/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/s1iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:32:16,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:32:16,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:32:16,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:32:16,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:32:16,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:32:16,446 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:32:16,456 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:32:16,459 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:32:16,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:32:16,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:32:16,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:32:16,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:32:16,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:32:16,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:32:16,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:32:16,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:32:16,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:32:16,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:32:16,483 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:32:16,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:32:16,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:32:16,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:32:16,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:32:16,497 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:32:16,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:32:16,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:32:16,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:32:16,506 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 [2020-07-07 11:32:16,520 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:32:16,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:32:16,522 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:32:16,522 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:32:16,522 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:32:16,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:32:16,523 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:32:16,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:32:16,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:32:16,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:32:16,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:32:16,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:32:16,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:32:16,524 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:32:16,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:32:16,525 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:32:16,525 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:32:16,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:32:16,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:32:16,525 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:32:16,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:32:16,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:32:16,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:32:16,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:32:16,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:32:16,526 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:32:16,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:32:16,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:32:16,527 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:32:16,527 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:32:16,832 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:32:16,851 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:32:16,854 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:32:16,855 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:32:16,855 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:32:16,856 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s1iff.c [2020-07-07 11:32:16,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/435fb122b/07d2d6c8a9c6442a9a225e0510d2754e/FLAG7479ec9fc [2020-07-07 11:32:17,421 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:32:17,421 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s1iff.c [2020-07-07 11:32:17,426 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/435fb122b/07d2d6c8a9c6442a9a225e0510d2754e/FLAG7479ec9fc [2020-07-07 11:32:17,788 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/435fb122b/07d2d6c8a9c6442a9a225e0510d2754e [2020-07-07 11:32:17,799 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:32:17,801 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:32:17,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:32:17,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:32:17,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:32:17,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:32:17" (1/1) ... [2020-07-07 11:32:17,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25a6f723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:17, skipping insertion in model container [2020-07-07 11:32:17,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:32:17" (1/1) ... [2020-07-07 11:32:17,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:32:17,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:32:18,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:32:18,076 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:32:18,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:32:18,210 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:32:18,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:18 WrapperNode [2020-07-07 11:32:18,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:32:18,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:32:18,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:32:18,212 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:32:18,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:18" (1/1) ... [2020-07-07 11:32:18,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:18" (1/1) ... [2020-07-07 11:32:18,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:18" (1/1) ... [2020-07-07 11:32:18,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:18" (1/1) ... [2020-07-07 11:32:18,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:18" (1/1) ... [2020-07-07 11:32:18,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:18" (1/1) ... [2020-07-07 11:32:18,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:18" (1/1) ... [2020-07-07 11:32:18,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:32:18,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:32:18,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:32:18,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:32:18,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:18" (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 [2020-07-07 11:32:18,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:32:18,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:32:18,319 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 11:32:18,319 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 11:32:18,319 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:32:18,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:32:18,321 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 11:32:18,321 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 11:32:18,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 11:32:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:32:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-07 11:32:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:32:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 11:32:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-07 11:32:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 11:32:18,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 11:32:18,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 11:32:18,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:32:18,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:32:18,616 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:32:18,616 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-07 11:32:18,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:32:18 BoogieIcfgContainer [2020-07-07 11:32:18,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:32:18,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:32:18,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:32:18,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:32:18,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:32:17" (1/3) ... [2020-07-07 11:32:18,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@757b4a98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:32:18, skipping insertion in model container [2020-07-07 11:32:18,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:18" (2/3) ... [2020-07-07 11:32:18,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@757b4a98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:32:18, skipping insertion in model container [2020-07-07 11:32:18,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:32:18" (3/3) ... [2020-07-07 11:32:18,628 INFO L109 eAbstractionObserver]: Analyzing ICFG s1iff.c [2020-07-07 11:32:18,638 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:32:18,644 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:32:18,656 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:32:18,675 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:32:18,676 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:32:18,676 