/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/ifeqn4f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:56:24,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:56:24,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:56:24,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:56:24,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:56:24,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:56:24,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:56:24,333 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:56:24,334 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:56:24,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:56:24,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:56:24,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:56:24,337 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:56:24,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:56:24,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:56:24,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:56:24,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:56:24,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:56:24,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:56:24,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:56:24,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:56:24,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:56:24,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:56:24,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:56:24,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:56:24,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:56:24,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:56:24,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:56:24,374 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 [2020-08-22 16:56:24,415 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:56:24,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:56:24,417 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:56:24,417 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:56:24,417 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:56:24,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:56:24,417 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:56:24,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:56:24,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:56:24,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:56:24,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:56:24,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:56:24,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:56:24,419 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:56:24,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:56:24,419 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:56:24,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:56:24,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:56:24,420 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:56:24,420 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:56:24,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:56:24,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:56:24,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:56:24,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:56:24,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:56:24,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:56:24,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:56:24,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:56:24,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:56:24,422 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:56:24,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:56:24,758 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:56:24,762 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:56:24,770 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:56:24,770 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:56:24,771 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn4f.c [2020-08-22 16:56:24,842 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c61e46307/961cca8931ab46d199381e22b02e33be/FLAG8ecf0142b [2020-08-22 16:56:25,313 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:56:25,314 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn4f.c [2020-08-22 16:56:25,323 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c61e46307/961cca8931ab46d199381e22b02e33be/FLAG8ecf0142b [2020-08-22 16:56:25,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c61e46307/961cca8931ab46d199381e22b02e33be [2020-08-22 16:56:25,652 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:56:25,654 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:56:25,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:56:25,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:56:25,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:56:25,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:56:25" (1/1) ... [2020-08-22 16:56:25,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7092b1a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:25, skipping insertion in model container [2020-08-22 16:56:25,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:56:25" (1/1) ... [2020-08-22 16:56:25,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:56:25,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:56:25,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:56:25,887 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:56:25,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:56:25,929 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:56:25,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:25 WrapperNode [2020-08-22 16:56:25,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:56:25,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:56:25,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:56:25,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:56:26,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:25" (1/1) ... [2020-08-22 16:56:26,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:25" (1/1) ... [2020-08-22 16:56:26,042 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:25" (1/1) ... [2020-08-22 16:56:26,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:25" (1/1) ... [2020-08-22 16:56:26,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:25" (1/1) ... [2020-08-22 16:56:26,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:25" (1/1) ... [2020-08-22 16:56:26,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:25" (1/1) ... [2020-08-22 16:56:26,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:56:26,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:56:26,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:56:26,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:56:26,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:25" (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 [2020-08-22 16:56:26,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:56:26,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:56:26,138 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 16:56:26,138 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 16:56:26,138 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:56:26,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:56:26,138 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 16:56:26,139 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 16:56:26,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 16:56:26,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:56:26,139 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 16:56:26,139 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:56:26,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 16:56:26,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 16:56:26,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 16:56:26,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:56:26,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:56:26,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 16:56:26,468 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:56:26,468 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 16:56:26,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:56:26 BoogieIcfgContainer [2020-08-22 16:56:26,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:56:26,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:56:26,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:56:26,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:56:26,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:56:25" (1/3) ... [2020-08-22 16:56:26,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b2b4027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:56:26, skipping insertion in model container [2020-08-22 16:56:26,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:25" (2/3) ... [2020-08-22 16:56:26,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b2b4027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:56:26, skipping insertion in model container [2020-08-22 16:56:26,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:56:26" (3/3) ... [2020-08-22 16:56:26,480 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn4f.c [2020-08-22 16:56:26,491 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:56:26,496 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:56:26,509 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:56:26,534 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:56:26,534 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:56:26,534 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:56:26,534 