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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/array-multidimensional/init-non-constant-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:53:41,564 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:53:41,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:53:41,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:53:41,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:53:41,589 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:53:41,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:53:41,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:53:41,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:53:41,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:53:41,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:53:41,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:53:41,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:53:41,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:53:41,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:53:41,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:53:41,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:53:41,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:53:41,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:53:41,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:53:41,630 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:53:41,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:53:41,635 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:53:41,636 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:53:41,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 19:53:41,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:53:41,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:53:41,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:53:41,650 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 [2019-10-13 19:53:41,677 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:53:41,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:53:41,679 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:53:41,679 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:53:41,679 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:53:41,680 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:53:41,680 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:53:41,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:53:41,680 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:53:41,680 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:53:41,681 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:53:41,681 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:53:41,681 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:53:41,681 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:53:41,682 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:53:41,682 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:53:41,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:53:41,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:53:41,682 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:53:41,683 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:53:41,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:53:41,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:53:41,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:53:41,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:53:41,684 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:53:41,684 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:53:41,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:53:41,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:53:41,684 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 19:53:41,981 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:53:42,006 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:53:42,011 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:53:42,013 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:53:42,013 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:53:42,014 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/init-non-constant-3-u.c [2019-10-13 19:53:42,096 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45de7f7db/9a84f929bf0c4db684a29037aeffd0a2/FLAGb78e7b4c0 [2019-10-13 19:53:42,581 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:53:42,582 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/init-non-constant-3-u.c [2019-10-13 19:53:42,588 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45de7f7db/9a84f929bf0c4db684a29037aeffd0a2/FLAGb78e7b4c0 [2019-10-13 19:53:42,950 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45de7f7db/9a84f929bf0c4db684a29037aeffd0a2 [2019-10-13 19:53:42,961 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:53:42,963 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:53:42,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:53:42,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:53:42,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:53:42,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:53:42" (1/1) ... [2019-10-13 19:53:42,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fb457ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:42, skipping insertion in model container [2019-10-13 19:53:42,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:53:42" (1/1) ... [2019-10-13 19:53:42,981 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:53:43,002 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:53:43,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:53:43,206 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:53:43,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:53:43,248 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:53:43,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:43 WrapperNode [2019-10-13 19:53:43,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:53:43,250 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:53:43,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:53:43,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:53:43,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:43" (1/1) ... [2019-10-13 19:53:43,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:43" (1/1) ... [2019-10-13 19:53:43,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:43" (1/1) ... [2019-10-13 19:53:43,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:43" (1/1) ... [2019-10-13 19:53:43,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:43" (1/1) ... [2019-10-13 19:53:43,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:43" (1/1) ... [2019-10-13 19:53:43,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:43" (1/1) ... [2019-10-13 19:53:43,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:53:43,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:53:43,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:53:43,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:53:43,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:43" (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 [2019-10-13 19:53:43,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:53:43,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:53:43,436 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 19:53:43,436 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:53:43,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:53:43,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:53:43,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-13 19:53:43,437 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:53:43,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 19:53:43,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 19:53:43,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 19:53:43,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 19:53:43,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:53:43,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:53:43,718 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:53:43,718 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-13 19:53:43,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:53:43 BoogieIcfgContainer [2019-10-13 19:53:43,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:53:43,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:53:43,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:53:43,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:53:43,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:53:42" (1/3) ... [2019-10-13 19:53:43,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49588989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:53:43, skipping insertion in model container [2019-10-13 