: true [2020-07-21 16:59:52,571 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 24) no Hoare annotation was computed. [2020-07-21 16:59:52,571 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-07-21 16:59:52,572 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-07-21 16:59:52,572 INFO L264 CegarLoopResult]: At program point L18-2(lines 18 21) the Hoare annotation is: (or (< 0 main_~y~0) (< main_~x~0 0)) [2020-07-21 16:59:52,572 INFO L264 CegarLoopResult]: At program point L18-3(lines 18 21) the Hoare annotation is: (< 0 main_~y~0) [2020-07-21 16:59:52,572 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 24) no Hoare annotation was computed. [2020-07-21 16:59:52,573 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-21 16:59:52,573 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-21 16:59:52,573 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 16:59:52,573 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-21 16:59:52,573 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-21 16:59:52,574 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-21 16:59:52,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:59:52 BoogieIcfgContainer [2020-07-21 16:59:52,599 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:59:52,603 INFO L168 Benchmark]: Toolchain (without parser) took 2256.18 ms. Allocated memory was 144.2 MB in the beginning and 200.3 MB in the end (delta: 56.1 MB). Free memory was 101.9 MB in the beginning and 111.4 MB in the end (delta: -9.5 MB). Peak memory consumption was 46.6 MB. Max. memory is 7.1 GB. [2020-07-21 16:59:52,605 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 144.2 MB. Free memory is still 120.0 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 16:59:52,606 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.77 ms. Allocated memory is still 144.2 MB. Free memory was 101.9 MB in the beginning and 92.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 16:59:52,607 INFO L168 Benchmark]: Boogie Preprocessor took 138.58 ms. Allocated memory was 144.2 MB in the beginning and 200.3 MB in the end (delta: 56.1 MB). Free memory was 92.2 MB in the beginning and 180.1 MB in the end (delta: -87.9 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-07-21 16:59:52,608 INFO L168 Benchmark]: RCFGBuilder took 315.90 ms. Allocated memory is still 200.3 MB. Free memory was 180.1 MB in the beginning and 167.0 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-07-21 16:59:52,609 INFO L168 Benchmark]: TraceAbstraction took 1462.16 ms. Allocated memory is still 200.3 MB. Free memory was 166.0 MB in the beginning and 111.4 MB in the end (delta: 54.6 MB). Peak memory consumption was 54.6 MB. Max. memory is 7.1 GB. [2020-07-21 16:59:52,614 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 144.2 MB. Free memory is still 120.0 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 331.77 ms. Allocated memory is still 144.2 MB. Free memory was 101.9 MB in the beginning and 92.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.58 ms. Allocated memory was 144.2 MB in the beginning and 200.3 MB in the end (delta: 56.1 MB). Free memory was 92.2 MB in the beginning and 180.1 MB in the end (delta: -87.9 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 315.90 ms. Allocated memory is still 200.3 MB. Free memory was 180.1 MB in the beginning and 167.0 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1462.16 ms. Allocated memory is still 200.3 MB. Free memory was 166.0 MB in the beginning and 111.4 MB in the end (delta: 54.6 MB). Peak memory consumption was 54.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 18]: Loop Invariant Derived loop invariant: 0 < y || x < 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 26 SDtfs, 6 SDslu, 43 SDs, 0 SdLazy, 32 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 13 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 20 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 796 SizeOfPredicates, 5 NumberOfNonLiveVariables, 61 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...