/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 NUM_FUNCTIONS --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/loops/trex02-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:40:26,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:40:26,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:40:26,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:40:26,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:40:26,403 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:40:26,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:40:26,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:40:26,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:40:26,409 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:40:26,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:40:26,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:40:26,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:40:26,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:40:26,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:40:26,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:40:26,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:40:26,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:40:26,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:40:26,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:40:26,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:40:26,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:40:26,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:40:26,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:40:26,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 23:40:26,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:40:26,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:40:26,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:40:26,455 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 [2020-07-19 23:40:26,481 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:40:26,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:40:26,484 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:40:26,485 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:40:26,485 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:40:26,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:40:26,485 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:40:26,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:40:26,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:40:26,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:40:26,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:40:26,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:40:26,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:40:26,488 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:40:26,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:40:26,489 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:40:26,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:40:26,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:40:26,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:40:26,489 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:40:26,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:40:26,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:40:26,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:40:26,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:40:26,491 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:40:26,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:40:26,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:40:26,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:40:26,491 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:40:26,491 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS 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 [2020-07-19 23:40:26,844 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:40:26,859 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:40:26,862 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:40:26,864 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:40:26,864 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:40:26,865 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex02-2.c [2020-07-19 23:40:26,936 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e2ab836c/5801c6ed91554048880c94f976c808c9/FLAGc50cf5d86 [2020-07-19 23:40:27,442 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:40:27,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02-2.c [2020-07-19 23:40:27,454 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e2ab836c/5801c6ed91554048880c94f976c808c9/FLAGc50cf5d86 [2020-07-19 23:40:27,836 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e2ab836c/5801c6ed91554048880c94f976c808c9 [2020-07-19 23:40:27,847 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:40:27,851 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:40:27,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:40:27,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:40:27,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:40:27,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:40:27" (1/1) ... [2020-07-19 23:40:27,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76b90e4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:27, skipping insertion in model container [2020-07-19 23:40:27,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:40:27" (1/1) ... [2020-07-19 23:40:27,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:40:27,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:40:28,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:40:28,104 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:40:28,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:40:28,145 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:40:28,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:28 WrapperNode [2020-07-19 23:40:28,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:40:28,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:40:28,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:40:28,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:40:28,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:28" (1/1) ... [2020-07-19 23:40:28,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:28" (1/1) ... [2020-07-19 23:40:28,273 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:28" (1/1) ... [2020-07-19 23:40:28,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:28" (1/1) ... [2020-07-19 23:40:28,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:28" (1/1) ... [2020-07-19 23:40:28,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:28" (1/1) ... [2020-07-19 23:40:28,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:28" (1/1) ... [2020-07-19 23:40:28,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:40:28,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:40:28,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:40:28,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:40:28,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:28" (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 [2020-07-19 23:40:28,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:40:28,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:40:28,373 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 23:40:28,373 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-07-19 23:40:28,373 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:40:28,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:40:28,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 23:40:28,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-19 23:40:28,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 23:40:28,374 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-07-19 23:40:28,374 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:40:28,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:40:28,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:40:28,647 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:40:28,651 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-19 23:40:28,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:40:28 