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/cohendiv.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:17:10,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:17:10,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:17:10,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:17:10,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:17:10,392 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:17:10,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:17:10,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:17:10,406 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:17:10,409 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:17:10,411 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:17:10,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:17:10,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:17:10,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:17:10,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:17:10,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:17:10,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:17:10,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:17:10,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:17:10,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:17:10,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:17:10,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:17:10,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:17:10,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:17:10,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:17:10,441 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:17:10,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:17:10,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:17:10,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:17:10,444 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:17:10,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:17:10,445 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:17:10,445 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:17:10,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:17:10,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:17:10,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:17:10,448 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 23:17:10,475 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:17:10,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:17:10,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:17:10,477 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:17:10,478 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:17:10,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:17:10,478 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:17:10,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:17:10,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:17:10,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:17:10,480 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:17:10,480 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:17:10,480 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:17:10,481 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:17:10,481 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:17:10,481 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:17:10,481 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:17:10,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:17:10,482 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:17:10,482 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:17:10,482 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:17:10,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:17:10,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:17:10,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:17:10,483 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:17:10,483 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:17:10,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:17:10,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:17:10,483 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:17:10,766 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:17:10,781 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:17:10,785 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:17:10,786 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:17:10,787 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:17:10,788 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/cohendiv.c [2019-10-14 23:17:10,847 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa1103d33/af58a13f296145f981b0410b1d4a6054/FLAG8b204efc0 [2019-10-14 23:17:11,282 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:17:11,283 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/cohendiv.c [2019-10-14 23:17:11,289 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa1103d33/af58a13f296145f981b0410b1d4a6054/FLAG8b204efc0 [2019-10-14 23:17:11,677 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa1103d33/af58a13f296145f981b0410b1d4a6054 [2019-10-14 23:17:11,687 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:17:11,689 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:17:11,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:11,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:17:11,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:17:11,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:11" (1/1) ... [2019-10-14 23:17:11,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@343aa16a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:11, skipping insertion in model container [2019-10-14 23:17:11,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:11" (1/1) ... [2019-10-14 23:17:11,710 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:17:11,730 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:17:11,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:11,915 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:17:11,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:11,945 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:17:11,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:11 WrapperNode [2019-10-14 23:17:11,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:11,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:17:11,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:17:11,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:17:12,036 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:11" (1/1) ... [2019-10-14 23:17:12,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:11" (1/1) ... [2019-10-14 23:17:12,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:11" (1/1) ... [2019-10-14 23:17:12,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:11" (1/1) ... [2019-10-14 23:17:12,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:11" (1/1) ... [2019-10-14 23:17:12,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:11" (1/1) ... [2019-10-14 23:17:12,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:11" (1/1) ... [2019-10-14 23:17:12,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:17:12,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:17:12,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:17:12,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:17:12,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:11" (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 23:17:12,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:17:12,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:17:12,121 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:17:12,121 