/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s4iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:15:18,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:15:18,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:15:18,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:15:18,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:15:18,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:15:18,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:15:18,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:15:18,734 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:15:18,736 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:15:18,737 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:15:18,738 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:15:18,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:15:18,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:15:18,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:15:18,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:15:18,743 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:15:18,744 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:15:18,746 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:15:18,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:15:18,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:15:18,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:15:18,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:15:18,754 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:15:18,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:15:18,775 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:15:18,776 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:15:18,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:15:18,782 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 [2020-07-17 12:15:18,811 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:15:18,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:15:18,813 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:15:18,813 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:15:18,814 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:15:18,814 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:15:18,814 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:15:18,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:15:18,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:15:18,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:15:18,815 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:15:18,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:15:18,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:15:18,815 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:15:18,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:15:18,821 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:15:18,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:15:18,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:15:18,822 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:15:18,822 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:15:18,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:15:18,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:15:18,823 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:15:18,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:15:18,823 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:15:18,824 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:15:18,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:15:18,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:15:18,824 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:15:18,824 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:15:19,150 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:15:19,165 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:15:19,169 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:15:19,171 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:15:19,172 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:15:19,173 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s4iff.c [2020-07-17 12:15:19,246 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/612f18b1a/569ee8e19105410a8dd45c4faded0636/FLAG53318d961 [2020-07-17 12:15:19,792 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:15:19,793 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s4iff.c [2020-07-17 12:15:19,801 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/612f18b1a/569ee8e19105410a8dd45c4faded0636/FLAG53318d961 [2020-07-17 12:15:20,178 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/612f18b1a/569ee8e19105410a8dd45c4faded0636 [2020-07-17 12:15:20,192 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:15:20,196 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:15:20,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:15:20,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:15:20,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:15:20,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:15:20" (1/1) ... [2020-07-17 12:15:20,207 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e0bcb26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:20, skipping insertion in model container [2020-07-17 12:15:20,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:15:20" (1/1) ... [2020-07-17 12:15:20,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:15:20,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:15:20,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:15:20,442 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:15:20,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:15:20,568 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:15:20,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:20 WrapperNode [2020-07-17 12:15:20,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:15:20,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:15:20,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:15:20,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:15:20,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:20" (1/1) ... [2020-07-17 12:15:20,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:20" (1/1) ... [2020-07-17 12:15:20,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:20" (1/1) ... [2020-07-17 12:15:20,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:20" (1/1) ... [2020-07-17 12:15:20,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:20" (1/1) ... [2020-07-17 12:15:20,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:20" (1/1) ... [2020-07-17 12:15:20,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:20" (1/1) ... [2020-07-17 12:15:20,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:15:20,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:15:20,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:15:20,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:15:20,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:20" (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 [2020-07-17 12:15:20,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:15:20,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:15:20,691 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 12:15:20,691 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 12:15:20,692 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:15:20,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:15:20,692 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 12:15:20,692 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 12:15:20,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 12:15:20,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 12:15:20,693 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-17 12:15:20,693 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:15:20,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 12:15:20,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-17 12:15:20,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 12:15:20,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 12:15:20,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 12:15:20,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:15:20,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:15:21,011 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:15:21,012 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-17 12:15:21,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:15:21 BoogieIcfgContainer [2020-07-17 12:15:21,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:15:21,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:15:21,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:15:21,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:15:21,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:15:20" (1/3) ... [2020-07-17 12:15:21,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4348a9b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:15:21, skipping insertion in model container [2020-07-17 12:15:21,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:20" (2/3) ... [2020-07-17 12:15:21,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4348a9b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:15:21, skipping insertion in model container [2020-07-17 12:15:21,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:15:21" (3/3) ... [2020-07-17 12:15:21,028 INFO L109 eAbstractionObserver]: Analyzing ICFG s4iff.c [2020-07-17 12:15:21,042 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:15:21,052 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:15:21,069 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:15:21,106 