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/ps2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:17:31,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:17:31,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:17:31,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:17:31,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:17:31,087 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:17:31,089 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:17:31,100 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:17:31,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:17:31,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:17:31,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:17:31,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:17:31,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:17:31,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:17:31,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:17:31,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:17:31,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:17:31,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:17:31,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:17:31,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:17:31,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:17:31,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:17:31,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:17:31,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:17:31,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:17:31,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:17:31,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:17:31,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:17:31,153 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:17:31,168 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:17:31,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:17:31,169 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:17:31,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:17:31,169 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:17:31,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:17:31,170 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:17:31,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:17:31,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:17:31,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:17:31,171 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:17:31,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:17:31,171 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:17:31,171 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:17:31,171 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:17:31,172 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:17:31,172 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:17:31,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:17:31,172 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:17:31,173 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:17:31,173 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:17:31,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:17:31,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:17:31,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:17:31,174 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:17:31,174 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:17:31,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:17:31,174 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:17:31,174 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:17:31,496 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:17:31,515 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:17:31,519 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:17:31,520 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:17:31,521 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:17:31,521 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps2.c [2019-10-14 23:17:31,592 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11ca04a03/fcecac21d84945928f9792b849e10e7a/FLAG5132ed31b [2019-10-14 23:17:32,038 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:17:32,039 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps2.c [2019-10-14 23:17:32,045 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11ca04a03/fcecac21d84945928f9792b849e10e7a/FLAG5132ed31b [2019-10-14 23:17:32,450 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11ca04a03/fcecac21d84945928f9792b849e10e7a [2019-10-14 23:17:32,460 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:17:32,461 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:17:32,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:32,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:17:32,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:17:32,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:32" (1/1) ... [2019-10-14 23:17:32,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b193a18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:32, skipping insertion in model container [2019-10-14 23:17:32,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:32" (1/1) ... [2019-10-14 23:17:32,478 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:17:32,499 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:17:32,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:32,685 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:17:32,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:32,712 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:17:32,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:32 WrapperNode [2019-10-14 23:17:32,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:32,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:17:32,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:17:32,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:17:32,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:32" (1/1) ... [2019-10-14 23:17:32,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:32" (1/1) ... [2019-10-14 23:17:32,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:32" (1/1) ... [2019-10-14 23:17:32,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:32" (1/1) ... [2019-10-14 23:17:32,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:32" (1/1) ... [2019-10-14 23:17:32,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:32" (1/1) ... [2019-10-14 23:17:32,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:32" (1/1) ... [2019-10-14 23:17:32,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:17:32,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:17:32,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:17:32,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:17:32,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:17:32,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:17:32,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:17:32,882 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:17:32,882 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:17:32,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:17:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:17:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:17:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:17:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:17:32,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:17:32,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:17:33,043 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:17:33,044 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:17:33,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:33 BoogieIcfgContainer [2019-10-14 23:17:33,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:17:33,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:17:33,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:17:33,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:17:33,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:17:32" (1/3) ... [2019-10-14 23:17:33,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d137ae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:33, skipping insertion in model container [2019-10-14 23:17:33,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:32" (2/3) ... [2019-10-14 23:17:33,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d137ae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:33, skipping insertion in model container [2019-10-14 23:17:33,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:33" (3/3) ... [2019-10-14 23:17:33,053 INFO L109 eAbstractionObserver]: Analyzing ICFG ps2.c [2019-10-14 23:17:33,063 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:17:33,070 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:17:33,081 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:17:33,104 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:17:33,104 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:17:33,104 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:17:33,104 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:17:33,104 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:17:33,104 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:17:33,104 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:17:33,105 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:17:33,118 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-14 23:17:33,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:17:33,122 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:33,123 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:33,124 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:33,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:33,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1712389503, now seen corresponding path program 1 times [2019-10-14 23:17:33,135 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:33,136 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690572552] [2019-10-14 23:17:33,136 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:33,136 