/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --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 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 06:10:21,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 06:10:21,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 06:10:21,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 06:10:21,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 06:10:21,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 06:10:21,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 06:10:21,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 06:10:21,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 06:10:21,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 06:10:21,172 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 06:10:21,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 06:10:21,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 06:10:21,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 06:10:21,176 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 06:10:21,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 06:10:21,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 06:10:21,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 06:10:21,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 06:10:21,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 06:10:21,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 06:10:21,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 06:10:21,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 06:10:21,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 06:10:21,191 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 06:10:21,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 06:10:21,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 06:10:21,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 06:10:21,203 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 06:10:21,220 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 06:10:21,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 06:10:21,221 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 06:10:21,221 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 06:10:21,222 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 06:10:21,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 06:10:21,222 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 06:10:21,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 06:10:21,222 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 06:10:21,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 06:10:21,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 06:10:21,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 06:10:21,223 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 06:10:21,223 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 06:10:21,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 06:10:21,224 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 06:10:21,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 06:10:21,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 06:10:21,224 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 06:10:21,224 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 06:10:21,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 06:10:21,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:10:21,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 06:10:21,225 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 06:10:21,226 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 06:10:21,226 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 06:10:21,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 06:10:21,226 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 06:10:21,226 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 06:10:21,226 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 06:10:21,561 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 06:10:21,577 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 06:10:21,582 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 06:10:21,583 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 06:10:21,584 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 06:10:21,585 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-07-20 06:10:21,662 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70e5fd0c0/57c9158b51a248689e9ed6abff06be7f/FLAGde4a46b83 [2020-07-20 06:10:22,224 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 06:10:22,225 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-07-20 06:10:22,234 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70e5fd0c0/57c9158b51a248689e9ed6abff06be7f/FLAGde4a46b83 [2020-07-20 06:10:22,542 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70e5fd0c0/57c9158b51a248689e9ed6abff06be7f [2020-07-20 06:10:22,552 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 06:10:22,556 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 06:10:22,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 06:10:22,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 06:10:22,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 06:10:22,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:10:22" (1/1) ... [2020-07-20 06:10:22,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59f9ef3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:22, skipping insertion in model container [2020-07-20 06:10:22,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:10:22" (1/1) ... [2020-07-20 06:10:22,577 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 06:10:22,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 06:10:22,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:10:22,818 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 06:10:22,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:10:22,856 INFO L208 MainTranslator]: Completed translation [2020-07-20 06:10:22,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:22 WrapperNode [2020-07-20 06:10:22,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 06:10:22,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 06:10:22,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 06:10:22,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 06:10:22,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:22" (1/1) ... [2020-07-20 06:10:22,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:22" (1/1) ... [2020-07-20 06:10:22,883 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:22" (1/1) ... [2020-07-20 06:10:22,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:22" (1/1) ... [2020-07-20 06:10:22,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:22" (1/1) ... [2020-07-20 06:10:22,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:22" (1/1) ... [2020-07-20 06:10:23,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:22" (1/1) ... [2020-07-20 06:10:23,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 06:10:23,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 06:10:23,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 06:10:23,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 06:10:23,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:10:23,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 06:10:23,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 06:10:23,084 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 06:10:23,084 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 06:10:23,084 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 06:10:23,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 06:10:23,084 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 06:10:23,084 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 06:10:23,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 06:10:23,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 06:10:23,085 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 06:10:23,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 06:10:23,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 06:10:23,359 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 06:10:23,360 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 06:10:23,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:10:23 BoogieIcfgContainer [2020-07-20 06:10:23,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 06:10:23,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 06:10:23,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 06:10:23,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 06:10:23,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:10:22" (1/3) ... [2020-07-20 06:10:23,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@705d0f9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:10:23, skipping insertion in model container [2020-07-20 06:10:23,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:22" (2/3) ... [2020-07-20 06:10:23,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@705d0f9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:10:23, skipping insertion in model container [2020-07-20 06:10:23,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:10:23" (3/3) ... [2020-07-20 06:10:23,413 INFO L109 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2020-07-20 06:10:23,430 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 06:10:23,439 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 06:10:23,457 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 06:10:23,484 