java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/prodbin.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 12:28:56,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 12:28:56,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 12:28:56,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-05 12:28:56,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-05 12:28:56,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-05 12:28:56,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-05 12:28:56,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-05 12:28:56,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-05 12:28:56,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-05 12:28:56,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-05 12:28:56,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-05 12:28:56,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-05 12:28:56,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-05 12:28:56,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-05 12:28:56,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-05 12:28:56,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-05 12:28:56,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-05 12:28:56,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-05 12:28:56,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-05 12:28:56,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-05 12:28:56,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-05 12:28:56,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-05 12:28:56,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-05 12:28:56,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-05 12:28:56,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 12:28:56,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 12:28:56,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 12:28:56,944 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 [2019-09-05 12:28:56,958 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 12:28:56,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 12:28:56,959 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-05 12:28:56,959 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-05 12:28:56,960 INFO L138 SettingsManager]: * Use SBE=true [2019-09-05 12:28:56,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 12:28:56,960 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 12:28:56,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-05 12:28:56,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 12:28:56,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 12:28:56,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 12:28:56,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 12:28:56,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 12:28:56,961 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 12:28:56,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 12:28:56,962 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-05 12:28:56,962 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 12:28:56,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 12:28:56,962 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 12:28:56,962 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-05 12:28:56,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-05 12:28:56,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 12:28:56,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 12:28:56,963 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 12:28:56,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-05 12:28:56,964 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-05 12:28:56,964 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 12:28:56,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 12:28:56,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-05 12:28:56,993 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 12:28:57,004 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 12:28:57,007 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 12:28:57,009 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 12:28:57,009 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 12:28:57,010 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/prodbin.c [2019-09-05 12:28:57,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81f4858f0/3fd7d7d4a0444da28c35c3fccfa73d67/FLAGc546ef013 [2019-09-05 12:28:57,483 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 12:28:57,485 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/prodbin.c [2019-09-05 12:28:57,491 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81f4858f0/3fd7d7d4a0444da28c35c3fccfa73d67/FLAGc546ef013 [2019-09-05 12:28:57,883 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81f4858f0/3fd7d7d4a0444da28c35c3fccfa73d67 [2019-09-05 12:28:57,892 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 12:28:57,894 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 12:28:57,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 12:28:57,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 12:28:57,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 12:28:57,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:28:57" (1/1) ... [2019-09-05 12:28:57,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@428dcc35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:28:57, skipping insertion in model container [2019-09-05 12:28:57,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:28:57" (1/1) ... [2019-09-05 12:28:57,910 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 12:28:57,928 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 12:28:58,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:28:58,109 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 12:28:58,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:28:58,146 INFO L192 MainTranslator]: Completed translation [2019-09-05 12:28:58,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:28:58 WrapperNode [2019-09-05 12:28:58,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 12:28:58,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 12:28:58,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 12:28:58,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 12:28:58,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:28:58" (1/1) ... [2019-09-05 12:28:58,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:28:58" (1/1) ... [2019-09-05 12:28:58,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:28:58" (1/1) ... [2019-09-05 12:28:58,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:28:58" (1/1) ... [2019-09-05 12:28:58,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:28:58" (1/1) ... [2019-09-05 12:28:58,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:28:58" (1/1) ... [2019-09-05 12:28:58,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:28:58" (1/1) ... [2019-09-05 12:28:58,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 12:28:58,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 12:28:58,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 12:28:58,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 12:28:58,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:28:58" (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 [2019-09-05 12:28:58,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 12:28:58,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 12:28:58,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 12:28:58,347 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 12:28:58,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 12:28:58,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2019-09-05 12:28:58,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-05 12:28:58,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 12:28:58,347 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 12:28:58,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 12:28:58,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 12:28:58,526 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 12:28:58,526 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-05 12:28:58,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:28:58 BoogieIcfgContainer [2019-09-05 12:28:58,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 12:28:58,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 12:28:58,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 12:28:58,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 12:28:58,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 