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:15:21,107 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:15:21,107 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:15:21,107 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:15:21,107 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:15:21,108 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:15:21,108 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:15:21,108 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:15:21,140 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-17 12:15:21,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-17 12:15:21,146 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:21,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:21,148 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:21,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:21,156 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-17 12:15:21,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:21,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315387768] [2020-07-17 12:15:21,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:21,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315387768] [2020-07-17 12:15:21,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:15:21,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:15:21,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131790964] [2020-07-17 12:15:21,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:15:21,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:21,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:15:21,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:15:21,437 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-07-17 12:15:21,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:21,557 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-07-17 12:15:21,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:15:21,560 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-17 12:15:21,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:21,571 INFO L225 Difference]: With dead ends: 54 [2020-07-17 12:15:21,571 INFO L226 Difference]: Without dead ends: 25 [2020-07-17 12:15:21,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:15:21,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-17 12:15:21,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-17 12:15:21,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-17 12:15:21,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-17 12:15:21,628 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-07-17 12:15:21,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:21,629 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-17 12:15:21,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:15:21,629 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-17 12:15:21,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-17 12:15:21,630 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:21,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:21,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:15:21,631 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:21,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:21,632 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-07-17 12:15:21,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:21,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549200652] [2020-07-17 12:15:21,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:21,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549200652] [2020-07-17 12:15:21,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:15:21,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:15:21,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362210751] [2020-07-17 12:15:21,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:15:21,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:21,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:15:21,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:15:21,823 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-07-17 12:15:21,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:21,946 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-17 12:15:21,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 12:15:21,947 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-17 12:15:21,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:21,948 INFO L225 Difference]: With dead ends: 40 [2020-07-17 12:15:21,949 INFO L226 Difference]: Without dead ends: 30 [2020-07-17 12:15:21,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:15:21,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-17 12:15:21,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-17 12:15:21,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-17 12:15:21,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-17 12:15:21,959 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-17 12:15:21,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:21,959 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-17 12:15:21,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:15:21,960 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-17 12:15:21,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-17 12:15:21,961 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:21,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:21,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 12:15:21,962 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:21,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:21,963 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-17 12:15:21,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:21,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601271050] [2020-07-17 12:15:21,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:22,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601271050] [2020-07-17 12:15:22,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826509409] [2020-07-17 12:15:22,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:22,510 INFO L264 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-17 12:15:22,517 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:15:22,606 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-17 12:15:22,607 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:15:22,617 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:15:22,618 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:15:22,618 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-07-17 12:15:22,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:22,672 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-07-17 12:15:22,673 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:15:22,688 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:15:22,688 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:15:22,689 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-07-17 12:15:22,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:22,964 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:15:22,965 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2020-07-17 12:15:22,968 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:15:23,011 INFO L624 ElimStorePlain]: treesize reduction 24, result has 65.7 percent of original size [2020-07-17 12:15:23,018 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-17 12:15:23,019 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:46 [2020-07-17 12:15:23,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:23,119 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:15:23,120 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 29 [2020-07-17 12:15:23,121 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:15:23,134 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:15:23,136 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:15:23,137 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:53, output treesize:10 [2020-07-17 12:15:23,171 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-17 12:15:23,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:23,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:15:23,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-07-17 12:15:23,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435908186] [2020-07-17 12:15:23,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-17 12:15:23,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:23,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-17 12:15:23,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-07-17 12:15:23,234 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 21 states. [2020-07-17 12:15:24,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:24,044 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-07-17 12:15:24,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 12:15:24,045 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-07-17 12:15:24,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:24,048 INFO L225 Difference]: With dead ends: 49 [2020-07-17 12:15:24,048 INFO L226 Difference]: Without dead ends: 36 [2020-07-17 12:15:24,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2020-07-17 12:15:24,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-17 12:15:24,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-07-17 12:15:24,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-17 12:15:24,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-17 12:15:24,059 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2020-07-17 12:15:24,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:24,060 