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/egcd.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:17:10,653 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:17:10,655 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:17:10,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:17:10,673 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:17:10,674 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:17:10,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:17:10,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:17:10,679 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:17:10,680 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:17:10,681 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:17:10,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:17:10,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:17:10,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:17:10,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:17:10,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:17:10,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:17:10,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:17:10,690 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:17:10,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:17:10,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:17:10,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:17:10,696 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:17:10,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:17:10,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:17:10,702 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:17:10,703 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:17:10,704 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:17:10,705 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:17:10,706 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:17:10,706 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:17:10,707 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:17:10,707 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:17:10,708 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:17:10,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:17:10,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:17:10,710 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 23:17:10,725 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:17:10,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:17:10,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:17:10,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:17:10,727 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:17:10,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:17:10,727 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:17:10,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:17:10,728 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:17:10,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:17:10,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:17:10,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:17:10,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:17:10,729 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:17:10,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:17:10,729 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:17:10,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:17:10,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:17:10,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:17:10,730 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:17:10,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:17:10,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:17:10,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:17:10,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:17:10,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:17:10,731 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:17:10,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:17:10,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:17:10,732 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:17:11,013 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:17:11,030 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:17:11,034 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:17:11,036 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:17:11,036 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:17:11,038 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd.c [2019-10-14 23:17:11,110 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/138f6d46a/b25a8e91aab5414ab28bdfa7df3097ae/FLAGe950bc4f0 [2019-10-14 23:17:11,542 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:17:11,543 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd.c [2019-10-14 23:17:11,553 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/138f6d46a/b25a8e91aab5414ab28bdfa7df3097ae/FLAGe950bc4f0 [2019-10-14 23:17:11,892 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/138f6d46a/b25a8e91aab5414ab28bdfa7df3097ae [2019-10-14 23:17:11,900 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:17:11,901 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:17:11,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:11,903 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:17:11,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:17:11,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:11" (1/1) ... [2019-10-14 23:17:11,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32777701 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 23:17:11,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:11" (1/1) ... [2019-10-14 23:17:11,918 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:17:11,939 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:17:12,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:12,128 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:17:12,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:12,163 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:17:12,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:12 WrapperNode [2019-10-14 23:17:12,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:12,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:17:12,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:17:12,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:17:12,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:12" (1/1) ... [2019-10-14 23:17:12,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:12" (1/1) ... [2019-10-14 23:17:12,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:12" (1/1) ... [2019-10-14 23:17:12,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:12" (1/1) ... [2019-10-14 23:17:12,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:12" (1/1) ... [2019-10-14 23:17:12,284 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:12" (1/1) ... [2019-10-14 23:17:12,285 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:12" (1/1) ... [2019-10-14 23:17:12,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:17:12,287 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:17:12,287 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:17:12,288 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:17:12,288 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:12" (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 23:17:12,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:17:12,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:17:12,347 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:17:12,347 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:17:12,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:17:12,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:17:12,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:17:12,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:17:12,348 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:17:12,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:17:12,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:17:12,561 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:17:12,562 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:17:12,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:12 BoogieIcfgContainer [2019-10-14 23:17:12,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:17:12,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:17:12,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:17:12,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:17:12,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:17:11" (1/3) ... [2019-10-14 23:17:12,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7391afae 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 23:17:12,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:12" (2/3) ... [2019-10-14 23:17:12,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7391afae 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 23:17:12,580 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 23:17:12,582 INFO L109 eAbstractionObserver]: Analyzing ICFG egcd.c [2019-10-14 23:17:12,596 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:17:12,615 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:17:12,640 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:17:12,679 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:17:12,680 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:17:12,680 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:17:12,680 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:17:12,680 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:17:12,681 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:17:12,681 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:17:12,681 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:17:12,697 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-10-14 23:17:12,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:17:12,702 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:12,703 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:12,704 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:12,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:12,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1589353370, now seen corresponding path program 1 times [2019-10-14 23:17:12,718 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:12,718 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379466720] [2019-10-14 23:17:12,718 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:12,719 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:12,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:12,831 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 23:17:12,831 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379466720] [2019-10-14 23:17:12,832 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:12,832 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:17:12,833 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819493004] [2019-10-14 23:17:12,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:17:12,837 