19:53:43,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:43" (2/3) ... [2019-10-13 19:53:43,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49588989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:53:43, skipping insertion in model container [2019-10-13 19:53:43,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:53:43" (3/3) ... [2019-10-13 19:53:43,743 INFO L109 eAbstractionObserver]: Analyzing ICFG init-non-constant-3-u.c [2019-10-13 19:53:43,755 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:53:43,763 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:53:43,774 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:53:43,798 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:53:43,798 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:53:43,799 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:53:43,799 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:53:43,799 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:53:43,799 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:53:43,799 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:53:43,799 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:53:43,817 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-10-13 19:53:43,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 19:53:43,822 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:53:43,823 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:53:43,825 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:53:43,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:53:43,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1375180307, now seen corresponding path program 1 times [2019-10-13 19:53:43,840 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 19:53:43,840 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528483881] [2019-10-13 19:53:43,841 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:43,841 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:43,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:53:43,923 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:53:43,924 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201740998] [2019-10-13 19:53:43,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:53:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:53:44,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 19:53:44,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:53:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:53:44,029 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 19:53:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:53:44,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528483881] [2019-10-13 19:53:44,050 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:53:44,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201740998] [2019-10-13 19:53:44,051 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:53:44,051 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-10-13 19:53:44,051 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331914969] [2019-10-13 19:53:44,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 19:53:44,057 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 19:53:44,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 19:53:44,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 19:53:44,074 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2019-10-13 19:53:44,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:53:44,102 INFO L93 Difference]: Finished difference Result 54 states and 79 transitions. [2019-10-13 19:53:44,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 19:53:44,104 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-10-13 19:53:44,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:53:44,113 INFO L225 Difference]: With dead ends: 54 [2019-10-13 19:53:44,113 INFO L226 Difference]: Without dead ends: 25 [2019-10-13 19:53:44,116 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 19:53:44,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-13 19:53:44,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-13 19:53:44,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-13 19:53:44,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2019-10-13 19:53:44,150 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 15 [2019-10-13 19:53:44,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:53:44,151 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2019-10-13 19:53:44,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 19:53:44,151 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2019-10-13 19:53:44,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 19:53:44,152 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:53:44,152 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:53:44,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:53:44,356 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:53:44,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:53:44,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1308846031, now seen corresponding path program 1 times [2019-10-13 19:53:44,357 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 19:53:44,358 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300961625] [2019-10-13 19:53:44,358 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:44,359 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:44,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:53:44,378 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:53:44,379 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242555955] [2019-10-13 19:53:44,379 INFO L94 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 [2019-10-13 19:53:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:53:44,437 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 19:53:44,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:53:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:53:44,478 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 19:53:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:53:44,508 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300961625] [2019-10-13 19:53:44,508 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:53:44,509 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242555955] [2019-10-13 19:53:44,509 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:53:44,510 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-13 19:53:44,510 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336719386] [2019-10-13 19:53:44,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:53:44,513 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 19:53:44,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:53:44,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:53:44,515 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 4 states. [2019-10-13 19:53:44,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:53:44,598 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2019-10-13 19:53:44,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:53:44,599 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-13 19:53:44,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:53:44,601 INFO L225 Difference]: With dead ends: 45 [2019-10-13 19:53:44,601 INFO L226 Difference]: Without dead ends: 31 [2019-10-13 19:53:44,602 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:53:44,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-13 19:53:44,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-13 19:53:44,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-13 19:53:44,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2019-10-13 19:53:44,611 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 15 [2019-10-13 19:53:44,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:53:44,611 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2019-10-13 19:53:44,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:53:44,611 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2019-10-13 19:53:44,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-13 19:53:44,612 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:53:44,613 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:53:44,824 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:53:44,825 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:53:44,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:53:44,826 INFO L82 PathProgramCache]: Analyzing trace with hash -932040465, now seen corresponding path program 1 times [2019-10-13 19:53:44,826 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 19:53:44,827 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620921895] [2019-10-13 19:53:44,827 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:44,828 