12:28:57" (1/3) ... [2019-09-05 12:28:58,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dc0b54d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:28:58, skipping insertion in model container [2019-09-05 12:28:58,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:28:58" (2/3) ... [2019-09-05 12:28:58,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dc0b54d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:28:58, skipping insertion in model container [2019-09-05 12:28:58,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:28:58" (3/3) ... [2019-09-05 12:28:58,535 INFO L109 eAbstractionObserver]: Analyzing ICFG prodbin.c [2019-09-05 12:28:58,547 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 12:28:58,554 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 12:28:58,570 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 12:28:58,600 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-05 12:28:58,601 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 12:28:58,601 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-05 12:28:58,601 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 12:28:58,601 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 12:28:58,601 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 12:28:58,601 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 12:28:58,602 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 12:28:58,602 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 12:28:58,617 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-09-05 12:28:58,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 12:28:58,622 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:28:58,623 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:28:58,625 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:28:58,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:28:58,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1560104174, now seen corresponding path program 1 times [2019-09-05 12:28:58,630 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:28:58,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:28:58,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:58,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:28:58,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:28:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:28:58,739 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:28:58,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-05 12:28:58,742 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 12:28:58,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 12:28:58,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:28:58,755 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2019-09-05 12:28:58,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:28:58,778 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2019-09-05 12:28:58,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 12:28:58,779 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-05 12:28:58,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:28:58,789 INFO L225 Difference]: With dead ends: 39 [2019-09-05 12:28:58,789 INFO L226 Difference]: Without dead ends: 17 [2019-09-05 12:28:58,793 INFO L628 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 [2019-09-05 12:28:58,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-09-05 12:28:58,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-09-05 12:28:58,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-05 12:28:58,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-09-05 12:28:58,834 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2019-09-05 12:28:58,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:28:58,835 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-09-05 12:28:58,835 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 12:28:58,835 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-09-05 12:28:58,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 12:28:58,836 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:28:58,836 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:28:58,836 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:28:58,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:28:58,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1561891634, now seen corresponding path program 1 times [2019-09-05 12:28:58,837 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:28:58,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:28:58,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:58,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:28:58,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:58,844 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:28:58,845 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:28:58,845 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-05 12:28:58,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:28:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:28:58,881 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-05 12:28:58,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:28:58,961 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:28:59,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:28:59,005 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:28:59,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-05 12:28:59,007 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 12:28:59,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 12:28:59,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-05 12:28:59,008 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2019-09-05 12:28:59,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:28:59,131 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-09-05 12:28:59,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-05 12:28:59,132 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-05 12:28:59,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:28:59,135 INFO L225 Difference]: With dead ends: 33 [2019-09-05 12:28:59,135 INFO L226 Difference]: Without dead ends: 26 [2019-09-05 12:28:59,136 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:28:59,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-05 12:28:59,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-09-05 12:28:59,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-05 12:28:59,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-09-05 12:28:59,147 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2019-09-05 12:28:59,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:28:59,147 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-09-05 12:28:59,147 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 12:28:59,148 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-09-05 12:28:59,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-05 12:28:59,149 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:28:59,149 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:28:59,150 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:28:59,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:28:59,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1038075816, now seen corresponding path program 1 times [2019-09-05 12:28:59,151 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:28:59,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:28:59,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:59,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:28:59,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:59,167 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:28:59,168 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:28:59,168 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-05 12:28:59,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:28:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:28:59,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-05 12:28:59,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:28:59,383 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:28:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:28:59,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:28:59,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-05 12:28:59,418 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-05 12:28:59,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-05 12:28:59,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-05 12:28:59,419 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2019-09-05 12:28:59,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:28:59,604 