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:32:18,676 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:32:18,676 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:32:18,676 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:32:18,676 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:32:18,676 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:32:18,691 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-07 11:32:18,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-07 11:32:18,696 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:18,696 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] [2020-07-07 11:32:18,697 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:18,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:18,701 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-07 11:32:18,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:18,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854131055] [2020-07-07 11:32:18,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:18,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854131055] [2020-07-07 11:32:18,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:32:18,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:32:18,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135271211] [2020-07-07 11:32:18,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:32:18,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:18,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:32:18,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:32:18,941 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-07-07 11:32:19,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:19,055 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-07-07 11:32:19,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:32:19,057 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-07 11:32:19,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:19,066 INFO L225 Difference]: With dead ends: 54 [2020-07-07 11:32:19,066 INFO L226 Difference]: Without dead ends: 25 [2020-07-07 11:32:19,070 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 [2020-07-07 11:32:19,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-07 11:32:19,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-07 11:32:19,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-07 11:32:19,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-07 11:32:19,105 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-07-07 11:32:19,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:19,106 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-07 11:32:19,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:32:19,107 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-07 11:32:19,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-07 11:32:19,108 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:19,108 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] [2020-07-07 11:32:19,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:32:19,109 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:19,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:19,110 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-07-07 11:32:19,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:19,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761544984] [2020-07-07 11:32:19,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:19,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:19,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761544984] [2020-07-07 11:32:19,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:32:19,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:32:19,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112530753] [2020-07-07 11:32:19,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:32:19,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:19,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:32:19,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:32:19,258 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-07-07 11:32:19,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:19,368 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-07 11:32:19,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:32:19,369 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-07 11:32:19,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:19,370 INFO L225 Difference]: With dead ends: 40 [2020-07-07 11:32:19,370 INFO L226 Difference]: Without dead ends: 30 [2020-07-07 11:32:19,371 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 [2020-07-07 11:32:19,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-07 11:32:19,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-07 11:32:19,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-07 11:32:19,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-07 11:32:19,380 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-07 11:32:19,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:19,380 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-07 11:32:19,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:32:19,381 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-07 11:32:19,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-07 11:32:19,382 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:19,382 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] [2020-07-07 11:32:19,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:32:19,382 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:19,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:19,383 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-07 11:32:19,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:19,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621082058] [2020-07-07 11:32:19,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:20,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:20,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621082058] [2020-07-07 11:32:20,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181864683] [2020-07-07 11:32:20,019 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 [2020-07-07 11:32:20,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:20,079 INFO L264 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-07 11:32:20,087 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:20,167 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 [2020-07-07 11:32:20,168 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:20,182 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:32:20,183 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:32:20,183 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-07-07 11:32:20,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:20,237 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 [2020-07-07 11:32:20,238 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:20,250 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:32:20,251 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:32:20,252 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-07-07 11:32:20,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:20,506 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:32:20,507 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 [2020-07-07 11:32:20,509 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:20,548 INFO L624 ElimStorePlain]: treesize reduction 24, result has 65.7 percent of original size [2020-07-07 11:32:20,554 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. [2020-07-07 11:32:20,554 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:46 [2020-07-07 11:32:20,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:20,648 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:32:20,649 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 [2020-07-07 11:32:20,650 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:20,661 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:32:20,663 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:32:20,664 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:53, output treesize:10 [2020-07-07 11:32:20,695 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:32:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:20,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:32:20,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2020-07-07 11:32:20,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147144569] [2020-07-07 11:32:20,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-07 11:32:20,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:20,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-07 11:32:20,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2020-07-07 11:32:20,757 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 22 states. [2020-07-07 11:32:21,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:21,587 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-07-07 11:32:21,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 11:32:21,588 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-07-07 11:32:21,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:21,591 INFO L225 Difference]: With dead ends: 49 [2020-07-07 11:32:21,591 INFO L226 Difference]: Without dead ends: 36 [2020-07-07 11:32:21,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2020-07-07 11:32:21,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-07 11:32:21,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-07-07 11:32:21,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-07 11:32:21,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-07 11:32:21,601 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2020-07-07 