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:44,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:53:44,847 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:53:44,848 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019677634] [2019-10-13 19:53:44,848 INFO L94 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 [2019-10-13 19:53:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:53:44,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 19:53:44,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:53:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 19:53:44,940 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 19:53:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 19:53:44,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620921895] [2019-10-13 19:53:44,975 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:53:44,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019677634] [2019-10-13 19:53:44,976 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:53:44,976 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-13 19:53:44,976 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587738839] [2019-10-13 19:53:44,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:53:44,977 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 19:53:44,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:53:44,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:53:44,978 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 6 states. [2019-10-13 19:53:45,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:53:45,137 INFO L93 Difference]: Finished difference Result 67 states and 89 transitions. [2019-10-13 19:53:45,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:53:45,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-10-13 19:53:45,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:53:45,142 INFO L225 Difference]: With dead ends: 67 [2019-10-13 19:53:45,143 INFO L226 Difference]: Without dead ends: 46 [2019-10-13 19:53:45,144 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:53:45,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-13 19:53:45,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2019-10-13 19:53:45,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-13 19:53:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2019-10-13 19:53:45,175 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 21 [2019-10-13 19:53:45,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:53:45,177 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2019-10-13 19:53:45,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:53:45,177 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2019-10-13 19:53:45,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-13 19:53:45,179 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:53:45,179 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:53:45,384 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:53:45,384 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:53:45,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:53:45,384 INFO L82 PathProgramCache]: Analyzing trace with hash 540435247, now seen corresponding path program 1 times [2019-10-13 19:53:45,385 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 19:53:45,385 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038808867] [2019-10-13 19:53:45,386 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:45,386 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:45,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:53:45,395 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:53:45,395 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [367323542] [2019-10-13 19:53:45,396 INFO L94 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 [2019-10-13 19:53:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:53:45,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 19:53:45,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:53:45,479 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 19:53:45,480 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 19:53:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 19:53:45,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038808867] [2019-10-13 19:53:45,502 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:53:45,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367323542] [2019-10-13 19:53:45,503 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:53:45,503 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-13 19:53:45,503 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614573939] [2019-10-13 19:53:45,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:53:45,504 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 19:53:45,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:53:45,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:53:45,505 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand 6 states. [2019-10-13 19:53:45,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:53:45,643 INFO L93 Difference]: Finished difference Result 98 states and 133 transitions. [2019-10-13 19:53:45,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:53:45,644 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2019-10-13 19:53:45,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:53:45,647 INFO L225 Difference]: With dead ends: 98 [2019-10-13 19:53:45,647 INFO L226 Difference]: Without dead ends: 62 [2019-10-13 19:53:45,648 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:53:45,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-13 19:53:45,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-10-13 19:53:45,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-13 19:53:45,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2019-10-13 19:53:45,676 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 33 [2019-10-13 19:53:45,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:53:45,677 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2019-10-13 19:53:45,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:53:45,682 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2019-10-13 19:53:45,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-13 19:53:45,683 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:53:45,684 INFO L380 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:53:45,884 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:53:45,885 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:53:45,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:53:45,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1893170001, now seen corresponding path program 1 times [2019-10-13 19:53:45,885 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 19:53:45,885 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072608936] [2019-10-13 19:53:45,885 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:45,886 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:45,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:53:45,895 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:53:45,897 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918692897] [2019-10-13 19:53:45,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 19:53:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:53:45,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 19:53:45,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:53:45,996 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-13 19:53:45,996 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 19:53:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-13 19:53:46,052 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072608936] [2019-10-13 19:53:46,052 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:53:46,052 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918692897] [2019-10-13 19:53:46,052 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [797030072] [2019-10-13 19:53:46,068 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 42 [2019-10-13 19:53:46,109 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 19:53:46,109 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 19:53:46,164 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 19:53:46,166 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 16 root evaluator evaluations with a maximum evaluation depth of 0. Performed 16 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 21 variables. [2019-10-13 19:53:46,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:53:46,170 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-13 19:53:46,208 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-10-13 19:53:46,209 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-13 19:53:46,211 INFO