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2019-09-05 12:28:59,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-05 12:28:59,606 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-09-05 12:28:59,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:28:59,607 INFO L225 Difference]: With dead ends: 39 [2019-09-05 12:28:59,608 INFO L226 Difference]: Without dead ends: 37 [2019-09-05 12:28:59,608 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:28:59,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-05 12:28:59,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2019-09-05 12:28:59,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-05 12:28:59,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2019-09-05 12:28:59,626 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 19 [2019-09-05 12:28:59,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:28:59,627 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2019-09-05 12:28:59,627 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-05 12:28:59,628 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2019-09-05 12:28:59,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-05 12:28:59,629 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:28:59,629 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:28:59,629 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:28:59,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:28:59,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1481884118, now seen corresponding path program 1 times [2019-09-05 12:28:59,631 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:28:59,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:28:59,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:59,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:28:59,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:59,642 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:28:59,643 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:28:59,643 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-05 12:28:59,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:28:59,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:28:59,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-05 12:28:59,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:28:59,794 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:28:59,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:28:59,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:28:59,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-05 12:28:59,821 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-05 12:28:59,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-05 12:28:59,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-09-05 12:28:59,822 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 7 states. [2019-09-05 12:28:59,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:28:59,952 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2019-09-05 12:28:59,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-05 12:28:59,954 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-09-05 12:28:59,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:28:59,957 INFO L225 Difference]: With dead ends: 49 [2019-09-05 12:28:59,957 INFO L226 Difference]: Without dead ends: 42 [2019-09-05 12:28:59,958 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:28:59,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-05 12:28:59,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2019-09-05 12:28:59,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-05 12:28:59,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2019-09-05 12:28:59,973 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 19 [2019-09-05 12:28:59,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:28:59,974 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2019-09-05 12:28:59,974 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-05 12:28:59,974 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2019-09-05 12:28:59,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-05 12:28:59,979 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:28:59,979 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:28:59,980 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:28:59,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:28:59,980 INFO L82 PathProgramCache]: Analyzing trace with hash 776909625, now seen corresponding path program 1 times [2019-09-05 12:28:59,981 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:28:59,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:28:59,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:59,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:28:59,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:28:59,993 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:28:59,993 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:28:59,993 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-05 12:29:00,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:29:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:29:00,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-05 12:29:00,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:00,101 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-05 12:29:00,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:00,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-05 12:29:00,127 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-05 12:29:00,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-05 12:29:00,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-09-05 12:29:00,128 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 9 states. [2019-09-05 12:29:00,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:00,251 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2019-09-05 12:29:00,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-05 12:29:00,252 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2019-09-05 12:29:00,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:00,253 INFO L225 Difference]: With dead ends: 47 [2019-09-05 12:29:00,253 INFO L226 Difference]: Without dead ends: 40 [2019-09-05 12:29:00,254 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:29:00,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-05 12:29:00,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2019-09-05 12:29:00,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-05 12:29:00,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-09-05 12:29:00,261 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 25 [2019-09-05 12:29:00,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:00,261 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-09-05 12:29:00,261 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-05 12:29:00,262 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-09-05 12:29:00,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-05 12:29:00,262 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:00,263 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:00,263 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:00,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:00,263 INFO L82 PathProgramCache]: Analyzing trace with hash -775079950, now seen corresponding path program 2 times [2019-09-05 12:29:00,263 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:00,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:00,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:00,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:29:00,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:00,268 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:00,269 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:00,269 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-05 12:29:00,282 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:00,299 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:29:00,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:00,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2019-09-05 12:29:00,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:00,584 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:02,656 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-05 12:29:02,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:02,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-05 12:29:02,660 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 12:29:02,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 12:29:02,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:29:02,661 