/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/ldv-regression/test09.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 05:46:46,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 05:46:46,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 05:46:46,138 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 05:46:46,139 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 05:46:46,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 05:46:46,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 05:46:46,143 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 05:46:46,145 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 05:46:46,146 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 05:46:46,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 05:46:46,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 05:46:46,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 05:46:46,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 05:46:46,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 05:46:46,151 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 05:46:46,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 05:46:46,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 05:46:46,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 05:46:46,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 05:46:46,159 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 05:46:46,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 05:46:46,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 05:46:46,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 05:46:46,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 05:46:46,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 05:46:46,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 05:46:46,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 05:46:46,174 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 05:46:46,195 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 05:46:46,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 05:46:46,197 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 05:46:46,197 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 05:46:46,197 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 05:46:46,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 05:46:46,197 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 05:46:46,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 05:46:46,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 05:46:46,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 05:46:46,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 05:46:46,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 05:46:46,198 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 05:46:46,199 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 05:46:46,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 05:46:46,199 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 05:46:46,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 05:46:46,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 05:46:46,200 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 05:46:46,200 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 05:46:46,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 05:46:46,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 05:46:46,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 05:46:46,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 05:46:46,201 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 05:46:46,201 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 05:46:46,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 05:46:46,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 05:46:46,201 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 05:46:46,202 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 05:46:46,486 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 05:46:46,498 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 05:46:46,502 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 05:46:46,503 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 05:46:46,504 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 05:46:46,505 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test09.c [2020-07-20 05:46:46,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6750ce9de/885f85baa808405aa75bc74611c7bc2f/FLAG75a7ab4ad [2020-07-20 05:46:47,056 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 05:46:47,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test09.c [2020-07-20 05:46:47,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6750ce9de/885f85baa808405aa75bc74611c7bc2f/FLAG75a7ab4ad [2020-07-20 05:46:47,429 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6750ce9de/885f85baa808405aa75bc74611c7bc2f [2020-07-20 05:46:47,438 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 05:46:47,441 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 05:46:47,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 05:46:47,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 05:46:47,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 05:46:47,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:46:47" (1/1) ... [2020-07-20 05:46:47,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@81328f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:47, skipping insertion in model container [2020-07-20 05:46:47,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:46:47" (1/1) ... [2020-07-20 05:46:47,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 05:46:47,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 05:46:47,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:46:47,670 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 05:46:47,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:46:47,705 INFO L208 MainTranslator]: Completed translation [2020-07-20 05:46:47,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:47 WrapperNode [2020-07-20 05:46:47,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 05:46:47,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 05:46:47,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 05:46:47,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 05:46:47,795 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:47" (1/1) ... [2020-07-20 05:46:47,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:47" (1/1) ... [2020-07-20 05:46:47,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:47" (1/1) ... [2020-07-20 05:46:47,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:47" (1/1) ... [2020-07-20 05:46:47,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:47" (1/1) ... [2020-07-20 05:46:47,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:47" (1/1) ... [2020-07-20 05:46:47,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:47" (1/1) ... [2020-07-20 05:46:47,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 05:46:47,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 05:46:47,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 05:46:47,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 05:46:47,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:47" (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 05:46:47,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 05:46:47,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 