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:56:26,535 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:56:26,535 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:56:26,535 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:56:26,535 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:56:26,553 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-08-22 16:56:26,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 16:56:26,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:26,559 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] [2020-08-22 16:56:26,560 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:26,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:26,565 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-08-22 16:56:26,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:26,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426396660] [2020-08-22 16:56:26,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:26,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:26,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 16:56:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:56:26,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426396660] [2020-08-22 16:56:26,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:56:26,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:56:26,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960032057] [2020-08-22 16:56:26,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:56:26,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:26,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:56:26,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:56:26,818 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-08-22 16:56:26,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:26,946 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-08-22 16:56:26,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:56:26,949 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 16:56:26,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:26,959 INFO L225 Difference]: With dead ends: 62 [2020-08-22 16:56:26,960 INFO L226 Difference]: Without dead ends: 31 [2020-08-22 16:56:26,964 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 [2020-08-22 16:56:26,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-22 16:56:27,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-22 16:56:27,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 16:56:27,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-08-22 16:56:27,010 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-08-22 16:56:27,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:27,011 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-08-22 16:56:27,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:56:27,012 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-08-22 16:56:27,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 16:56:27,013 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:27,013 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] [2020-08-22 16:56:27,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:56:27,014 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:27,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:27,014 INFO L82 PathProgramCache]: Analyzing trace with hash -2054124171, now seen corresponding path program 1 times [2020-08-22 16:56:27,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:27,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476045645] [2020-08-22 16:56:27,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:27,038 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:56:27,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227501817] [2020-08-22 16:56:27,039 INFO L95 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 [2020-08-22 16:56:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:27,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-08-22 16:56:27,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:56:27,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476045645] [2020-08-22 16:56:27,167 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:56:27,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227501817] [2020-08-22 16:56:27,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:56:27,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 16:56:27,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181393136] [2020-08-22 16:56:27,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:56:27,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:27,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:56:27,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:56:27,170 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-08-22 16:56:27,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:27,244 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-08-22 16:56:27,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 16:56:27,245 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-08-22 16:56:27,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:27,248 INFO L225 Difference]: With dead ends: 56 [2020-08-22 16:56:27,248 INFO L226 Difference]: Without dead ends: 41 [2020-08-22 16:56:27,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:56:27,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-22 16:56:27,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-08-22 16:56:27,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 16:56:27,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-08-22 16:56:27,262 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-08-22 16:56:27,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:27,263 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-08-22 16:56:27,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:56:27,263 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-08-22 16:56:27,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 16:56:27,264 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:27,264 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, 1, 1] [2020-08-22 16:56:27,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-08-22 16:56:27,480 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:27,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:27,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-08-22 16:56:27,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:27,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248619109] [2020-08-22 16:56:27,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:27,515 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:56:27,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370767338] [2020-08-22 16:56:27,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-08-22 16:56:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:27,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2020-08-22 16:56:27,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:27,636 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 [2020-08-22 16:56:27,637 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:56:27,644 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:56:27,645 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:56:27,645 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-08-22 16:56:27,711 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:56:27,711 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-08-22 16:56:27,713 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-08-22 16:56:27,725 INFO L625 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-08-22 16:56:27,725 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:56:27,726 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-08-22 16:56:27,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:56:27,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248619109] [2020-08-22 16:56:27,759 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:56:27,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370767338] [2020-08-22 16:56:27,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:56:27,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 16:56:27,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976298175] [2020-08-22 16:56:27,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 16:56:27,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:27,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 16:56:27,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:56:27,762 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-08-22 16:56:27,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:27,875 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-08-22 16:56:27,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:56:27,876 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-08-22 16:56:27,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:27,878 INFO L225 Difference]: With dead ends: 52 [2020-08-22 16:56:27,878 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 16:56:27,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:56:27,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 16:56:27,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-08-22 16:56:27,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-22 16:56:27,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-08-22 16:56:27,888 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 28 [2020-08-22 16:56:27,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:27,889 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-08-22 16:56:27,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 16:56:27,889 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-08-22 