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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/nla-digbench/lcm1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:26:19,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:26:19,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:26:19,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 13:26:19,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 13:26:19,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 13:26:19,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 13:26:19,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 13:26:19,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 13:26:19,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 13:26:19,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 13:26:19,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-09-20 13:26:19,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:26:19,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:26:19,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:26:19,605 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-20 13:26:19,620 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:26:19,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:26:19,620 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:26:19,620 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:26:19,621 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:26:19,621 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:26:19,621 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:26:19,622 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:26:19,622 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:26:19,622 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:26:19,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:26:19,623 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:26:19,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:26:19,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:26:19,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:26:19,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:26:19,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:26:19,624 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:26:19,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:26:19,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:26:19,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:26:19,625 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:26:19,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:26:19,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:26:19,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:26:19,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:26:19,626 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:26:19,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:26:19,626 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:26:19,626 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:26:19,656 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:26:19,674 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:26:19,679 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:26:19,681 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:26:19,681 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:26:19,682 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/lcm1.c [2019-09-20 13:26:19,756 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad7dd13be/22e26ecf35b54dcba0ba3f2a15be7900/FLAG586028ea3 [2019-09-20 13:26:20,203 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:26:20,204 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/lcm1.c [2019-09-20 13:26:20,210 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad7dd13be/22e26ecf35b54dcba0ba3f2a15be7900/FLAG586028ea3 [2019-09-20 13:26:20,590 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad7dd13be/22e26ecf35b54dcba0ba3f2a15be7900 [2019-09-20 13:26:20,601 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:26:20,603 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:26:20,603 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:26:20,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:26:20,607 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:26:20,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:26:20" (1/1) ... [2019-09-20 13:26:20,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b559968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:20, skipping insertion in model container [2019-09-20 13:26:20,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:26:20" (1/1) ... [2019-09-20 13:26:20,618 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:26:20,639 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:26:20,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:26:20,854 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:26:20,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:26:20,885 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:26:20,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:20 WrapperNode [2019-09-20 13:26:20,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:26:20,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:26:20,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:26:20,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:26:20,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:20" (1/1) ... [2019-09-20 13:26:20,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:20" (1/1) ... [2019-09-20 13:26:21,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:20" (1/1) ... [2019-09-20 13:26:21,001 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:20" (1/1) ... [2019-09-20 13:26:21,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:20" (1/1) ... [2019-09-20 13:26:21,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:20" (1/1) ... [2019-09-20 13:26:21,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:20" (1/1) ... [2019-09-20 13:26:21,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:26:21,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:26:21,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:26:21,013 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:26:21,014 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:26:21,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:26:21,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:26:21,068 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 13:26:21,068 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:26:21,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:26:21,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:26:21,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-20 13:26:21,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 13:26:21,069 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:26:21,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:26:21,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:26:21,249 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:26:21,249 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-20 13:26:21,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:26:21 BoogieIcfgContainer [2019-09-20 13:26:21,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:26:21,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:26:21,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:26:21,258 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:26:21,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:26:20" (1/3) ... [2019-09-20 13:26:21,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d440292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:26:21, skipping insertion in model container [2019-09-20 13:26:21,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:20" (2/3) ... [2019-09-20 13:26:21,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d440292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:26:21, skipping insertion in model container [2019-09-20 13:26:21,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:26:21" (3/3) ... [2019-09-20 13:26:21,262 INFO L109 eAbstractionObserver]: Analyzing ICFG lcm1.c [2019-09-20 13:26:21,293 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:26:21,302 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:26:21,347 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:26:21,378 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:26:21,378 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:26:21,378 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:26:21,378 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:26:21,378 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:26:21,379 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:26:21,379 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:26:21,379 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:26:21,392 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-09-20 13:26:21,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-20 13:26:21,401 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:21,402 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:21,404 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:21,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:21,408 INFO L82 PathProgramCache]: Analyzing trace with hash -831554694, now seen corresponding path program 1 times [2019-09-20 13:26:21,410 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:21,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:21,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:21,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:21,451 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:21,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:21,520 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:21,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 13:26:21,521 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:21,524 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:26:21,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:26:21,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:26:21,537 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2019-09-20 