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:17:12,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:17:12,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:17:12,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:17:12,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:17:12,124 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:17:12,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:17:12,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:17:12,324 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:17:12,324 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-14 23:17:12,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:12 BoogieIcfgContainer [2019-10-14 23:17:12,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:17:12,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:17:12,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:17:12,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:17:12,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:17:11" (1/3) ... [2019-10-14 23:17:12,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c536259 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:12, skipping insertion in model container [2019-10-14 23:17:12,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:11" (2/3) ... [2019-10-14 23:17:12,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c536259 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:12, skipping insertion in model container [2019-10-14 23:17:12,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:12" (3/3) ... [2019-10-14 23:17:12,336 INFO L109 eAbstractionObserver]: Analyzing ICFG cohendiv.c [2019-10-14 23:17:12,348 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:17:12,356 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:17:12,372 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:17:12,398 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:17:12,399 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:17:12,399 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:17:12,399 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:17:12,399 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:17:12,399 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:17:12,400 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:17:12,400 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:17:12,421 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-10-14 23:17:12,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:17:12,427 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:12,428 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:12,430 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:12,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:12,436 INFO L82 PathProgramCache]: Analyzing trace with hash -14138861, now seen corresponding path program 1 times [2019-10-14 23:17:12,445 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:12,446 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039622360] [2019-10-14 23:17:12,446 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:12,446 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:12,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:12,563 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 23:17:12,564 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039622360] [2019-10-14 23:17:12,564 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:12,565 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:17:12,565 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120368371] [2019-10-14 23:17:12,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:17:12,569 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:12,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:17:12,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:17:12,581 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-10-14 23:17:12,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:12,608 INFO L93 Difference]: Finished difference Result 53 states and 84 transitions. [2019-10-14 23:17:12,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:17:12,610 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-14 23:17:12,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:12,620 INFO L225 Difference]: With dead ends: 53 [2019-10-14 23:17:12,620 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 23:17:12,624 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 23:17:12,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 23:17:12,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-14 23:17:12,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 23:17:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2019-10-14 23:17:12,669 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 10 [2019-10-14 23:17:12,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:12,670 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2019-10-14 23:17:12,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:17:12,670 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2019-10-14 23:17:12,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:17:12,671 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:12,671 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:12,671 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:12,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:12,672 INFO L82 PathProgramCache]: Analyzing trace with hash -12649311, now seen corresponding path program 1 times [2019-10-14 23:17:12,672 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:12,673 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500296619] [2019-10-14 23:17:12,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:12,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:12,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:12,682 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:12,683 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804682098] [2019-10-14 23:17:12,683 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 23:17:12,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:12,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 23:17:12,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:12,812 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 23:17:12,813 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500296619] [2019-10-14 23:17:12,813 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:12,813 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804682098] [2019-10-14 23:17:12,814 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:12,814 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:17:12,814 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754289228] [2019-10-14 23:17:12,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:17:12,816 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:12,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:17:12,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:17:12,817 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 5 states. [2019-10-14 23:17:12,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:12,914 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2019-10-14 23:17:12,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:17:12,915 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-14 23:17:12,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:12,916 INFO L225 Difference]: With dead ends: 35 [2019-10-14 23:17:12,917 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 23:17:12,918 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 23:17:12,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 23:17:12,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-10-14 