05:46:47,884 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-07-20 05:46:47,884 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 05:46:47,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 05:46:47,885 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-07-20 05:46:47,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 05:46:47,885 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 05:46:47,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 05:46:47,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 05:46:47,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 05:46:47,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-20 05:46:47,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 05:46:47,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 05:46:48,203 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 05:46:48,203 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 05:46:48,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:46:48 BoogieIcfgContainer [2020-07-20 05:46:48,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 05:46:48,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 05:46:48,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 05:46:48,229 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 05:46:48,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:46:47" (1/3) ... [2020-07-20 05:46:48,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15330619 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:46:48, skipping insertion in model container [2020-07-20 05:46:48,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:46:47" (2/3) ... [2020-07-20 05:46:48,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15330619 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:46:48, skipping insertion in model container [2020-07-20 05:46:48,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:46:48" (3/3) ... [2020-07-20 05:46:48,233 INFO L109 eAbstractionObserver]: Analyzing ICFG test09.c [2020-07-20 05:46:48,245 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 05:46:48,252 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 05:46:48,265 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 05:46:48,290 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 05:46:48,290 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 05:46:48,290 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 05:46:48,291 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 05:46:48,291 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 05:46:48,291 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 05:46:48,291 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 05:46:48,291 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 05:46:48,307 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-20 05:46:48,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 05:46:48,312 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:48,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:46:48,313 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:48,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:48,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1889415219, now seen corresponding path program 1 times [2020-07-20 05:46:48,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:48,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119349932] [2020-07-20 05:46:48,326 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ce4a76e [2020-07-20 05:46:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:48,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:48,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:48,653 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 05:46:48,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119349932] [2020-07-20 05:46:48,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:48,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 05:46:48,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360495450] [2020-07-20 05:46:48,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 05:46:48,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:48,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 05:46:48,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 05:46:48,680 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 6 states. [2020-07-20 05:46:48,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:48,947 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-07-20 05:46:48,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 05:46:48,953 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-07-20 05:46:48,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:48,970 INFO L225 Difference]: With dead ends: 33 [2020-07-20 05:46:48,970 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 05:46:48,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 05:46:48,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 05:46:49,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 05:46:49,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 05:46:49,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2020-07-20 05:46:49,033 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 14 [2020-07-20 05:46:49,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:49,034 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2020-07-20 05:46:49,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 05:46:49,035 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2020-07-20 05:46:49,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 05:46:49,036 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:46:49,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:46:49,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 05:46:49,037 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:46:49,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:46:49,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1918044370, now seen corresponding path program 1 times [2020-07-20 05:46:49,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:46:49,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498243764] [2020-07-20 05:46:49,041 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ce4a76e [2020-07-20 05:46:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:49,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:49,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:46:49,332 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 05:46:49,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498243764] [2020-07-20 05:46:49,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:46:49,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 05:46:49,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181330966] [2020-07-20 05:46:49,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 05:46:49,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:46:49,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 05:46:49,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-20 05:46:49,337 INFO L87 Difference]: Start difference. First operand 15 states and 14 transitions. Second operand 8 states. [2020-07-20 05:46:49,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:46:49,629 INFO L93 Difference]: Finished difference Result 15 states and 14 transitions. [2020-07-20 05:46:49,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 