13:26:21,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:21,556 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2019-09-20 13:26:21,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:26:21,558 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-20 13:26:21,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:21,566 INFO L225 Difference]: With dead ends: 27 [2019-09-20 13:26:21,566 INFO L226 Difference]: Without dead ends: 22 [2019-09-20 13:26:21,568 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:26:21,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-20 13:26:21,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-09-20 13:26:21,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-20 13:26:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2019-09-20 13:26:21,604 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 10 [2019-09-20 13:26:21,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:21,604 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2019-09-20 13:26:21,604 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:26:21,605 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2019-09-20 13:26:21,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-20 13:26:21,605 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:21,605 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:21,606 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:21,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:21,606 INFO L82 PathProgramCache]: Analyzing trace with hash -871444843, now seen corresponding path program 1 times [2019-09-20 13:26:21,607 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:21,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:21,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:21,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:21,609 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:21,618 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 13:26:21,618 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 13:26:21,619 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG 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 [2019-09-20 13:26:21,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:21,644 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-20 13:26:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:21,656 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-09-20 13:26:21,657 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-20 13:26:21,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:21,657 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:26:21,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:21,671 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-20 13:26:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:21,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-20 13:26:21,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:26:21,757 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:26:21,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:21,788 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:26:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:21,859 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:21,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-09-20 13:26:21,860 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:21,861 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:26:21,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:26:21,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-20 13:26:21,862 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 5 states. [2019-09-20 13:26:21,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:21,970 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2019-09-20 13:26:21,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 13:26:21,971 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-20 13:26:21,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:21,972 INFO L225 Difference]: With dead ends: 37 [2019-09-20 13:26:21,972 INFO L226 Difference]: Without dead ends: 37 [2019-09-20 13:26:21,973 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-09-20 13:26:21,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-20 13:26:21,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2019-09-20 13:26:21,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-20 13:26:21,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2019-09-20 13:26:21,984 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 10 [2019-09-20 13:26:21,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:21,985 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2019-09-20 13:26:21,985 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:26:21,985 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2019-09-20 13:26:21,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-20 13:26:21,986 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:21,986 INFO L407 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:21,987 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:21,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:21,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1387131099, now seen corresponding path program 1 times [2019-09-20 13:26:21,987 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:21,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:21,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:21,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:21,989 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:21,996 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 13:26:21,996 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 13:26:21,997 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG 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 [2019-09-20 13:26:22,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:22,016 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-20 13:26:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:22,028 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2019-09-20 13:26:22,030 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [17], [62], [65], [67], [70], [72], [73], [74], [75], [77], [78], [83] [2019-09-20 13:26:22,069 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:26:22,070 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:26:22,191 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-20 13:26:22,193 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 30 root evaluator evaluations with a maximum evaluation depth of 7. Performed 30 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 8 variables. [2019-09-20 13:26:22,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:22,197 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-20 13:26:22,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:22,197 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:26:22,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:22,242 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-20 13:26:22,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:22,268 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-20 13:26:22,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:26:22,320 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:26:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:22,344 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:26:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:22,449 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:22,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2019-09-20 13:26:22,450 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:22,450 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:26:22,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:26:22,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-09-20 13:26:22,451 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand 6 states. [2019-09-20 13:26:22,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:22,631 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2019-09-20 13:26:22,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:26:22,632 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-09-20 13:26:22,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:22,634 INFO L225 Difference]: With dead ends: 54 [2019-09-20 13:26:22,634 INFO L226 Difference]: Without dead ends: 48 [2019-09-20 13:26:22,635 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-09-20 13:26:22,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-20 13:26:22,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-09-20 13:26:22,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-20 13:26:22,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2019-09-20 13:26:22,645 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 16 [2019-09-20 13:26:22,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:22,645 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2019-09-20 13:26:22,645 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:26:22,645 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2019-09-20 13:26:22,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-20 13:26:22,646 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:22,647 INFO L407 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:22,647 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:22,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:22,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1615934296, now seen corresponding path program 1 times [2019-09-20 13:26:22,647 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:22,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:22,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:22,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:22,649 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:22,661 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 13:26:22,662 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 13:26:22,662 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 13:26:22,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:22,680 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-20 