23:17:12,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:17:12,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-10-14 23:17:12,931 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 10 [2019-10-14 23:17:12,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:12,931 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-10-14 23:17:12,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:17:12,932 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-10-14 23:17:12,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 23:17:12,933 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:12,933 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:13,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:13,137 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:13,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:13,138 INFO L82 PathProgramCache]: Analyzing trace with hash 71526866, now seen corresponding path program 1 times [2019-10-14 23:17:13,139 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:13,140 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113320894] [2019-10-14 23:17:13,140 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:13,140 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:13,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:13,148 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:13,148 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58774012] [2019-10-14 23:17:13,149 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 23:17:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:13,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 23:17:13,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:13,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113320894] [2019-10-14 23:17:13,225 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:13,225 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58774012] [2019-10-14 23:17:13,226 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:13,227 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:17:13,227 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126065313] [2019-10-14 23:17:13,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:17:13,228 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:13,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:17:13,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:17:13,230 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2019-10-14 23:17:13,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:13,332 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2019-10-14 23:17:13,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:17:13,332 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-10-14 23:17:13,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:13,334 INFO L225 Difference]: With dead ends: 47 [2019-10-14 23:17:13,334 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 23:17:13,335 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 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 23:17:13,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 23:17:13,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2019-10-14 23:17:13,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 23:17:13,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2019-10-14 23:17:13,347 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 15 [2019-10-14 23:17:13,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:13,347 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2019-10-14 23:17:13,348 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:17:13,348 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2019-10-14 23:17:13,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 23:17:13,349 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:13,349 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:13,552 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:13,552 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:13,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:13,553 INFO L82 PathProgramCache]: Analyzing trace with hash -365378422, now seen corresponding path program 1 times [2019-10-14 23:17:13,553 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:13,553 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481710892] [2019-10-14 23:17:13,553 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:13,553 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:13,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:13,572 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:13,573 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933156196] [2019-10-14 23:17:13,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:13,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:13,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 23:17:13,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:17:13,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481710892] [2019-10-14 23:17:13,648 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:13,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933156196] [2019-10-14 23:17:13,649 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:13,649 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:17:13,651 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69545370] [2019-10-14 23:17:13,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:17:13,652 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:13,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:17:13,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:17:13,653 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 6 states. [2019-10-14 23:17:13,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:13,807 INFO L93 Difference]: Finished difference Result 69 states and 93 transitions. [2019-10-14 23:17:13,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:17:13,808 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-10-14 23:17:13,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:13,809 INFO L225 Difference]: With dead ends: 69 [2019-10-14 23:17:13,809 INFO L226 Difference]: Without dead ends: 67 [2019-10-14 23:17:13,810 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:13,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-14 23:17:13,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2019-10-14 23:17:13,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-14 23:17:13,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2019-10-14 23:17:13,827 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 22 [2019-10-14 23:17:13,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:13,828 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2019-10-14 23:17:13,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:17:13,828 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2019-10-14 23:17:13,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:17:13,829 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:13,829 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:14,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:14,041 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:14,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:14,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1963256918, now seen corresponding path program 1 times [2019-10-14 23:17:14,042 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:14,042 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843910490] [2019-10-14 23:17:14,043 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:14,043 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:14,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:14,050 