05:46:49,630 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-07-20 05:46:49,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:46:49,630 INFO L225 Difference]: With dead ends: 15 [2020-07-20 05:46:49,630 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 05:46:49,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-07-20 05:46:49,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 05:46:49,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 05:46:49,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 05:46:49,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 05:46:49,633 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-07-20 05:46:49,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:46:49,634 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 05:46:49,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 05:46:49,634 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 05:46:49,634 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 05:46:49,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 05:46:49,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 05:46:49,887 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 05:46:49,887 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |~#a~0.base| |old(~#a~0.base)|) (= |~#b~0.base| |old(~#b~0.base)|) (= |#valid| |old(#valid)|) (= |~#b~0.offset| |old(~#b~0.offset)|) (= ~p2~0.offset |old(~p2~0.offset)|) (= |#NULL.base| |old(#NULL.base)|) (= ~p2~0.base |old(~p2~0.base)|) (= ~p1~0.offset |old(~p1~0.offset)|) (= ~p1~0.base |old(~p1~0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |~#a~0.offset| |old(~#a~0.offset)|) (= |old(#length)| |#length|)) [2020-07-20 05:46:49,888 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 05:46:49,888 INFO L268 CegarLoopResult]: For program point L9(lines 9 14) no Hoare annotation was computed. [2020-07-20 05:46:49,888 INFO L268 CegarLoopResult]: For program point fEXIT(lines 7 15) no Hoare annotation was computed. [2020-07-20 05:46:49,888 INFO L264 CegarLoopResult]: At program point fENTRY(lines 7 15) the Hoare annotation is: (or (not (= 1 (select (select |#memory_int| ~p2~0.base) ~p2~0.offset))) (= |~#b~0.base| |~#a~0.base|) (not (= |old(~p1~0.base)| |~#a~0.base|)) (and (= |old(~p1~0.offset)| ~p1~0.offset) (= |~#a~0.base| ~p1~0.base)) (not (= |old(~p1~0.offset)| |~#a~0.offset|))) [2020-07-20 05:46:49,888 INFO L268 CegarLoopResult]: For program point fFINAL(lines 7 15) no Hoare annotation was computed. [2020-07-20 05:46:49,889 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 05:46:49,889 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (and (not (= |~#b~0.base| |~#a~0.base|)) (= ~p2~0.offset ~p1~0.offset) (= ~p2~0.base ~p1~0.base)) [2020-07-20 05:46:49,889 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 05:46:49,889 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 05:46:49,889 INFO L264 CegarLoopResult]: At program point L32(lines 17 39) the Hoare annotation is: (or (= |~#a~0.base| |~#b~0.base|) (not (= |old(~p2~0.offset)| |old(~p1~0.offset)|)) (not (= |old(~p1~0.base)| |old(~p2~0.base)|))) [2020-07-20 05:46:49,890 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 37) no Hoare annotation was computed. [2020-07-20 05:46:49,890 INFO L268 CegarLoopResult]: For program point L31(lines 31 33) no Hoare annotation was computed. [2020-07-20 05:46:49,890 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 17 39) the Hoare annotation is: (or (not (= |old(~p2~0.offset)| |old(~p1~0.offset)|)) (not (= |old(~p1~0.base)| |old(~p2~0.base)|)) (= |~#b~0.base| |~#a~0.base|) (and (= |old(~p2~0.offset)| ~p2~0.offset) (= |old(~p1~0.offset)| ~p1~0.offset) (= ~p2~0.base |old(~p2~0.base)|) (= ~p2~0.base ~p1~0.base))) [2020-07-20 05:46:49,890 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 39) no Hoare annotation was computed. [2020-07-20 05:46:49,891 INFO L264 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (or (not (= |old(~p2~0.offset)| |old(~p1~0.offset)|)) (not (= |old(~p1~0.base)| |old(~p2~0.base)|)) (= |~#b~0.base| |~#a~0.base|) (and (= 1 (select (select |#memory_int| ~p2~0.base) ~p2~0.offset)) (= ~p1~0.offset |~#a~0.offset|) (= |~#a~0.base| ~p1~0.base))) [2020-07-20 05:46:49,891 INFO L268 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-07-20 05:46:49,891 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 39) no Hoare annotation was computed. [2020-07-20 05:46:49,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:46:49 BoogieIcfgContainer [2020-07-20 05:46:49,913 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 05:46:49,917 INFO L168 Benchmark]: Toolchain (without parser) took 2475.78 ms. Allocated memory was 138.4 MB in the beginning and 234.9 MB in the end (delta: 96.5 MB). Free memory was 103.0 MB in the beginning and 141.2 MB in the end (delta: -38.2 MB). Peak memory consumption was 58.3 MB. Max. memory is 7.1 GB. [2020-07-20 05:46:49,918 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 05:46:49,919 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.27 ms. Allocated memory is still 138.4 MB. Free memory was 102.5 MB in the beginning and 92.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-20 05:46:49,920 INFO L168 Benchmark]: Boogie Preprocessor took 109.72 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.7 MB in the beginning and 180.6 MB in the end (delta: -87.9 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-20 05:46:49,921 INFO L168 Benchmark]: RCFGBuilder took 404.06 ms. Allocated memory is still 202.4 MB. Free memory was 180.6 MB in the beginning and 165.3 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2020-07-20 05:46:49,922 INFO L168 Benchmark]: TraceAbstraction took 1689.24 ms. Allocated memory was 202.4 MB in the beginning and 234.9 MB in the end (delta: 32.5 MB). Free memory was 164.7 MB in the beginning and 141.2 MB in the end (delta: 23.5 MB). Peak memory consumption was 56.0 MB. Max. memory is 7.1 GB. [2020-07-20 05:46:49,927 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.27 ms. Allocated memory is still 138.4 MB. Free memory was 102.5 MB in the beginning and 92.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.72 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.7 MB in the beginning and 180.6 MB in the end (delta: -87.9 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 404.06 ms. Allocated memory is still 202.4 MB. Free memory was 180.6 MB in the beginning and 165.3 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1689.24 ms. Allocated memory was 202.4 MB in the beginning and 234.9 MB in the end (delta: 32.5 MB). Free memory was 164.7 MB in the beginning and 141.2 MB in the end (delta: 23.5 MB). Peak memory consumption was 56.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 37]: 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: 17]: Loop Invariant Derived loop invariant: (a == b || !(\old(p2) == \old(p1))) || !(\old(p1) == \old(p2)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 13 SDslu, 36 SDs, 0 SdLazy, 67 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s 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, 7 PreInvPairs, 7 NumberOfFragments, 139 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 85 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 2990 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 correct! Received shutdown request...