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2019-09-05 12:29:02,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:02,921 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2019-09-05 12:29:02,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-05 12:29:02,922 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-09-05 12:29:02,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:02,923 INFO L225 Difference]: With dead ends: 53 [2019-09-05 12:29:02,924 INFO L226 Difference]: Without dead ends: 51 [2019-09-05 12:29:02,925 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:29:02,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-05 12:29:02,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2019-09-05 12:29:02,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-05 12:29:02,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2019-09-05 12:29:02,942 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 28 [2019-09-05 12:29:02,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:02,944 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2019-09-05 12:29:02,944 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 12:29:02,944 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2019-09-05 12:29:02,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-05 12:29:02,946 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:02,946 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:02,946 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:02,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:02,947 INFO L82 PathProgramCache]: Analyzing trace with hash 999927412, now seen corresponding path program 1 times [2019-09-05 12:29:02,947 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:02,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:02,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:02,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:02,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:02,964 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:02,964 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:02,965 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:29:02,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:29:03,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-05 12:29:03,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:03,075 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:03,077 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:03,216 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2019-09-05 12:29:03,413 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:03,413 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:03,489 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-05 12:29:03,545 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:03,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-05 12:29:03,545 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-05 12:29:03,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-05 12:29:03,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-09-05 12:29:03,546 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 12 states. [2019-09-05 12:29:04,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:04,139 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2019-09-05 12:29:04,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-05 12:29:04,139 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2019-09-05 12:29:04,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:04,141 INFO L225 Difference]: With dead ends: 57 [2019-09-05 12:29:04,142 INFO L226 Difference]: Without dead ends: 55 [2019-09-05 12:29:04,143 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-09-05 12:29:04,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-05 12:29:04,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2019-09-05 12:29:04,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-05 12:29:04,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2019-09-05 12:29:04,163 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 28 [2019-09-05 12:29:04,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:04,164 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2019-09-05 12:29:04,164 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-05 12:29:04,164 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2019-09-05 12:29:04,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-05 12:29:04,167 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:04,167 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:04,167 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:04,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:04,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1796148304, now seen corresponding path program 2 times [2019-09-05 12:29:04,168 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:04,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:04,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:04,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:29:04,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:04,178 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:04,178 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:04,178 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-05 12:29:04,195 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:04,208 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:29:04,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:04,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-05 12:29:04,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:04,394 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:04,427 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-05 12:29:04,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:04,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-05 12:29:04,431 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-05 12:29:04,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-05 12:29:04,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-05 12:29:04,432 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 9 states. [2019-09-05 12:29:04,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:04,718 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2019-09-05 12:29:04,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-05 12:29:04,722 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2019-09-05 12:29:04,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:04,723 INFO L225 Difference]: With dead ends: 69 [2019-09-05 12:29:04,723 INFO L226 Difference]: Without dead ends: 67 [2019-09-05 12:29:04,724 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:29:04,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-05 12:29:04,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 40. [2019-09-05 12:29:04,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-05 12:29:04,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2019-09-05 12:29:04,732 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 28 [2019-09-05 12:29:04,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:04,732 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2019-09-05 12:29:04,733 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-05 12:29:04,733 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2019-09-05 12:29:04,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-05 12:29:04,734 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:04,734 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:04,734 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:04,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:04,735 INFO L82 PathProgramCache]: Analyzing trace with hash 389577448, now seen corresponding path program 3 times [2019-09-05 12:29:04,735 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:04,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:04,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:04,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:04,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:04,741 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:04,741 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:04,741 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:04,761 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:29:04,778 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-05 12:29:04,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:04,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-05 12:29:04,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:04,892 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:04,894 