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:14,050 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688130020] [2019-10-14 23:17:14,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:14,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:17:14,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:14,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 23:17:14,165 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843910490] [2019-10-14 23:17:14,166 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:14,166 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688130020] [2019-10-14 23:17:14,166 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:14,166 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:17:14,167 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608958330] [2019-10-14 23:17:14,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:17:14,168 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:14,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:17:14,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:17:14,168 INFO L87 Difference]: Start difference. First operand 60 states and 80 transitions. Second operand 6 states. [2019-10-14 23:17:14,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:14,271 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2019-10-14 23:17:14,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:17:14,271 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2019-10-14 23:17:14,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:14,275 INFO L225 Difference]: With dead ends: 66 [2019-10-14 23:17:14,275 INFO L226 Difference]: Without dead ends: 64 [2019-10-14 23:17:14,276 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:14,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-14 23:17:14,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-10-14 23:17:14,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-14 23:17:14,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2019-10-14 23:17:14,310 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 32 [2019-10-14 23:17:14,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:14,311 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2019-10-14 23:17:14,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:17:14,311 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2019-10-14 23:17:14,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 23:17:14,314 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:14,315 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:14,528 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:14,528 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:14,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:14,529 INFO L82 PathProgramCache]: Analyzing trace with hash -363064690, now seen corresponding path program 1 times [2019-10-14 23:17:14,530 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:14,530 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045940016] [2019-10-14 23:17:14,530 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:14,531 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:14,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:14,538 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:14,538 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656730605] [2019-10-14 23:17:14,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:14,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:14,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 23:17:14,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:14,613 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-14 23:17:14,633 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045940016] [2019-10-14 23:17:14,633 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:14,633 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656730605] [2019-10-14 23:17:14,633 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:14,633 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 23:17:14,634 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029582044] [2019-10-14 23:17:14,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:17:14,634 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:14,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:17:14,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:14,635 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand 7 states. [2019-10-14 23:17:14,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:14,778 INFO L93 Difference]: Finished difference Result 77 states and 99 transitions. [2019-10-14 23:17:14,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:17:14,779 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2019-10-14 23:17:14,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:14,781 INFO L225 Difference]: With dead ends: 77 [2019-10-14 23:17:14,781 INFO L226 Difference]: Without dead ends: 75 [2019-10-14 23:17:14,781 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:14,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-14 23:17:14,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2019-10-14 23:17:14,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-14 23:17:14,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2019-10-14 23:17:14,801 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 38 [2019-10-14 23:17:14,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:14,802 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2019-10-14 23:17:14,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:17:14,802 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2019-10-14 23:17:14,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 23:17:14,803 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:14,804 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:15,007 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:15,008 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:15,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:15,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1044881029, now seen corresponding path program 1 times [2019-10-14 23:17:15,009 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:15,009 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366369363] [2019-10-14 23:17:15,010 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:15,010 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:15,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:15,016 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:15,016 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080036231] [2019-10-14 23:17:15,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:15,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 23:17:15,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:15,146 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 23:17:15,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366369363] [2019-10-14 23:17:15,147 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:15,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080036231] [2019-10-14 23:17:15,147 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:15,147 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:17:15,148 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554990535] [2019-10-14 23:17:15,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:17:15,148 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:15,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:17:15,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:15,149 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 7 states. [2019-10-14 23:17:15,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:15,328 INFO L93 