BoogieIcfgContainer [2020-07-19 23:40:28,669 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:40:28,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:40:28,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:40:28,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:40:28,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:40:27" (1/3) ... [2020-07-19 23:40:28,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34762840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:40:28, skipping insertion in model container [2020-07-19 23:40:28,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:40:28" (2/3) ... [2020-07-19 23:40:28,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34762840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:40:28, skipping insertion in model container [2020-07-19 23:40:28,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:40:28" (3/3) ... [2020-07-19 23:40:28,695 INFO L109 eAbstractionObserver]: Analyzing ICFG trex02-2.c [2020-07-19 23:40:28,726 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:40:28,748 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:40:28,768 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:40:28,795 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:40:28,796 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:40:28,796 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:40:28,796 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:40:28,797 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:40:28,797 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:40:28,797 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:40:28,797 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:40:28,819 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-19 23:40:28,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-19 23:40:28,827 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:40:28,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:40:28,829 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:40:28,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:40:28,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1873481772, now seen corresponding path program 1 times [2020-07-19 23:40:28,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:40:28,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498129317] [2020-07-19 23:40:28,851 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1f83c1bc [2020-07-19 23:40:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:40:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:40:29,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498129317] [2020-07-19 23:40:29,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:40:29,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 23:40:29,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206109888] [2020-07-19 23:40:29,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 23:40:29,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:40:29,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 23:40:29,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 23:40:29,039 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-07-19 23:40:29,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:40:29,118 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-07-19 23:40:29,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 23:40:29,121 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-07-19 23:40:29,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:40:29,137 INFO L225 Difference]: With dead ends: 35 [2020-07-19 23:40:29,138 INFO L226 Difference]: Without dead ends: 18 [2020-07-19 23:40:29,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 23:40:29,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-19 23:40:29,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-19 23:40:29,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-19 23:40:29,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-07-19 23:40:29,197 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2020-07-19 23:40:29,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:40:29,198 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-07-19 23:40:29,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 23:40:29,199 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-07-19 23:40:29,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-19 23:40:29,201 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:40:29,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:40:29,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:40:29,202 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:40:29,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:40:29,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1862399520, now seen corresponding path program 1 times [2020-07-19 23:40:29,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:40:29,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914718501] [2020-07-19 23:40:29,204 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1f83c1bc [2020-07-19 23:40:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:40:29,229 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:40:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:40:29,243 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:40:29,265 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-19 23:40:29,265 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-19 23:40:29,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 23:40:29,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 11:40:29 BoogieIcfgContainer [2020-07-19 23:40:29,288 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 23:40:29,291 INFO L168 Benchmark]: Toolchain (without parser) took 1441.36 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 102.2 MB in the beginning and 142.1 MB in the end (delta: -39.9 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. [2020-07-19 23:40:29,293 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 144.7 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-19 23:40:29,294 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.15 ms. Allocated memory is still 144.7 MB. Free memory was 101.7 MB in the beginning and 91.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-19 23:40:29,295 INFO L168 Benchmark]: Boogie Preprocessor took 143.61 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 91.9 MB in the beginning and 180.9 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-19 23:40:29,297 INFO L168 Benchmark]: RCFGBuilder took 377.34 ms. Allocated memory is still 201.9 MB. Free memory was 180.3 MB in the beginning and 167.9 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-07-19 23:40:29,298 INFO L168 Benchmark]: TraceAbstraction took 612.96 ms. Allocated memory is still 201.9 MB. Free memory was 167.3 MB in the beginning and 142.1 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. [2020-07-19 23:40:29,304 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 144.7 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 295.15 ms. Allocated memory is still 144.7 MB. Free memory was 101.7 MB in the beginning and 91.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 143.61 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 91.9 MB in the beginning and 180.9 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 377.34 ms. Allocated memory is still 201.9 MB. Free memory was 180.3 MB in the beginning and 167.9 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 612.96 ms. Allocated memory is still 201.9 MB. Free memory was 167.3 MB in the beginning and 142.1 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] int x; VAL [\old(x)=2, x=0] [L20] x=__VERIFIER_nondet_int() [L21] COND FALSE !(x > 0) VAL [\old(x)=0, x=-1] [L26] CALL __VERIFIER_assert(x==0) VAL [\old(cond)=0, \old(x)=0, x=-1] [L4] COND TRUE !(cond) VAL [\old(cond)=0, \old(x)=0, cond=0, x=-1] [L5] __VERIFIER_error() VAL [\old(cond)=0, \old(x)=0, cond=0, x=-1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 5 SDslu, 10 SDs, 0 SdLazy, 7 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 120 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...