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:04,981 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:05,020 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-05 12:29:05,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:05,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-05 12:29:05,024 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-05 12:29:05,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-05 12:29:05,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:29:05,025 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 11 states. [2019-09-05 12:29:07,385 WARN L188 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2019-09-05 12:29:07,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:07,468 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2019-09-05 12:29:07,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-05 12:29:07,469 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2019-09-05 12:29:07,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:07,470 INFO L225 Difference]: With dead ends: 74 [2019-09-05 12:29:07,470 INFO L226 Difference]: Without dead ends: 40 [2019-09-05 12:29:07,471 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2019-09-05 12:29:07,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-05 12:29:07,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-09-05 12:29:07,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-05 12:29:07,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-09-05 12:29:07,477 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2019-09-05 12:29:07,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:07,477 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-09-05 12:29:07,477 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-05 12:29:07,477 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-09-05 12:29:07,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-05 12:29:07,478 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:07,478 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:07,479 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:07,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:07,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1284065066, now seen corresponding path program 2 times [2019-09-05 12:29:07,479 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:07,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:07,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:07,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:07,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:07,483 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:07,484 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:07,484 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-05 12:29:07,508 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:07,522 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:29:07,522 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:07,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-05 12:29:07,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:07,840 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-05 12:29:07,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:07,884 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-05 12:29:07,884 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-05 12:29:07,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-05 12:29:07,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:29:07,885 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 11 states. [2019-09-05 12:29:08,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:08,172 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-09-05 12:29:08,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-05 12:29:08,172 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2019-09-05 12:29:08,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:08,174 INFO L225 Difference]: With dead ends: 54 [2019-09-05 12:29:08,174 INFO L226 Difference]: Without dead ends: 52 [2019-09-05 12:29:08,174 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-09-05 12:29:08,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-05 12:29:08,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2019-09-05 12:29:08,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-09-05 12:29:08,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-09-05 12:29:08,181 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 37 [2019-09-05 12:29:08,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:08,181 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-09-05 12:29:08,181 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-05 12:29:08,182 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-09-05 12:29:08,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-05 12:29:08,183 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:08,183 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:08,183 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:08,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:08,183 INFO L82 PathProgramCache]: Analyzing trace with hash 393904434, now seen corresponding path program 3 times [2019-09-05 12:29:08,183 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:08,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:08,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:08,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:08,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:08,188 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:08,188 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:08,188 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:08,200 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:29:08,255 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-05 12:29:08,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:08,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-05 12:29:08,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:08,284 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:08,285 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:09,526 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:09,527 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:11,412 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:11,413 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:13,521 WARN L188 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2019-09-05 12:29:13,523 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:13,524 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:15,701 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 37 refuted. 2 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-05 12:29:15,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:15,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-05 12:29:15,833 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-05 12:29:15,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-05 12:29:15,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=141, Unknown=5, NotChecked=0, Total=182 [2019-09-05 12:29:15,835 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 14 states. [2019-09-05 12:29:28,677 WARN L188 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2019-09-05 12:29:35,916 WARN L188 SmtUtils]: Spent 4.95 s on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2019-09-05 12:29:37,780 WARN L188 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2019-09-05 12:29:41,385 WARN L188 SmtUtils]: Spent 2.90 s on a formula simplification that was a NOOP. DAG size: 51 [2019-09-05 12:29:48,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:48,132 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2019-09-05 12:29:48,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-05 12:29:48,133 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2019-09-05 12:29:48,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:48,134 INFO L225 Difference]: With dead ends: 63 [2019-09-05 12:29:48,135 INFO L226 Difference]: Without dead ends: 61 [2019-09-05 12:29:48,136 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=89, Invalid=364, Unknown=9, NotChecked=0, Total=462 [2019-09-05 12:29:48,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-05 12:29:48,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2019-09-05 12:29:48,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-05 12:29:48,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2019-09-05 12:29:48,144 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 46 [2019-09-05 12:29:48,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:48,144 