Difference]: Finished difference Result 103 states and 134 transitions. [2019-10-14 23:17:15,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:17:15,329 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2019-10-14 23:17:15,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:15,331 INFO L225 Difference]: With dead ends: 103 [2019-10-14 23:17:15,331 INFO L226 Difference]: Without dead ends: 100 [2019-10-14 23:17:15,332 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:15,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-14 23:17:15,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2019-10-14 23:17:15,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-10-14 23:17:15,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2019-10-14 23:17:15,359 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 45 [2019-10-14 23:17:15,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:15,360 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2019-10-14 23:17:15,361 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:17:15,362 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2019-10-14 23:17:15,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 23:17:15,363 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:15,363 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:15,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:15,564 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:15,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:15,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1334705699, now seen corresponding path program 1 times [2019-10-14 23:17:15,565 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:15,566 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093755386] [2019-10-14 23:17:15,566 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:15,566 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:15,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:15,572 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:15,573 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433536533] [2019-10-14 23:17:15,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:15,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:17:15,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 23:17:15,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093755386] [2019-10-14 23:17:15,672 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:15,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433536533] [2019-10-14 23:17:15,672 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:15,672 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:17:15,672 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707757907] [2019-10-14 23:17:15,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:17:15,673 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:15,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:17:15,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:15,674 INFO L87 Difference]: Start difference. First operand 96 states and 126 transitions. Second operand 7 states. [2019-10-14 23:17:15,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:15,848 INFO L93 Difference]: Finished difference Result 135 states and 184 transitions. [2019-10-14 23:17:15,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:17:15,848 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2019-10-14 23:17:15,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:15,850 INFO L225 Difference]: With dead ends: 135 [2019-10-14 23:17:15,850 INFO L226 Difference]: Without dead ends: 133 [2019-10-14 23:17:15,851 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:15,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-10-14 23:17:15,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 121. [2019-10-14 23:17:15,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-10-14 23:17:15,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 163 transitions. [2019-10-14 23:17:15,870 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 163 transitions. Word has length 45 [2019-10-14 23:17:15,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:15,870 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 163 transitions. [2019-10-14 23:17:15,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:17:15,870 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 163 transitions. [2019-10-14 23:17:15,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-14 23:17:15,872 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:15,872 INFO L380 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:16,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:16,076 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:16,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:16,077 INFO L82 PathProgramCache]: Analyzing trace with hash 228915751, now seen corresponding path program 2 times [2019-10-14 23:17:16,077 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:16,077 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758933087] [2019-10-14 23:17:16,078 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:16,078 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:16,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:16,084 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:16,084 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936716046] [2019-10-14 23:17:16,084 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 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 [2019-10-14 23:17:16,119 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:16,119 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:16,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:17:16,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:16,173 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2019-10-14 23:17:16,201 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758933087] [2019-10-14 23:17:16,201 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:16,201 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936716046] [2019-10-14 23:17:16,201 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:16,202 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:17:16,202 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473630888] [2019-10-14 23:17:16,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:17:16,202 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:16,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:17:16,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:16,203 INFO L87 Difference]: Start difference. First operand 121 states and 163 transitions. Second operand 9 states. [2019-10-14 23:17:16,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:16,350 INFO L93 Difference]: Finished difference Result 127 states and 168 transitions. [2019-10-14 23:17:16,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:17:16,351 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2019-10-14 23:17:16,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:16,353 INFO L225 Difference]: With dead ends: 127 [2019-10-14 23:17:16,353 INFO L226 Difference]: Without dead ends: 125 [2019-10-14 23:17:16,354 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:17:16,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-10-14 23:17:16,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2019-10-14 23:17:16,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-14 23:17:16,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 166 transitions. [2019-10-14 23:17:16,389 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 166 transitions. Word has length 61 [2019-10-14 23:17:16,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:16,393 