13:26:22,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:22,693 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2019-09-20 13:26:22,693 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [19], [28], [34], [62], [65], [67], [70], [72], [73], [74], [75], [77], [78], [79], [80] [2019-09-20 13:26:22,695 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:26:22,696 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:26:22,725 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-20 13:26:22,725 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 30 root evaluator evaluations with a maximum evaluation depth of 7. Performed 30 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 8 variables. [2019-09-20 13:26:22,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:22,726 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-20 13:26:22,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:22,726 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:26:22,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:22,751 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-20 13:26:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:22,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-20 13:26:22,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:26:22,821 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:26:22,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-20 13:26:22,850 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:26:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-20 13:26:22,912 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:26:22,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2019-09-20 13:26:22,913 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:22,913 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:26:22,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:26:22,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-09-20 13:26:22,914 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand 5 states. [2019-09-20 13:26:22,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:22,980 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2019-09-20 13:26:22,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:26:22,980 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-09-20 13:26:22,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:22,982 INFO L225 Difference]: With dead ends: 52 [2019-09-20 13:26:22,982 INFO L226 Difference]: Without dead ends: 52 [2019-09-20 13:26:22,982 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-09-20 13:26:22,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-20 13:26:22,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2019-09-20 13:26:22,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-20 13:26:22,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2019-09-20 13:26:22,989 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 24 [2019-09-20 13:26:22,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:22,990 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2019-09-20 13:26:22,990 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:26:22,990 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2019-09-20 13:26:22,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-20 13:26:22,992 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:22,992 INFO L407 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:22,992 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:22,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:22,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1467183567, now seen corresponding path program 1 times [2019-09-20 13:26:22,993 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:22,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:22,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:22,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:22,995 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:23,001 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 13:26:23,001 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 13:26:23,001 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-20 13:26:23,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:23,027 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 13:26:23,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:23,049 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 45 with the following transitions: [2019-09-20 13:26:23,050 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [17], [19], [28], [32], [45], [49], [51], [62], [65], [67], [70], [72], [73], [74], [75], [77], [78], [79], [80], [81], [82], [83] [2019-09-20 13:26:23,056 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:26:23,057 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:26:23,079 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-20 13:26:23,079 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 30 root evaluator evaluations with a maximum evaluation depth of 7. Performed 30 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 8 variables. [2019-09-20 13:26:23,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:23,080 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-20 13:26:23,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:23,080 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:26:23,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:23,108 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-20 13:26:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:23,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-20 13:26:23,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:26:23,222 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:26:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-20 13:26:23,254 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:26:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-20 13:26:23,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:26:23,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-09-20 13:26:23,458 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-20 13:26:23,458 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-20 13:26:23,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-20 13:26:23,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-09-20 13:26:23,459 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 14 states. [2019-09-20 13:26:25,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:25,504 INFO L93 Difference]: Finished difference Result 134 states and 192 transitions. [2019-09-20 13:26:25,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-20 13:26:25,505 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2019-09-20 13:26:25,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:25,508 INFO L225 Difference]: With dead ends: 134 [2019-09-20 13:26:25,509 INFO L226 Difference]: Without dead ends: 126 [2019-09-20 13:26:25,509 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2019-09-20 13:26:25,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-09-20 13:26:25,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2019-09-20 13:26:25,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-09-20 13:26:25,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 135 transitions. [2019-09-20 13:26:25,524 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 135 transitions. Word has length 44 [2019-09-20 13:26:25,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:25,525 INFO L475 AbstractCegarLoop]: Abstraction has 99 states and 135 transitions. [2019-09-20 13:26:25,525 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-20 13:26:25,525 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 135 transitions. [2019-09-20 13:26:25,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-20 13:26:25,527 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:25,527 INFO L407 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:25,528 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:25,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:25,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1303301358, now seen corresponding path program 1 times [2019-09-20 13:26:25,528 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:25,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:25,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:25,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:25,530 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:25,536 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 13:26:25,536 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 13:26:25,536 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 13:26:25,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:25,552 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-20 13:26:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:25,575 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 50 with the following transitions: [2019-09-20 13:26:25,576 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [17], [19], [28], [32], [34], [45], [49], [62], [65], [67], [70], [72], [73], [74], [75], [77], [78], [79], [80], [81], [82], [83], [84], [85] [2019-09-20 13:26:25,583 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:26:25,584 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:26:25,611 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-20 13:26:25,611 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 30 root evaluator evaluations with a maximum evaluation depth of 7. Performed 30 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 8 variables. [2019-09-20 13:26:25,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:25,612 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-20 13:26:25,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:25,612 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:26:25,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:25,640 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-20 13:26:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:25,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-20 13:26:25,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:26:25,684 