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2019-09-05 12:29:48,144 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-05 12:29:48,144 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2019-09-05 12:29:48,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-05 12:29:48,145 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:48,145 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:48,146 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:48,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:48,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1368789034, now seen corresponding path program 4 times [2019-09-05 12:29:48,146 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:48,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:48,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:48,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:48,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:48,150 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:48,151 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:48,151 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-05 12:29:48,164 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:29:48,182 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:29:48,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:48,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 44 conjunts are in the unsatisfiable core [2019-09-05 12:29:48,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:50,695 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2019-09-05 12:29:51,487 WARN L188 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2019-09-05 12:29:51,673 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2019-09-05 12:29:51,676 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 12 proven. 70 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-09-05 12:29:51,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:51,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-05 12:29:51,737 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-05 12:29:51,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-05 12:29:51,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2019-09-05 12:29:51,738 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 18 states. [2019-09-05 12:29:53,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:29:53,646 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2019-09-05 12:29:53,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-05 12:29:53,649 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2019-09-05 12:29:53,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:29:53,651 INFO L225 Difference]: With dead ends: 72 [2019-09-05 12:29:53,651 INFO L226 Difference]: Without dead ends: 70 [2019-09-05 12:29:53,651 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2019-09-05 12:29:53,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-05 12:29:53,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2019-09-05 12:29:53,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-09-05 12:29:53,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2019-09-05 12:29:53,660 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 55 [2019-09-05 12:29:53,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:29:53,660 INFO L475 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2019-09-05 12:29:53,660 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-05 12:29:53,660 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2019-09-05 12:29:53,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-05 12:29:53,661 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:29:53,662 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:29:53,662 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:29:53,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:29:53,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1447045070, now seen corresponding path program 5 times [2019-09-05 12:29:53,662 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:29:53,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:29:53,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:53,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:29:53,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:29:53,666 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:29:53,666 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:29:53,667 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:29:53,682 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:29:53,711 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-09-05 12:29:53,712 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:29:53,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 47 conjunts are in the unsatisfiable core [2019-09-05 12:29:53,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:29:54,315 WARN L188 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2019-09-05 12:29:56,752 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2019-09-05 12:29:57,349 WARN L188 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2019-09-05 12:29:57,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:29:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 14 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-09-05 12:29:57,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:29:57,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-09-05 12:29:57,871 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-05 12:29:57,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-05 12:29:57,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=333, Unknown=1, NotChecked=0, Total=380 [2019-09-05 12:29:57,873 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 20 states. [2019-09-05 12:30:00,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:30:00,888 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2019-09-05 12:30:00,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-05 12:30:00,888 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 64 [2019-09-05 12:30:00,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:30:00,890 INFO L225 Difference]: With dead ends: 81 [2019-09-05 12:30:00,890 INFO L226 Difference]: Without dead ends: 79 [2019-09-05 12:30:00,890 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=57, Invalid=404, Unknown=1, NotChecked=0, Total=462 [2019-09-05 12:30:00,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-05 12:30:00,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2019-09-05 12:30:00,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-05 12:30:00,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2019-09-05 12:30:00,899 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 64 [2019-09-05 12:30:00,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:30:00,900 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2019-09-05 12:30:00,900 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-05 12:30:00,900 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2019-09-05 12:30:00,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-05 12:30:00,901 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:30:00,901 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:30:00,901 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:30:00,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:30:00,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1919064362, now seen corresponding path program 6 times [2019-09-05 12:30:00,902 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:30:00,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:30:00,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:00,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:30:00,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:30:00,906 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:30:00,906 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:30:00,906 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:30:00,930 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:30:01,047 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-09-05 12:30:01,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:30:01,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-05 12:30:01,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:30:03,467 WARN L188 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 19 [2019-09-05 12:30:03,588 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:03,589 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:04,127 WARN L188 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2019-09-05 12:30:07,055 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2019-09-05 12:30:07,057 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:07,057 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:09,599 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:09,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:13,906 WARN L188 SmtUtils]: Spent 2.63 s on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2019-09-05 12:30:13,920 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:13,920 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:28,444 WARN L188 SmtUtils]: Spent 11.36 s on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2019-09-05 12:30:33,348 WARN L188 SmtUtils]: Spent 475.