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-17 12:15:24,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-17 12:15:24,060 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-17 12:15:24,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 12:15:24,061 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:24,061 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:24,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-17 12:15:24,273 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:24,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:24,274 INFO L82 PathProgramCache]: Analyzing trace with hash 531279049, now seen corresponding path program 2 times [2020-07-17 12:15:24,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:24,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434116590] [2020-07-17 12:15:24,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:24,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:24,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434116590] [2020-07-17 12:15:24,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356334812] [2020-07-17 12:15:24,368 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:24,429 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:15:24,429 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:15:24,430 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 12:15:24,433 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:15:24,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:24,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:15:24,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-17 12:15:24,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984241354] [2020-07-17 12:15:24,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 12:15:24,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:24,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 12:15:24,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-17 12:15:24,482 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 11 states. [2020-07-17 12:15:24,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:24,697 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-17 12:15:24,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 12:15:24,698 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-07-17 12:15:24,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:24,700 INFO L225 Difference]: With dead ends: 45 [2020-07-17 12:15:24,700 INFO L226 Difference]: Without dead ends: 39 [2020-07-17 12:15:24,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-07-17 12:15:24,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-17 12:15:24,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-07-17 12:15:24,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-17 12:15:24,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-17 12:15:24,709 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-07-17 12:15:24,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:24,709 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-17 12:15:24,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 12:15:24,709 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-17 12:15:24,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-17 12:15:24,710 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:24,711 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:24,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:24,926 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:24,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:24,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 3 times [2020-07-17 12:15:24,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:24,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657044082] [2020-07-17 12:15:24,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:25,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657044082] [2020-07-17 12:15:25,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102714415] [2020-07-17 12:15:25,022 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:25,079 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-07-17 12:15:25,079 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:15:25,080 INFO L264 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 12:15:25,083 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:15:25,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:25,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:15:25,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-17 12:15:25,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856023206] [2020-07-17 12:15:25,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 12:15:25,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:25,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 12:15:25,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-17 12:15:25,149 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 11 states. [2020-07-17 12:15:25,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:25,343 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-07-17 12:15:25,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 12:15:25,343 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-07-17 12:15:25,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:25,344 INFO L225 Difference]: With dead ends: 49 [2020-07-17 12:15:25,344 INFO L226 Difference]: Without dead ends: 35 [2020-07-17 12:15:25,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-07-17 12:15:25,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-17 12:15:25,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-17 12:15:25,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-17 12:15:25,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-17 12:15:25,352 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-07-17 12:15:25,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:25,353 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-17 12:15:25,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 12:15:25,353 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-17 12:15:25,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-17 12:15:25,354 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:25,354 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:25,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:25,568 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:25,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:25,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 4 times [2020-07-17 12:15:25,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:25,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892526495] [2020-07-17 12:15:25,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 12:15:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 12:15:25,702 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-17 12:15:25,702 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 12:15:25,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 12:15:25,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:15:25 BoogieIcfgContainer [2020-07-17 12:15:25,748 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 12:15:25,750 INFO L168 Benchmark]: Toolchain (without parser) took 5555.89 ms. Allocated memory was 145.2 MB in the beginning and 247.5 MB in the end (delta: 102.2 MB). Free memory was 102.8 MB in the beginning and 172.4 MB in the end (delta: -69.5 MB). Peak memory consumption was 32.7 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:25,751 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 145.2 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. [2020-07-17 12:15:25,752 INFO L168 Benchmark]: CACSL2BoogieTranslator took 372.08 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 102.4 MB in the beginning and 181.1 MB in the end (delta: -78.6 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:25,752 INFO L168 Benchmark]: Boogie Preprocessor took 51.91 ms. Allocated memory is still 202.4 MB. Free memory was 181.1 MB in the beginning and 178.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:25,753 INFO L168 Benchmark]: RCFGBuilder took 395.95 ms. Allocated memory is still 202.4 MB. Free memory was 178.7 MB in the beginning and 162.1 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:25,754 INFO L168 Benchmark]: TraceAbstraction took 4729.02 ms. Allocated memory was 202.4 MB in the beginning and 247.5 MB in the end (delta: 45.1 MB). Free memory was 161.4 MB in the beginning and 172.4 MB in the end (delta: -11.0 MB). Peak memory consumption was 34.1 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:25,758 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 145.2 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 372.08 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 102.4 MB in the beginning and 181.1 MB in the end (delta: -78.6 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 51.91 ms. Allocated memory is still 202.4 MB. Free memory was 181.1 MB in the beginning and 178.7 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 395.95 ms. Allocated memory is still 202.4 MB. Free memory was 178.7 MB in the beginning and 162.1 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4729.02 ms. Allocated memory was 202.4 MB in the beginning and 247.5 MB in the end (delta: 45.1 MB). Free memory was 161.4 MB in the beginning and 172.4 MB in the end (delta: -11.0 MB). Peak memory consumption was 34.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=12, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 1 [L30] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=2, sum={2:0}] [L30] COND TRUE i