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 06:10:23,484 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 06:10:23,485 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 06:10:23,485 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 06:10:23,486 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 06:10:23,486 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 06:10:23,486 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 06:10:23,486 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 06:10:23,507 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-20 06:10:23,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 06:10:23,513 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:10:23,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:10:23,515 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:10:23,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:10:23,521 INFO L82 PathProgramCache]: Analyzing trace with hash -917653371, now seen corresponding path program 1 times [2020-07-20 06:10:23,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:10:23,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890516191] [2020-07-20 06:10:23,530 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5614e4c0 [2020-07-20 06:10:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:10:23,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890516191] [2020-07-20 06:10:23,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:10:23,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 06:10:23,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564743811] [2020-07-20 06:10:23,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 06:10:23,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:10:23,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 06:10:23,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 06:10:23,664 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-07-20 06:10:23,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:10:23,689 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-07-20 06:10:23,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 06:10:23,691 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-07-20 06:10:23,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:10:23,701 INFO L225 Difference]: With dead ends: 35 [2020-07-20 06:10:23,702 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 06:10:23,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 06:10:23,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 06:10:23,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 06:10:23,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 06:10:23,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-07-20 06:10:23,752 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2020-07-20 06:10:23,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:10:23,753 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-07-20 06:10:23,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 06:10:23,753 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-07-20 06:10:23,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 06:10:23,754 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:10:23,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:10:23,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 06:10:23,755 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:10:23,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:10:23,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1750778295, now seen corresponding path program 1 times [2020-07-20 06:10:23,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:10:23,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331572602] [2020-07-20 06:10:23,757 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5614e4c0 [2020-07-20 06:10:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:10:23,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331572602] [2020-07-20 06:10:23,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:10:23,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 06:10:23,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316597589] [2020-07-20 06:10:23,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 06:10:23,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:10:23,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 06:10:23,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 06:10:23,818 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2020-07-20 06:10:23,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:10:23,837 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-07-20 06:10:23,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 06:10:23,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-20 06:10:23,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:10:23,839 INFO L225 Difference]: With dead ends: 24 [2020-07-20 06:10:23,839 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 06:10:23,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 06:10:23,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 06:10:23,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 06:10:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 06:10:23,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-20 06:10:23,850 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2020-07-20 06:10:23,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:10:23,851 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-20 06:10:23,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 06:10:23,851 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-20 06:10:23,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 06:10:23,852 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:10:23,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:10:23,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 06:10:23,853 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:10:23,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:10:23,853 INFO L82 PathProgramCache]: Analyzing trace with hash -941431669, now seen corresponding path program 1 times [2020-07-20 06:10:23,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:10:23,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277593237] [2020-07-20 06:10:23,854 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5614e4c0 [2020-07-20 06:10:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:23,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 06:10:23,926 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Asserted terms must be closed at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.assertTerm(SMTInterpol.java:665) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.InterpolantChecker.checkFinalInterpolants(InterpolantChecker.java:423) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:218) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:874) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:392) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:386) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-20 06:10:23,935 INFO L168 Benchmark]: Toolchain (without parser) took 1379.53 ms. Allocated memory was 137.9 MB in the beginning and 202.9 MB in the end (delta: 65.0 MB). Free memory was 101.3 MB in the beginning and 141.4 MB in the end (delta: -40.1 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. [2020-07-20 06:10:23,937 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 06:10:23,939 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.57 ms. Allocated memory is still 137.9 MB. Free memory was 100.9 MB in the beginning and 91.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-20 06:10:23,941 INFO L168 Benchmark]: Boogie Preprocessor took 144.20 ms. Allocated memory was 137.9 MB in the beginning and 202.9 MB in the end (delta: 65.0 MB). Free memory was 91.2 MB in the beginning and 182.1 MB in the end (delta: -90.9 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-07-20 06:10:23,942 INFO L168 Benchmark]: RCFGBuilder took 383.19 ms. Allocated memory is still 202.9 MB. Free memory was 182.1 MB in the beginning and 168.3 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-20 06:10:23,944 INFO L168 Benchmark]: TraceAbstraction took 540.42 ms. Allocated memory is still 202.9 MB. Free memory was 167.7 MB in the beginning and 141.4 MB in the end (delta: 26.2 MB). Peak memory consumption was 26.2 MB. Max. memory is 7.1 GB. [2020-07-20 06:10:23,956 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 300.57 ms. Allocated memory is still 137.9 MB. Free memory was 100.9 MB in the beginning and 91.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 144.20 ms. Allocated memory was 137.9 MB in the beginning and 202.9 MB in the end (delta: 65.0 MB). Free memory was 91.2 MB in the beginning and 182.1 MB in the end (delta: -90.9 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 383.19 ms. Allocated memory is still 202.9 MB. Free memory was 182.1 MB in the beginning and 168.3 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 540.42 ms. Allocated memory is still 202.9 MB. Free memory was 167.7 MB in the beginning and 141.4 MB in the end (delta: 26.2 MB). Peak memory consumption was 26.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Asserted terms must be closed de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Asserted terms must be closed: de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.assertTerm(SMTInterpol.java:665) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...