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-09-05 12:30:41,747 WARN L188 SmtUtils]: Spent 5.74 s on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2019-09-05 12:30:41,749 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:41,750 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:54,406 WARN L188 SmtUtils]: Spent 6.32 s on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2019-09-05 12:30:54,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:30:54,475 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 30 proven. 118 refuted. 15 times theorem prover too weak. 54 trivial. 0 not checked. [2019-09-05 12:30:54,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:30:54,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-09-05 12:30:54,478 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-05 12:30:54,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-05 12:30:54,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=299, Unknown=18, NotChecked=0, Total=380 [2019-09-05 12:30:54,480 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 20 states. [2019-09-05 12:30:55,795 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 21 [2019-09-05 12:30:57,970 WARN L188 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2019-09-05 12:31:04,688 WARN L188 SmtUtils]: Spent 3.01 s on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2019-09-05 12:31:12,188 WARN L188 SmtUtils]: Spent 4.62 s on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2019-09-05 12:31:25,183 WARN L188 SmtUtils]: Spent 3.45 s on a formula simplification. DAG size of input: 60 DAG size of output: 32 [2019-09-05 12:31:28,011 WARN L188 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2019-09-05 12:31:35,985 WARN L188 SmtUtils]: Spent 5.11 s on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2019-09-05 12:31:42,782 WARN L188 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2019-09-05 12:31:45,191 WARN L188 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2019-09-05 12:31:59,667 WARN L188 SmtUtils]: Spent 9.72 s on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2019-09-05 12:32:16,281 WARN L188 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2019-09-05 12:32:19,675 WARN L188 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2019-09-05 12:32:44,786 WARN L188 SmtUtils]: Spent 8.56 s on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2019-09-05 12:33:07,822 WARN L188 SmtUtils]: Spent 8.66 s on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2019-09-05 12:33:42,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:33:42,544 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2019-09-05 12:33:42,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-05 12:33:42,544 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 73 [2019-09-05 12:33:42,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:33:42,546 INFO L225 Difference]: With dead ends: 90 [2019-09-05 12:33:42,546 INFO L226 Difference]: Without dead ends: 88 [2019-09-05 12:33:42,547 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 161.5s TimeCoverageRelationStatistics Valid=241, Invalid=1040, Unknown=51, NotChecked=0, Total=1332 [2019-09-05 12:33:42,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-09-05 12:33:42,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2019-09-05 12:33:42,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-09-05 12:33:42,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2019-09-05 12:33:42,560 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 73 [2019-09-05 12:33:42,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:33:42,561 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2019-09-05 12:33:42,561 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-05 12:33:42,561 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2019-09-05 12:33:42,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-09-05 12:33:42,562 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:33:42,562 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:33:42,563 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:33:42,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:33:42,563 INFO L82 PathProgramCache]: Analyzing trace with hash -67277006, now seen corresponding path program 7 times [2019-09-05 12:33:42,563 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:33:42,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:33:42,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:33:42,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:33:42,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:33:42,567 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:33:42,568 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:33:42,568 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:33:42,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:33:42,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:33:42,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 62 conjunts are in the unsatisfiable core [2019-09-05 12:33:42,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:33:43,244 WARN L188 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2019-09-05 12:33:43,439 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2019-09-05 12:33:46,382 WARN L188 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2019-09-05 12:33:47,317 WARN L188 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2019-09-05 12:33:47,574 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2019-09-05 12:33:48,093 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:33:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 18 proven. 175 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-09-05 12:33:48,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:33:48,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-05 12:33:48,193 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-05 12:33:48,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-05 12:33:48,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2019-09-05 12:33:48,194 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 24 states. [2019-09-05 12:33:55,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:33:55,962 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2019-09-05 12:33:55,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-05 12:33:55,963 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2019-09-05 12:33:55,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:33:55,965 INFO L225 Difference]: With dead ends: 99 [2019-09-05 12:33:55,965 INFO L226 Difference]: Without dead ends: 97 [2019-09-05 12:33:55,966 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2019-09-05 12:33:55,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-09-05 12:33:55,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2019-09-05 12:33:55,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-09-05 12:33:55,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2019-09-05 12:33:55,985 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 82 [2019-09-05 12:33:55,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:33:55,985 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2019-09-05 12:33:55,985 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-05 12:33:55,985 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2019-09-05 12:33:55,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-05 12:33:55,990 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:33:55,990 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:33:55,991 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:33:55,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:33:55,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1501634006, now seen corresponding path program 8 times [2019-09-05 12:33:55,991 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:33:55,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:33:55,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:33:55,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:33:55,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:33:56,001 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:33:56,002 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:33:56,002 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:33:56,034 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:33:56,065 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:33:56,066 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:33:56,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 68 conjunts are in the unsatisfiable core [2019-09-05 12:33:56,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:33:57,918 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:33:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 17 proven. 