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:26:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-09-20 13:26:25,697 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:26:25,739 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-09-20 13:26:25,743 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:25,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2019-09-20 13:26:25,743 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:25,743 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:26:25,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:26:25,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-20 13:26:25,744 INFO L87 Difference]: Start difference. First operand 99 states and 135 transitions. Second operand 6 states. [2019-09-20 13:26:25,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:25,793 INFO L93 Difference]: Finished difference Result 100 states and 132 transitions. [2019-09-20 13:26:25,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:26:25,793 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2019-09-20 13:26:25,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:25,794 INFO L225 Difference]: With dead ends: 100 [2019-09-20 13:26:25,794 INFO L226 Difference]: Without dead ends: 79 [2019-09-20 13:26:25,795 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-09-20 13:26:25,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-20 13:26:25,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-09-20 13:26:25,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-20 13:26:25,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 104 transitions. [2019-09-20 13:26:25,804 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 104 transitions. Word has length 49 [2019-09-20 13:26:25,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:25,805 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 104 transitions. [2019-09-20 13:26:25,805 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:26:25,805 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 104 transitions. [2019-09-20 13:26:25,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-20 13:26:25,807 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:25,807 INFO L407 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:25,808 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:25,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:25,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1401665144, now seen corresponding path program 1 times [2019-09-20 13:26:25,808 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:25,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:25,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:25,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:25,810 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:25,815 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-20 13:26:25,815 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-20 13:26:25,815 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-20 13:26:25,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:25,844 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-20 13:26:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:25,860 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 52 with the following transitions: [2019-09-20 13:26:25,860 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [17], [19], [28], [32], [34], [45], [49], [62], [65], [67], [70], [72], [73], [74], [75], [77], [78], [79], [80], [81], [82], [83] [2019-09-20 13:26:25,862 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:26:25,862 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:26:25,877 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-20 13:26:25,877 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 30 root evaluator evaluations with a maximum evaluation depth of 7. Performed 30 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 8 variables. [2019-09-20 13:26:25,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:25,878 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-20 13:26:25,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:25,878 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:26:25,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:25,905 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-20 13:26:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:25,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-20 13:26:25,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:26:26,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:26:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-09-20 13:26:26,079 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:26:26,184 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:26:26,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:26:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-09-20 13:26:26,237 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:26:26,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2019-09-20 13:26:26,238 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-20 13:26:26,238 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-20 13:26:26,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-20 13:26:26,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2019-09-20 13:26:26,239 INFO L87 Difference]: Start difference. First operand 79 states and 104 transitions. Second operand 15 states. [2019-09-20 13:26:26,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:26,445 INFO L93 Difference]: Finished difference Result 77 states and 102 transitions. [2019-09-20 13:26:26,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 13:26:26,445 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2019-09-20 13:26:26,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:26,446 INFO L225 Difference]: With dead ends: 77 [2019-09-20 13:26:26,446 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:26:26,446 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2019-09-20 13:26:26,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:26:26,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:26:26,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:26:26,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:26:26,447 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2019-09-20 13:26:26,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:26,447 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:26:26,447 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-20 13:26:26,448 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:26:26,448 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:26:26,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:26:26 BoogieIcfgContainer [2019-09-20 13:26:26,453 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:26:26,455 INFO L168 Benchmark]: Toolchain (without parser) took 5851.52 ms. Allocated memory was 138.9 MB in the beginning and 262.7 MB in the end (delta: 123.7 MB). Free memory was 86.8 MB in the beginning and 179.6 MB in the end (delta: -92.8 MB). Peak memory consumption was 30.9 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:26,456 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 138.9 MB. Free memory was 105.0 MB in the beginning and 104.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:26:26,456 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.70 ms. Allocated memory is still 138.9 MB. Free memory was 86.6 MB in the beginning and 76.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:26,457 INFO L168 Benchmark]: Boogie Preprocessor took 126.32 ms. Allocated memory was 138.9 MB in the beginning and 199.2 MB in the end (delta: 60.3 MB). Free memory was 76.8 MB in the beginning and 176.7 MB in the end (delta: -99.8 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:26,458 INFO L168 Benchmark]: RCFGBuilder took 237.79 ms. Allocated memory is still 199.2 MB. Free memory was 176.7 MB in the beginning and 163.8 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:26,459 INFO L168 Benchmark]: TraceAbstraction took 5200.88 ms. Allocated memory was 199.2 MB in the beginning and 262.7 MB in the end (delta: 63.4 MB). Free memory was 163.2 MB in the beginning and 179.6 MB in the end (delta: -16.4 MB). Peak memory consumption was 47.1 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:26,463 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 138.9 MB. Free memory was 105.0 MB in the beginning and 104.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 282.70 ms. Allocated memory is still 138.9 MB. Free memory was 86.6 MB in the beginning and 76.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.32 ms. Allocated memory was 138.9 MB in the beginning and 199.2 MB in the end (delta: 60.3 MB). Free memory was 76.8 MB in the beginning and 176.7 MB in the end (delta: -99.8 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 237.79 ms. Allocated memory is still 199.2 MB. Free memory was 176.7 MB in the beginning and 163.8 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5200.88 ms. Allocated memory was 199.2 MB in the beginning and 262.7 MB in the end (delta: 63.4 MB). Free memory was 163.2 MB in the beginning and 179.6 MB in the end (delta: -16.4 MB). Peak memory consumption was 47.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. SAFE Result, 5.0s OverallTime, 7 OverallIterations, 7 TraceHistogramMax, 2.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 192 SDtfs, 139 SDslu, 695 SDs, 0 SdLazy, 695 SolverSat, 108 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 399 GetRequests, 329 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 5 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 42 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 398 NumberOfCodeBlocks, 398 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 385 ConstructedInterpolants, 6 QuantifiedInterpolants, 70612 SizeOfPredicates, 25 NumberOfNonLiveVariables, 466 ConjunctsInSsa, 94 ConjunctsInUnsatCore, 13 InterpolantComputations, 8 PerfectInterpolantSequences, 432/460 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...