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 166 transitions. [2019-10-14 23:17:16,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:17:16,393 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 166 transitions. [2019-10-14 23:17:16,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-14 23:17:16,398 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:16,399 INFO L380 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:16,599 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:16,600 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:16,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:16,600 INFO L82 PathProgramCache]: Analyzing trace with hash 578907074, now seen corresponding path program 1 times [2019-10-14 23:17:16,601 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:16,601 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988399483] [2019-10-14 23:17:16,601 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:16,601 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:16,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:16,608 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:16,608 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331153404] [2019-10-14 23:17:16,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:16,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:16,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:17:16,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-14 23:17:16,749 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988399483] [2019-10-14 23:17:16,749 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:16,749 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331153404] [2019-10-14 23:17:16,750 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:16,750 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 23:17:16,750 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583729149] [2019-10-14 23:17:16,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:17:16,751 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:16,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:17:16,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:16,751 INFO L87 Difference]: Start difference. First operand 125 states and 166 transitions. Second operand 8 states. [2019-10-14 23:17:16,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:16,998 INFO L93 Difference]: Finished difference Result 166 states and 223 transitions. [2019-10-14 23:17:16,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:17:16,999 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2019-10-14 23:17:16,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:17,001 INFO L225 Difference]: With dead ends: 166 [2019-10-14 23:17:17,001 INFO L226 Difference]: Without dead ends: 163 [2019-10-14 23:17:17,001 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:17,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-10-14 23:17:17,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 132. [2019-10-14 23:17:17,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-10-14 23:17:17,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 173 transitions. [2019-10-14 23:17:17,018 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 173 transitions. Word has length 68 [2019-10-14 23:17:17,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:17,018 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 173 transitions. [2019-10-14 23:17:17,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:17:17,018 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 173 transitions. [2019-10-14 23:17:17,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-14 23:17:17,020 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:17,020 INFO L380 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:17,231 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:17,232 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:17,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:17,232 INFO L82 PathProgramCache]: Analyzing trace with hash -485536924, now seen corresponding path program 2 times [2019-10-14 23:17:17,232 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:17,232 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593283422] [2019-10-14 23:17:17,233 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:17,233 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:17,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:17,238 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:17,239 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470082833] [2019-10-14 23:17:17,239 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 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 [2019-10-14 23:17:17,278 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:17,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:17,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:17:17,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-10-14 23:17:17,334 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593283422] [2019-10-14 23:17:17,334 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:17,334 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470082833] [2019-10-14 23:17:17,335 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:17,335 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:17:17,335 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573087917] [2019-10-14 23:17:17,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:17:17,336 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:17,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:17:17,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:17:17,339 INFO L87 Difference]: Start difference. First operand 132 states and 173 transitions. Second operand 5 states. [2019-10-14 23:17:17,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:17,417 INFO L93 Difference]: Finished difference Result 217 states and 287 transitions. [2019-10-14 23:17:17,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:17:17,418 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2019-10-14 23:17:17,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:17,420 INFO L225 Difference]: With dead ends: 217 [2019-10-14 23:17:17,420 INFO L226 Difference]: Without dead ends: 132 [2019-10-14 23:17:17,423 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:17:17,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-10-14 23:17:17,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2019-10-14 23:17:17,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-10-14 23:17:17,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 171 transitions. [2019-10-14 23:17:17,447 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 171 transitions. Word has length 75 [2019-10-14 23:17:17,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:17,447 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 171 transitions. [2019-10-14 23:17:17,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:17:17,448 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 171 transitions. [2019-10-14 23:17:17,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-14 23:17:17,450 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:17,450 INFO L380 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:17,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:17,664 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:17,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:17,664 INFO L82 PathProgramCache]: Analyzing trace with hash -476331621, now seen corresponding path program 2 times [2019-10-14 23:17:17,665 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:17,665 