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:33,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:33,230 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690572552] [2019-10-14 23:17:33,231 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:33,232 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:17:33,232 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120790873] [2019-10-14 23:17:33,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:17:33,237 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:33,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:17:33,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:17:33,255 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-10-14 23:17:33,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:33,279 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2019-10-14 23:17:33,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:17:33,280 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-14 23:17:33,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:33,291 INFO L225 Difference]: With dead ends: 35 [2019-10-14 23:17:33,291 INFO L226 Difference]: Without dead ends: 15 [2019-10-14 23:17:33,297 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:17:33,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-14 23:17:33,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-14 23:17:33,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-14 23:17:33,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-10-14 23:17:33,336 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2019-10-14 23:17:33,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:33,337 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-10-14 23:17:33,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:17:33,337 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-10-14 23:17:33,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:17:33,338 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:33,338 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:33,338 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:33,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:33,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1704941753, now seen corresponding path program 1 times [2019-10-14 23:17:33,340 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:33,341 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252508805] [2019-10-14 23:17:33,341 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:33,341 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:33,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:33,350 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:33,350 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072889160] [2019-10-14 23:17:33,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:33,386 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:17:33,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:33,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:33,474 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252508805] [2019-10-14 23:17:33,474 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:33,475 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072889160] [2019-10-14 23:17:33,475 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:33,475 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:17:33,476 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156881453] [2019-10-14 23:17:33,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:17:33,477 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:33,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:17:33,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:17:33,478 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2019-10-14 23:17:33,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:33,569 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2019-10-14 23:17:33,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:17:33,570 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-14 23:17:33,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:33,571 INFO L225 Difference]: With dead ends: 25 [2019-10-14 23:17:33,571 INFO L226 Difference]: Without dead ends: 22 [2019-10-14 23:17:33,572 INFO L600 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 [2019-10-14 23:17:33,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-14 23:17:33,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-14 23:17:33,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-14 23:17:33,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-10-14 23:17:33,580 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2019-10-14 23:17:33,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:33,580 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-10-14 23:17:33,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:17:33,580 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-10-14 23:17:33,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 23:17:33,581 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:33,582 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:33,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:33,784 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:33,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:33,785 INFO L82 PathProgramCache]: Analyzing trace with hash 241116926, now seen corresponding path program 1 times [2019-10-14 23:17:33,786 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:33,787 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039457733] [2019-10-14 23:17:33,787 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:33,788 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:33,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:33,801 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:33,801 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [41092281] [2019-10-14 23:17:33,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:33,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 23:17:33,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:33,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039457733] [2019-10-14 23:17:33,952 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:33,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41092281] [2019-10-14 23:17:33,952 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:33,953 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 23:17:33,953 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802838270] [2019-10-14 23:17:33,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:17:33,954 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:33,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:17:33,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:33,955 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 8 states. [2019-10-14 23:17:34,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:34,127 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2019-10-14 23:17:34,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:17:34,128 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-10-14 23:17:34,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:34,129 INFO L225 Difference]: With dead ends: 32 [2019-10-14 23:17:34,129 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 23:17:34,130 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:34,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 23:17:34,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-14 23:17:34,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:17:34,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-10-14 23:17:34,137 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2019-10-14 23:17:34,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:34,138 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-10-14 23:17:34,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:17:34,138 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-10-14 23:17:34,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 23:17:34,139 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:34,139 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:34,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:34,345 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:34,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:34,345 INFO L82 PathProgramCache]: Analyzing trace with hash 311210265, now seen corresponding path program 2 times [2019-10-14 23:17:34,346 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:34,346 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705567712] [2019-10-14 23:17:34,346 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:34,346 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:34,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:34,358 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:34,358 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015889135] [2019-10-14 23:17:34,358 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:34,388 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:34,389 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:34,390 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:17:34,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:34,489 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:17:34,490 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705567712] [2019-10-14 23:17:34,490 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:34,491 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015889135] [2019-10-14 23:17:34,491 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:34,491 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:17:34,491 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756352750] [2019-10-14 23:17:34,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:17:34,493 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:34,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:17:34,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:34,494 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 9 