223 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 12:33:58,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:33:58,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-09-05 12:33:58,053 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-05 12:33:58,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-05 12:33:58,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2019-09-05 12:33:58,054 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 26 states. [2019-09-05 12:34:02,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:34:02,111 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2019-09-05 12:34:02,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-05 12:34:02,111 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 91 [2019-09-05 12:34:02,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:34:02,112 INFO L225 Difference]: With dead ends: 108 [2019-09-05 12:34:02,113 INFO L226 Difference]: Without dead ends: 106 [2019-09-05 12:34:02,114 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2019-09-05 12:34:02,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-09-05 12:34:02,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2019-09-05 12:34:02,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-09-05 12:34:02,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2019-09-05 12:34:02,125 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 91 [2019-09-05 12:34:02,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:34:02,125 INFO L475 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2019-09-05 12:34:02,125 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-05 12:34:02,125 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2019-09-05 12:34:02,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-05 12:34:02,126 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:34:02,127 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:34:02,127 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:34:02,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:34:02,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1734130126, now seen corresponding path program 9 times [2019-09-05 12:34:02,127 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:34:02,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:34:02,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:34:02,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:34:02,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:34:02,132 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:34:02,132 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:34:02,132 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:34:02,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:34:02,273 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-09-05 12:34:02,273 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:34:02,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 34 conjunts are in the unsatisfiable core [2019-09-05 12:34:02,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:34:02,283 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:34:02,284 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:34:02,419 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:34:02,420 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:34:04,567 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:34:04,568 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:34:08,312 WARN L188 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2019-09-05 12:34:08,313 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:34:08,313 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:34:13,259 WARN L188 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2019-09-05 12:34:13,260 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:34:13,260 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:34:19,965 WARN L188 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2019-09-05 12:34:27,167 WARN L188 SmtUtils]: Spent 2.57 s on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2019-09-05 12:34:27,169 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:34:27,169 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:34:42,381 WARN L188 SmtUtils]: Spent 2.85 s on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2019-09-05 12:35:00,673 WARN L188 SmtUtils]: Spent 9.54 s on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2019-09-05 12:35:00,675 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:35:00,675 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:37:07,718 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-09-05 12:37:07,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:37:07,921 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.checkSat(ManagedScript.java:141) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:84) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:934) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:581) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:232) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:453) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1428) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:631) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 39 more [2019-09-05 12:37:07,926 INFO L168 Benchmark]: Toolchain (without parser) took 490032.49 ms. Allocated memory was 133.7 MB in the beginning and 263.7 MB in the end (delta: 130.0 MB). Free memory was 88.3 MB in the beginning and 161.1 MB in the end (delta: -72.9 MB). Peak memory consumption was 57.2 MB. Max. memory is 7.1 GB. [2019-09-05 12:37:07,927 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 133.7 MB. Free memory is still 106.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-09-05 12:37:07,928 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.05 ms. Allocated memory is still 133.7 MB. Free memory was 87.9 MB in the beginning and 78.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-09-05 12:37:07,928 INFO L168 Benchmark]: Boogie Preprocessor took 144.33 ms. Allocated memory was 133.7 MB in the beginning and 201.9 MB in the end (delta: 68.2 MB). Free memory was 78.5 MB in the beginning and 177.8 MB in the end (delta: -99.3 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2019-09-05 12:37:07,929 INFO L168 Benchmark]: RCFGBuilder took 235.88 ms. Allocated memory is still 201.9 MB. Free memory was 177.8 MB in the beginning and 166.3 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2019-09-05 12:37:07,930 INFO L168 Benchmark]: TraceAbstraction took 489396.36 ms. Allocated memory was 201.9 MB in the beginning and 263.7 MB in the end (delta: 61.9 MB). Free memory was 165.4 MB in the beginning and 161.1 MB in the end (delta: 4.3 MB). Peak memory consumption was 66.2 MB. Max. memory is 7.1 GB. [2019-09-05 12:37:07,933 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 133.7 MB. Free memory is still 106.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.05 ms. Allocated memory is still 133.7 MB. Free memory was 87.9 MB in the beginning and 78.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 144.33 ms. Allocated memory was 133.7 MB in the beginning and 201.9 MB in the end (delta: 68.2 MB). Free memory was 78.5 MB in the beginning and 177.8 MB in the end (delta: -99.3 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 235.88 ms. Allocated memory is still 201.9 MB. Free memory was 177.8 MB in the beginning and 166.3 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 489396.36 ms. Allocated memory was 201.9 MB in the beginning and 263.7 MB in the end (delta: 61.9 MB). Free memory was 165.4 MB in the beginning and 161.1 MB in the end (delta: 4.3 MB). Peak memory consumption was 66.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...