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918527859] [2019-10-14 23:17:17,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:17,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:17,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:17,683 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:17,684 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521835431] [2019-10-14 23:17:17,684 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 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 [2019-10-14 23:17:17,740 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:17,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:17,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 23:17:17,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2019-10-14 23:17:17,931 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918527859] [2019-10-14 23:17:17,931 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:17,931 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521835431] [2019-10-14 23:17:17,932 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:17,932 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:17:17,932 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916426882] [2019-10-14 23:17:17,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:17:17,934 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:17,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:17:17,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:17,935 INFO L87 Difference]: Start difference. First operand 131 states and 171 transitions. Second operand 9 states. [2019-10-14 23:17:18,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:18,233 INFO L93 Difference]: Finished difference Result 179 states and 240 transitions. [2019-10-14 23:17:18,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:17:18,234 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 91 [2019-10-14 23:17:18,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:18,237 INFO L225 Difference]: With dead ends: 179 [2019-10-14 23:17:18,237 INFO L226 Difference]: Without dead ends: 176 [2019-10-14 23:17:18,240 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:18,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-10-14 23:17:18,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 145. [2019-10-14 23:17:18,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-10-14 23:17:18,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 190 transitions. [2019-10-14 23:17:18,265 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 190 transitions. Word has length 91 [2019-10-14 23:17:18,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:18,266 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 190 transitions. [2019-10-14 23:17:18,266 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:17:18,266 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 190 transitions. [2019-10-14 23:17:18,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-14 23:17:18,268 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:18,268 INFO L380 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:18,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:18,472 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:18,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:18,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1652186987, now seen corresponding path program 3 times [2019-10-14 23:17:18,473 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:18,473 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122611960] [2019-10-14 23:17:18,473 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:18,474 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:18,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:18,480 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:18,480 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [466996956] [2019-10-14 23:17:18,480 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 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 [2019-10-14 23:17:18,522 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:17:18,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:18,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-14 23:17:18,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:18,624 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 94 proven. 34 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2019-10-14 23:17:18,658 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122611960] [2019-10-14 23:17:18,658 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:18,658 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466996956] [2019-10-14 23:17:18,658 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:18,658 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:17:18,658 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892591183] [2019-10-14 23:17:18,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:17:18,661 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:18,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:17:18,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:18,662 INFO L87 Difference]: Start difference. First operand 145 states and 190 transitions. Second operand 10 states. [2019-10-14 23:17:18,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:18,910 INFO L93 Difference]: Finished difference Result 155 states and 202 transitions. [2019-10-14 23:17:18,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:17:18,911 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 98 [2019-10-14 23:17:18,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:18,911 INFO L225 Difference]: With dead ends: 155 [2019-10-14 23:17:18,912 INFO L226 Difference]: Without dead ends: 0 [2019-10-14 23:17:18,913 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:17:18,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-14 23:17:18,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-14 23:17:18,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-14 23:17:18,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-14 23:17:18,914 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 98 [2019-10-14 23:17:18,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:18,914 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-14 23:17:18,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:17:18,914 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-14 23:17:18,914 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-14 23:17:19,117 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:19,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-14 23:17:19,691 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-10-14 23:17:19,692 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:17:19,692 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:17:19,692 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-14 23:17:19,692 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-14 23:17:19,692 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-14 23:17:19,692 INFO L439 ceAbstractionStarter]: At program point L31(line 31) the Hoare annotation is: (and (<= 1 main_~y~0) (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0) (= main_~x~0 (+ main_~b~0 (* main_~y~0 (+ (- main_~a~0) main_~q~0)) main_~r~0))) [2019-10-14 23:17:19,692 INFO L439 ceAbstractionStarter]: At program point L31-1(line 31) the Hoare annotation is: (and (<= 1 main_~y~0) (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0) (= main_~x~0 (+ main_~b~0 (* main_~y~0 (+ (- main_~a~0) main_~q~0)) main_~r~0))) [2019-10-14 23:17:19,693 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 17 58) no Hoare