L553 sIntCurrentIteration]: We unified 40 AI predicates to 40 [2019-10-13 19:53:46,211 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-13 19:53:46,212 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:53:46,212 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6, 6] total 10 [2019-10-13 19:53:46,212 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231867152] [2019-10-13 19:53:46,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 19:53:46,213 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-13 19:53:46,213 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-13 19:53:46,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 19:53:46,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 19:53:46,214 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 2 states. [2019-10-13 19:53:46,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:53:46,218 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2019-10-13 19:53:46,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 19:53:46,218 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 41 [2019-10-13 19:53:46,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:53:46,219 INFO L225 Difference]: With dead ends: 61 [2019-10-13 19:53:46,219 INFO L226 Difference]: Without dead ends: 0 [2019-10-13 19:53:46,220 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 19:53:46,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-13 19:53:46,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-13 19:53:46,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-13 19:53:46,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-13 19:53:46,221 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2019-10-13 19:53:46,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:53:46,221 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-13 19:53:46,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 19:53:46,221 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-13 19:53:46,221 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-13 19:53:46,425 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:53:46,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-13 19:53:46,455 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-10-13 19:53:46,455 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-10-13 19:53:46,455 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-13 19:53:46,455 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-13 19:53:46,456 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-13 19:53:46,456 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-13 19:53:46,456 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-13 19:53:46,456 INFO L439 ceAbstractionStarter]: At program point L27-2(lines 27 30) the Hoare annotation is: false [2019-10-13 19:53:46,456 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 11 56) no Hoare annotation was computed. [2019-10-13 19:53:46,456 INFO L443 ceAbstractionStarter]: For program point L27-3(lines 27 30) no Hoare annotation was computed. [2019-10-13 19:53:46,456 INFO L439 ceAbstractionStarter]: At program point L48(line 48) the Hoare annotation is: false [2019-10-13 19:53:46,457 INFO L443 ceAbstractionStarter]: For program point L48-1(line 48) no Hoare annotation was computed. [2019-10-13 19:53:46,457 INFO L439 ceAbstractionStarter]: At program point L45-2(lines 45 52) the Hoare annotation is: false [2019-10-13 19:53:46,457 INFO L443 ceAbstractionStarter]: For program point L45-3(lines 45 52) no Hoare annotation was computed. [2019-10-13 19:53:46,457 INFO L439 ceAbstractionStarter]: At program point L25-2(lines 25 32) the Hoare annotation is: false [2019-10-13 19:53:46,457 INFO L443 ceAbstractionStarter]: For program point L25-3(lines 25 32) no Hoare annotation was computed. [2019-10-13 19:53:46,457 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 11 56) no Hoare annotation was computed. [2019-10-13 19:53:46,457 INFO L439 ceAbstractionStarter]: At program point L42-2(lines 42 54) the Hoare annotation is: false [2019-10-13 19:53:46,457 INFO L443 ceAbstractionStarter]: For program point L42-3(lines 42 54) no Hoare annotation was computed. [2019-10-13 19:53:46,458 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 11 56) the Hoare annotation is: true [2019-10-13 19:53:46,458 INFO L439 ceAbstractionStarter]: At program point L22-2(lines 22 34) the Hoare annotation is: false [2019-10-13 19:53:46,458 INFO L443 ceAbstractionStarter]: For program point L22-3(lines 22 34) no Hoare annotation was computed. [2019-10-13 19:53:46,458 INFO L439 ceAbstractionStarter]: At program point L47-2(lines 47 50) the Hoare annotation is: false [2019-10-13 19:53:46,458 INFO L443 ceAbstractionStarter]: For program point L47-3(lines 47 50) no Hoare annotation was computed. [2019-10-13 19:53:46,458 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-10-13 19:53:46,458 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-10-13 19:53:46,459 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-13 19:53:46,459 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-13 19:53:46,459 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-13 19:53:46,459 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-10-13 19:53:46,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:53:46 BoogieIcfgContainer [2019-10-13 19:53:46,468 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-13 19:53:46,470 INFO L168 Benchmark]: Toolchain (without parser) took 3507.16 ms. Allocated memory was 141.0 MB in the beginning and 234.4 MB in the end (delta: 93.3 MB). Free memory was 102.1 MB in the beginning and 138.3 MB in the end (delta: -36.1 MB). Peak memory consumption was 57.2 MB. Max. memory is 7.1 GB. [2019-10-13 19:53:46,471 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 141.0 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2019-10-13 19:53:46,472 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.02 ms. Allocated memory is still 141.0 MB. Free memory was 101.7 MB in the beginning and 91.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2019-10-13 19:53:46,473 INFO L168 Benchmark]: Boogie Preprocessor took 124.40 ms. Allocated memory was 141.0 MB in the beginning and 201.9 MB in the end (delta: 60.8 MB). Free memory was 91.5 MB in the beginning and 179.5 MB in the end (delta: -88.0 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2019-10-13 19:53:46,474 INFO L168 Benchmark]: RCFGBuilder took 345.73 ms. Allocated memory is still 201.9 MB. Free memory was 179.5 MB in the beginning and 164.5 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2019-10-13 19:53:46,475 INFO L168 Benchmark]: TraceAbstraction took 2739.55 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 163.8 MB in the beginning and 138.3 MB in the end (delta: 25.6 MB). Peak memory consumption was 58.1 MB. Max. memory is 7.1 GB. [2019-10-13 19:53:46,479 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 141.0 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 286.02 ms. Allocated memory is still 141.0 MB. Free memory was 101.7 MB in the beginning and 91.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.40 ms. Allocated memory was 141.0 MB in the beginning and 201.9 MB in the end (delta: 60.8 MB). Free memory was 91.5 MB in the beginning and 179.5 MB in the end (delta: -88.0 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 345.73 ms. Allocated memory is still 201.9 MB. Free memory was 179.5 MB in the beginning and 164.5 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2739.55 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 163.8 MB in the beginning and 138.3 MB in the end (delta: 25.6 MB). Peak memory consumption was 58.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 30 locations, 1 error locations. Result: SAFE, OverallTime: 2.6s, OverallIterations: 5, TraceHistogramMax: 8, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 96 SDtfs, 114 SDslu, 82 SDs, 0 SdLazy, 85 SolverSat, 56 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 206 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 20 PreInvPairs, 20 NumberOfFragments, 12 HoareAnnotationTreeSize, 20 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 125 NumberOfCodeBlocks, 125 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 240 ConstructedInterpolants, 0 QuantifiedInterpolants, 9136 SizeOfPredicates, 8 NumberOfNonLiveVariables, 488 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 10 InterpolantComputations, 8 PerfectInterpolantSequences, 248/254 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: TIME[ms]: 103, ITERATIONS: 1, WAS_STRONG: 1, WEAKENING_RATIO: 0.95625, AVG_VARS_REMOVED_DURING_WEAKENING: 0.65, AVG_WEAKENED_CONJUNCTS: 0.15, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...