16:56:27,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 16:56:27,890 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:27,891 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, 1, 1] [2020-08-22 16:56:28,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:28,106 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:28,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:28,107 INFO L82 PathProgramCache]: Analyzing trace with hash -797560546, now seen corresponding path program 1 times [2020-08-22 16:56:28,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:28,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057305280] [2020-08-22 16:56:28,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:28,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:28,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 16:56:28,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:56:28,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057305280] [2020-08-22 16:56:28,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:56:28,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 16:56:28,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933244214] [2020-08-22 16:56:28,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:56:28,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:28,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:56:28,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:56:28,181 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 4 states. [2020-08-22 16:56:28,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:28,277 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-08-22 16:56:28,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 16:56:28,277 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-08-22 16:56:28,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:28,279 INFO L225 Difference]: With dead ends: 74 [2020-08-22 16:56:28,279 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 16:56:28,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:56:28,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 16:56:28,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-08-22 16:56:28,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-22 16:56:28,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-08-22 16:56:28,288 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 28 [2020-08-22 16:56:28,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:28,289 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-08-22 16:56:28,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:56:28,289 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-08-22 16:56:28,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 16:56:28,290 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:28,290 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, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:28,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 16:56:28,291 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:28,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:28,291 INFO L82 PathProgramCache]: Analyzing trace with hash -622618382, now seen corresponding path program 1 times [2020-08-22 16:56:28,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:28,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92456593] [2020-08-22 16:56:28,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:28,311 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:56:28,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963138944] [2020-08-22 16:56:28,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-08-22 16:56:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:28,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-08-22 16:56:28,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:56:28,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92456593] [2020-08-22 16:56:28,437 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:56:28,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963138944] [2020-08-22 16:56:28,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:56:28,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 16:56:28,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019139295] [2020-08-22 16:56:28,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 16:56:28,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:28,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 16:56:28,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:56:28,440 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 7 states. [2020-08-22 16:56:28,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:28,599 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2020-08-22 16:56:28,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 16:56:28,600 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-08-22 16:56:28,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:28,601 INFO L225 Difference]: With dead ends: 91 [2020-08-22 16:56:28,602 INFO L226 Difference]: Without dead ends: 55 [2020-08-22 16:56:28,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:56:28,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-22 16:56:28,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2020-08-22 16:56:28,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 16:56:28,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-08-22 16:56:28,611 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-08-22 16:56:28,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:28,611 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-08-22 16:56:28,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 16:56:28,612 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-08-22 16:56:28,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 16:56:28,613 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:28,613 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:56:28,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:28,826 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:28,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:28,827 INFO L82 PathProgramCache]: Analyzing trace with hash 60389999, now seen corresponding path program 1 times [2020-08-22 16:56:28,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:28,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114124598] [2020-08-22 16:56:28,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:28,870 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:56:28,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [723680207] [2020-08-22 16:56:28,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:56:28,932 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:56:28,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:56:28,955 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:56:28,986 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-08-22 16:56:28,986 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:56:29,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:29,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:56:29 BoogieIcfgContainer [2020-08-22 16:56:29,250 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:56:29,252 INFO L168 Benchmark]: Toolchain (without parser) took 3597.74 ms. Allocated memory was 147.3 MB in the beginning and 235.4 MB in the end (delta: 88.1 MB). Free memory was 103.4 MB in the beginning and 102.9 MB in the end (delta: 476.1 kB). Peak memory consumption was 88.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:29,252 INFO L168 Benchmark]: CDTParser took 0.45 ms. Allocated memory is still 147.3 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 16:56:29,253 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.72 ms. Allocated memory is still 147.3 MB. Free memory was 103.2 MB in the beginning and 92.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:29,254 INFO L168 Benchmark]: Boogie Preprocessor took 149.05 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 92.4 MB in the beginning and 180.1 MB in the end (delta: -87.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:29,255 INFO L168 Benchmark]: RCFGBuilder took 393.05 ms. Allocated memory is still 202.9 MB. Free memory was 180.1 MB in the beginning and 162.3 MB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:29,256 INFO L168 Benchmark]: TraceAbstraction took 2776.30 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 162.3 MB in the beginning and 102.9 MB in the end (delta: 59.4 MB). Peak memory consumption was 91.9 MB. Max. memory is 7.1 GB. [2020-08-22 16:56:29,260 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45 ms. Allocated memory is still 147.3 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 272.72 ms. Allocated memory is still 147.3 MB. Free memory was 103.2 MB in the beginning and 92.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 149.05 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 92.4 MB in the beginning and 180.1 MB in the end (delta: -87.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 393.05 ms. Allocated memory is still 202.9 MB. Free memory was 180.1 MB in the beginning and 162.3 MB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2776.30 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 162.3 MB in the beginning and 102.9 MB in the end (delta: 59.4 MB). Peak memory consumption was 91.9 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)=7, 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 *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] i=0 VAL [\old(N)=0, a={-2:0}, b={-1:0}, i=0, malloc(sizeof(long long)*N)={-1:0}, malloc(sizeof(long long)*N)={-2:0}, N=2] [L29] COND TRUE i