annotation was computed. [2019-10-14 23:17:19,693 INFO L443 ceAbstractionStarter]: For program point L56(line 56) no Hoare annotation was computed. [2019-10-14 23:17:19,693 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 17 58) no Hoare annotation was computed. [2019-10-14 23:17:19,693 INFO L443 ceAbstractionStarter]: For program point L42(lines 39 51) no Hoare annotation was computed. [2019-10-14 23:17:19,693 INFO L439 ceAbstractionStarter]: At program point L40(line 40) the Hoare annotation is: (and (<= 1 main_~y~0) (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0) (= main_~x~0 (+ main_~b~0 (* main_~y~0 (+ (- main_~a~0) main_~q~0)) main_~r~0)) (<= 1 main_~r~0)) [2019-10-14 23:17:19,693 INFO L439 ceAbstractionStarter]: At program point L40-1(line 40) the Hoare annotation is: (and (<= 1 main_~y~0) (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0) (= main_~x~0 (+ main_~b~0 (* main_~y~0 (+ (- main_~a~0) main_~q~0)) main_~r~0)) (<= 1 main_~r~0)) [2019-10-14 23:17:19,693 INFO L443 ceAbstractionStarter]: For program point L32(lines 30 54) no Hoare annotation was computed. [2019-10-14 23:17:19,694 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 17 58) the Hoare annotation is: true [2019-10-14 23:17:19,694 INFO L439 ceAbstractionStarter]: At program point L30-2(lines 30 54) the Hoare annotation is: (and (<= 1 main_~y~0) (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0) (= main_~x~0 (+ main_~b~0 (* main_~y~0 (+ (- main_~a~0) main_~q~0)) main_~r~0))) [2019-10-14 23:17:19,694 INFO L439 ceAbstractionStarter]: At program point L30-3(lines 30 54) the Hoare annotation is: (let ((.cse0 (<= 1 main_~y~0))) (or (and .cse0 (= main_~q~0 0) (= main_~x~0 main_~r~0)) (and (= main_~q~0 1) .cse0 (= main_~x~0 (+ main_~y~0 main_~r~0))) (and (= (* main_~y~0 main_~a~0) main_~b~0) .cse0 (= (+ (* 2 main_~y~0) main_~r~0) main_~x~0) (= main_~q~0 2)) (and .cse0 (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0) (<= (+ main_~r~0 1) main_~y~0) (= main_~x~0 (+ main_~b~0 (* main_~y~0 (+ (- main_~a~0) main_~q~0)) main_~r~0))))) [2019-10-14 23:17:19,694 INFO L439 ceAbstractionStarter]: At program point L47(line 47) the Hoare annotation is: (and (<= 1 main_~y~0) (<= (* 2 (* main_~y~0 main_~a~0)) main_~r~0) (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0) (= main_~x~0 (+ main_~b~0 (* main_~y~0 (+ (- main_~a~0) main_~q~0)) main_~r~0)) (<= 1 main_~r~0)) [2019-10-14 23:17:19,694 INFO L443 ceAbstractionStarter]: For program point L47-1(line 47) no Hoare annotation was computed. [2019-10-14 23:17:19,694 INFO L439 ceAbstractionStarter]: At program point L41(line 41) the Hoare annotation is: (and (<= 1 main_~y~0) (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0) (= main_~x~0 (+ main_~b~0 (* main_~y~0 (+ (- main_~a~0) main_~q~0)) main_~r~0)) (<= 1 main_~r~0)) [2019-10-14 23:17:19,695 INFO L439 ceAbstractionStarter]: At program point L39-2(lines 39 51) the Hoare annotation is: (and (<= 1 main_~y~0) (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0) (= main_~x~0 (+ main_~b~0 (* main_~y~0 (+ (- main_~a~0) main_~q~0)) main_~r~0)) (<= 1 main_~r~0)) [2019-10-14 23:17:19,695 INFO L443 ceAbstractionStarter]: For program point L39-3(lines 39 51) no Hoare annotation was computed. [2019-10-14 23:17:19,695 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2019-10-14 23:17:19,695 INFO L443 ceAbstractionStarter]: For program point L11(lines 11 12) no Hoare annotation was computed. [2019-10-14 23:17:19,695 INFO L443 ceAbstractionStarter]: For program point L10(lines 10 13) no Hoare annotation was computed. [2019-10-14 23:17:19,695 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2019-10-14 23:17:19,695 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2019-10-14 23:17:19,695 INFO L443 ceAbstractionStarter]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2019-10-14 23:17:19,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:17:19 BoogieIcfgContainer [2019-10-14 23:17:19,711 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-14 23:17:19,713 INFO L168 Benchmark]: Toolchain (without parser) took 8023.50 ms. Allocated memory was 145.2 MB in the beginning and 280.5 MB in the end (delta: 135.3 MB). Free memory was 102.7 MB in the beginning and 234.6 MB in the end (delta: -131.9 MB). Peak memory consumption was 142.8 MB. Max. memory is 7.1 GB. [2019-10-14 23:17:19,714 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.2 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-14 23:17:19,715 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.88 ms. Allocated memory is still 145.2 MB. Free memory was 102.2 MB in the beginning and 92.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-10-14 23:17:19,716 INFO L168 Benchmark]: Boogie Preprocessor took 116.84 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 92.6 MB in the beginning and 180.4 MB in the end (delta: -87.8 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2019-10-14 23:17:19,717 INFO L168 Benchmark]: RCFGBuilder took 262.36 ms. Allocated memory is still 201.9 MB. Free memory was 180.4 MB in the beginning and 167.5 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2019-10-14 23:17:19,718 INFO L168 Benchmark]: TraceAbstraction took 7383.58 ms. Allocated memory was 201.9 MB in the beginning and 280.5 MB in the end (delta: 78.6 MB). Free memory was 166.8 MB in the beginning and 234.6 MB in the end (delta: -67.8 MB). Peak memory consumption was 150.3 MB. Max. memory is 7.1 GB. [2019-10-14 23:17:19,721 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 145.2 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 251.88 ms. Allocated memory is still 145.2 MB. Free memory was 102.2 MB in the beginning and 92.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.84 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 92.6 MB in the beginning and 180.4 MB in the end (delta: -87.8 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 262.36 ms. Allocated memory is still 201.9 MB. Free memory was 180.4 MB in the beginning and 167.5 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7383.58 ms. Allocated memory was 201.9 MB in the beginning and 280.5 MB in the end (delta: 78.6 MB). Free memory was 166.8 MB in the beginning and 234.6 MB in the end (delta: -67.8 MB). Peak memory consumption was 150.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: (1 <= y && y * q + r == x) && x == b + y * (-a + q) + r - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: ((1 <= y && y * q + r == x) && x == b + y * (-a + q) + r) && 1 <= r - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 29 locations, 1 error locations. Result: SAFE, OverallTime: 7.3s, OverallIterations: 13, TraceHistogramMax: 16, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, HoareTripleCheckerStatistics: 460 SDtfs, 204 SDslu, 1358 SDs, 0 SdLazy, 1147 SolverSat, 144 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 614 GetRequests, 532 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=145occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 95 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 104 PreInvPairs, 179 NumberOfFragments, 272 HoareAnnotationTreeSize, 104 FomulaSimplifications, 6068 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 14 FomulaSimplificationsInter, 566 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 610 NumberOfCodeBlocks, 558 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 597 ConstructedInterpolants, 0 QuantifiedInterpolants, 146722 SizeOfPredicates, 41 NumberOfNonLiveVariables, 1244 ConjunctsInSsa, 186 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 1689/1763 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...