11:32:21,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:21,601 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-07 11:32:21,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-07 11:32:21,601 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-07 11:32:21,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-07 11:32:21,602 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:21,603 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] [2020-07-07 11:32:21,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-07 11:32:21,815 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:21,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:21,816 INFO L82 PathProgramCache]: Analyzing trace with hash 531279049, now seen corresponding path program 2 times [2020-07-07 11:32:21,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:21,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498170954] [2020-07-07 11:32:21,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:21,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:21,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498170954] [2020-07-07 11:32:21,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824467392] [2020-07-07 11:32:21,917 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 [2020-07-07 11:32:21,956 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:32:21,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:32:21,957 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:32:21,960 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:22,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:32:22,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-07 11:32:22,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755983733] [2020-07-07 11:32:22,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:32:22,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:22,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:32:22,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:32:22,005 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 11 states. [2020-07-07 11:32:22,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:22,234 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-07 11:32:22,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 11:32:22,235 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-07-07 11:32:22,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:22,236 INFO L225 Difference]: With dead ends: 45 [2020-07-07 11:32:22,236 INFO L226 Difference]: Without dead ends: 39 [2020-07-07 11:32:22,237 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 [2020-07-07 11:32:22,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-07 11:32:22,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-07-07 11:32:22,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-07 11:32:22,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-07 11:32:22,252 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-07-07 11:32:22,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:22,253 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-07 11:32:22,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:32:22,254 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-07 11:32:22,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-07 11:32:22,256 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:22,256 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] [2020-07-07 11:32:22,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:22,471 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:22,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:22,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 3 times [2020-07-07 11:32:22,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:22,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038575366] [2020-07-07 11:32:22,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:22,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038575366] [2020-07-07 11:32:22,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216881918] [2020-07-07 11:32:22,602 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 [2020-07-07 11:32:22,662 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-07-07 11:32:22,662 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:32:22,663 INFO L264 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:32:22,665 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:22,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:32:22,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-07 11:32:22,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740533453] [2020-07-07 11:32:22,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:32:22,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:22,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:32:22,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:32:22,711 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 11 states. [2020-07-07 11:32:22,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:22,887 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-07-07 11:32:22,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 11:32:22,888 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-07-07 11:32:22,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:22,889 INFO L225 Difference]: With dead ends: 49 [2020-07-07 11:32:22,889 INFO L226 Difference]: Without dead ends: 35 [2020-07-07 11:32:22,890 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 [2020-07-07 11:32:22,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-07 11:32:22,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-07 11:32:22,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-07 11:32:22,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-07 11:32:22,896 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-07-07 11:32:22,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:22,897 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-07 11:32:22,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:32:22,897 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-07 11:32:22,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-07 11:32:22,898 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:22,898 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] [2020-07-07 11:32:23,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:23,114 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:23,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:23,115 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 4 times [2020-07-07 11:32:23,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:23,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308906276] [2020-07-07 11:32:23,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:32:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:32:23,182 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-07 11:32:23,182 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 11:32:23,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 11:32:23,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:32:23 BoogieIcfgContainer [2020-07-07 11:32:23,225 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:32:23,226 INFO L168 Benchmark]: Toolchain (without parser) took 5426.09 ms. Allocated memory was 142.1 MB in the beginning and 244.3 MB in the end (delta: 102.2 MB). Free memory was 103.7 MB in the beginning and 147.4 MB in the end (delta: -43.8 MB). Peak memory consumption was 58.5 MB. Max. memory is 7.1 GB. [2020-07-07 11:32:23,227 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 142.1 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 11:32:23,228 INFO L168 Benchmark]: CACSL2BoogieTranslator took 409.37 ms. Allocated memory was 142.1 MB in the beginning and 204.5 MB in the end (delta: 62.4 MB). Free memory was 103.5 MB in the beginning and 183.7 MB in the end (delta: -80.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. [2020-07-07 11:32:23,229 INFO L168 Benchmark]: Boogie Preprocessor took 37.06 ms. Allocated memory is still 204.5 MB. Free memory was 183.7 MB in the beginning and 181.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-07-07 11:32:23,230 INFO L168 Benchmark]: RCFGBuilder took 371.29 ms. Allocated memory is still 204.5 MB. Free memory was 181.4 MB in the beginning and 164.2 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. [2020-07-07 11:32:23,230 INFO L168 Benchmark]: TraceAbstraction took 4603.37 ms. Allocated memory was 204.5 MB in the beginning and 244.3 MB in the end (delta: 39.8 MB). Free memory was 164.2 MB in the beginning and 147.4 MB in the end (delta: 16.8 MB). Peak memory consumption was 56.6 MB. Max. memory is 7.1 GB. [2020-07-07 11:32:23,234 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 142.1 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 409.37 ms. Allocated memory was 142.1 MB in the beginning and 204.5 MB in the end (delta: 62.4 MB). Free memory was 103.5 MB in the beginning and 183.7 MB in the end (delta: -80.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 37.06 ms. Allocated memory is still 204.5 MB. Free memory was 183.7 MB in the beginning and 181.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 371.29 ms. Allocated memory is still 204.5 MB. Free memory was 181.4 MB in the beginning and 164.2 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4603.37 ms. Allocated memory was 204.5 MB in the beginning and 244.3 MB in the end (delta: 39.8 MB). Free memory was 164.2 MB in the beginning and 147.4 MB in the end (delta: 16.8 MB). Peak memory consumption was 56.6 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)=10, 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={5:0}] [L30] COND TRUE i