states. [2019-10-14 23:17:34,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:34,646 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2019-10-14 23:17:34,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:17:34,647 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-10-14 23:17:34,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:34,649 INFO L225 Difference]: With dead ends: 39 [2019-10-14 23:17:34,649 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 23:17:34,651 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:17:34,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 23:17:34,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-14 23:17:34,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 23:17:34,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-10-14 23:17:34,666 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2019-10-14 23:17:34,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:34,667 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-10-14 23:17:34,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:17:34,668 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-10-14 23:17:34,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 23:17:34,669 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:34,669 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:34,870 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:34,871 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:34,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:34,871 INFO L82 PathProgramCache]: Analyzing trace with hash -928013666, now seen corresponding path program 3 times [2019-10-14 23:17:34,872 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:34,872 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105109416] [2019-10-14 23:17:34,873 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:34,873 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:34,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:34,880 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:34,881 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [563703185] [2019-10-14 23:17:34,881 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:34,919 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 23:17:34,919 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:34,920 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:17:34,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:34,979 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 23:17:35,013 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105109416] [2019-10-14 23:17:35,013 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:35,013 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563703185] [2019-10-14 23:17:35,013 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:35,013 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:17:35,014 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631153123] [2019-10-14 23:17:35,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:17:35,014 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:35,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:17:35,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:35,016 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 7 states. [2019-10-14 23:17:35,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:35,050 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-10-14 23:17:35,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:17:35,050 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2019-10-14 23:17:35,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:35,051 INFO L225 Difference]: With dead ends: 36 [2019-10-14 23:17:35,051 INFO L226 Difference]: Without dead ends: 0 [2019-10-14 23:17:35,052 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:35,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-14 23:17:35,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-14 23:17:35,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-14 23:17:35,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-14 23:17:35,053 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2019-10-14 23:17:35,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:35,053 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-14 23:17:35,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:17:35,054 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-14 23:17:35,054 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-14 23:17:35,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:35,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-14 23:17:35,364 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-10-14 23:17:35,364 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:17:35,364 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:17:35,364 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-14 23:17:35,365 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-14 23:17:35,365 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-14 23:17:35,365 INFO L443 ceAbstractionStarter]: For program point L30(line 30) no Hoare annotation was computed. [2019-10-14 23:17:35,365 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 12 33) the Hoare annotation is: true [2019-10-14 23:17:35,365 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 12 33) no Hoare annotation was computed. [2019-10-14 23:17:35,365 INFO L439 ceAbstractionStarter]: At program point L21(line 21) the Hoare annotation is: (= (* 2 main_~x~0) (+ main_~y~0 (* main_~y~0 main_~y~0))) [2019-10-14 23:17:35,366 INFO L443 ceAbstractionStarter]: For program point L21-1(lines 20 29) no Hoare annotation was computed. [2019-10-14 23:17:35,366 INFO L439 ceAbstractionStarter]: At program point L20-2(lines 20 29) the Hoare annotation is: (= (* 2 main_~x~0) (+ main_~y~0 (* main_~y~0 main_~y~0))) [2019-10-14 23:17:35,366 INFO L439 ceAbstractionStarter]: At program point L20-3(lines 20 29) the Hoare annotation is: (= (* 2 main_~x~0) (+ main_~y~0 (* main_~y~0 main_~y~0))) [2019-10-14 23:17:35,366 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 12 33) no Hoare annotation was computed. [2019-10-14 23:17:35,366 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 4 10) the Hoare annotation is: true [2019-10-14 23:17:35,366 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2019-10-14 23:17:35,367 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 4 10) no Hoare annotation was computed. [2019-10-14 23:17:35,367 INFO L443 ceAbstractionStarter]: For program point L6(lines 6 7) no Hoare annotation was computed. [2019-10-14 23:17:35,367 INFO L443 ceAbstractionStarter]: For program point L5(lines 5 8) no Hoare annotation was computed. [2019-10-14 23:17:35,367 INFO L443 ceAbstractionStarter]: For program point L5-2(lines 4 10) no Hoare annotation was computed. [2019-10-14 23:17:35,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:17:35 BoogieIcfgContainer [2019-10-14 23:17:35,382 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-14 23:17:35,385 INFO L168 Benchmark]: Toolchain (without parser) took 2922.71 ms. Allocated memory was 146.8 MB in the beginning and 232.8 MB in the end (delta: 86.0 MB). Free memory was 104.8 MB in the beginning and 164.6 MB in the end (delta: -59.9 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. [2019-10-14 23:17:35,386 INFO L168 Benchmark]: CDTParser took 0.43 ms. Allocated memory is still 146.8 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-14 23:17:35,387 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.65 ms. Allocated memory is still 146.8 MB. Free memory was 104.6 MB in the beginning and 95.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-10-14 23:17:35,388 INFO L168 Benchmark]: Boogie Preprocessor took 116.37 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 95.1 MB in the beginning and 182.6 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2019-10-14 23:17:35,388 INFO L168 Benchmark]: RCFGBuilder took 215.16 ms. Allocated memory is still 203.9 MB. Free memory was 182.6 MB in the beginning and 171.5 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2019-10-14 23:17:35,389 INFO L168 Benchmark]: TraceAbstraction took 2336.27 ms. Allocated memory was 203.9 MB in the beginning and 232.8 MB in the end (delta: 28.8 MB). Free memory was 170.9 MB in the beginning and 164.6 MB in the end (delta: 6.3 MB). Peak memory consumption was 35.1 MB. Max. memory is 7.1 GB. [2019-10-14 23:17:35,396 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43 ms. Allocated memory is still 146.8 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 250.65 ms. Allocated memory is still 146.8 MB. Free memory was 104.6 MB in the beginning and 95.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.37 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 95.1 MB in the beginning and 182.6 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 215.16 ms. Allocated memory is still 203.9 MB. Free memory was 182.6 MB in the beginning and 171.5 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2336.27 ms. Allocated memory was 203.9 MB in the beginning and 232.8 MB in the end (delta: 28.8 MB). Free memory was 170.9 MB in the beginning and 164.6 MB in the end (delta: 6.3 MB). Peak memory consumption was 35.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 2 * x == y + y * y - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Result: SAFE, OverallTime: 2.2s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 72 SDtfs, 40 SDslu, 203 SDs, 0 SdLazy, 160 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 17 PreInvPairs, 29 NumberOfFragments, 32 HoareAnnotationTreeSize, 17 FomulaSimplifications, 112 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 26 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 92 NumberOfCodeBlocks, 78 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 87 ConstructedInterpolants, 0 QuantifiedInterpolants, 5307 SizeOfPredicates, 11 NumberOfNonLiveVariables, 188 ConjunctsInSsa, 67 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 37/52 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...