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:12,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:17:12,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:17:12,850 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-10-14 23:17:12,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:12,875 INFO L93 Difference]: Finished difference Result 47 states and 74 transitions. [2019-10-14 23:17:12,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:17:12,877 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-14 23:17:12,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:12,887 INFO L225 Difference]: With dead ends: 47 [2019-10-14 23:17:12,888 INFO L226 Difference]: Without dead ends: 21 [2019-10-14 23:17:12,892 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 23:17:12,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-14 23:17:12,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-14 23:17:12,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-14 23:17:12,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2019-10-14 23:17:12,941 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 10 [2019-10-14 23:17:12,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:12,942 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2019-10-14 23:17:12,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:17:12,942 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2019-10-14 23:17:12,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:17:12,943 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:12,943 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:12,943 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:12,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:12,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1587685074, now seen corresponding path program 1 times [2019-10-14 23:17:12,944 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:12,944 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620751077] [2019-10-14 23:17:12,945 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:12,945 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:12,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:12,956 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:12,957 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434681800] [2019-10-14 23:17:12,957 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 23:17:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:13,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:17:13,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:13,152 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 23:17:13,154 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620751077] [2019-10-14 23:17:13,154 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:13,154 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434681800] [2019-10-14 23:17:13,155 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:13,155 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:17:13,155 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152549495] [2019-10-14 23:17:13,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:17:13,158 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:13,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:17:13,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:17:13,159 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand 5 states. [2019-10-14 23:17:13,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:13,283 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2019-10-14 23:17:13,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:17:13,284 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-14 23:17:13,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:13,286 INFO L225 Difference]: With dead ends: 37 [2019-10-14 23:17:13,287 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 23:17:13,288 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 23:17:13,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 23:17:13,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-14 23:17:13,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 23:17:13,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2019-10-14 23:17:13,305 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 10 [2019-10-14 23:17:13,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:13,305 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2019-10-14 23:17:13,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:17:13,306 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2019-10-14 23:17:13,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 23:17:13,306 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:13,307 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:13,511 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:13,515 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:13,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:13,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1592529048, now seen corresponding path program 1 times [2019-10-14 23:17:13,516 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:13,516 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218244485] [2019-10-14 23:17:13,516 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:13,517 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:13,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:13,530 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:13,530 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1753184038] [2019-10-14 23:17:13,530 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 23:17:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:13,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:17:13,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:13,635 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 23:17:13,637 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218244485] [2019-10-14 23:17:13,638 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:13,638 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753184038] [2019-10-14 23:17:13,638 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:13,638 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:17:13,639 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183378117] [2019-10-14 23:17:13,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:17:13,640 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:13,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:17:13,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:17:13,641 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand 5 states. [2019-10-14 23:17:13,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:13,721 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2019-10-14 23:17:13,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:17:13,722 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-10-14 23:17:13,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:13,723 INFO L225 Difference]: With dead ends: 41 [2019-10-14 23:17:13,723 INFO L226 Difference]: Without dead ends: 39 [2019-10-14 23:17:13,724 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 23:17:13,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-14 23:17:13,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-10-14 23:17:13,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 23:17:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2019-10-14 23:17:13,735 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 15 [2019-10-14 23:17:13,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:13,736 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2019-10-14 23:17:13,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:17:13,736 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2019-10-14 23:17:13,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 23:17:13,738 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:13,738 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:13,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:13,942 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:13,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:13,943 INFO L82 PathProgramCache]: Analyzing trace with hash 2040988462, now seen corresponding path program 1 times [2019-10-14 23:17:13,943 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:13,944 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991099173] [2019-10-14 23:17:13,944 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:13,944 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:13,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:13,953 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:13,953 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492852986] [2019-10-14 23:17:13,953 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 23:17:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:13,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:17:13,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:14,030 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 23:17:14,031 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991099173] [2019-10-14 23:17:14,031 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:14,031 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492852986] [2019-10-14 23:17:14,032 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:14,032 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:17:14,032 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066223450] [2019-10-14 23:17:14,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:17:14,035 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:14,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:17:14,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:17:14,036 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand 5 states. [2019-10-14 23:17:14,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:14,141 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2019-10-14 23:17:14,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:17:14,144 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-10-14 23:17:14,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:14,149 INFO L225 Difference]: With dead ends: 63 [2019-10-14 23:17:14,149 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 23:17:14,150 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 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 23:17:14,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 23:17:14,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-10-14 23:17:14,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-14 23:17:14,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 84 transitions. [2019-10-14 23:17:14,171 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 84 transitions. Word has length 20 [2019-10-14 23:17:14,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:14,171 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 84 transitions. [2019-10-14 23:17:14,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:17:14,171 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 84 transitions. [2019-10-14 23:17:14,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 23:17:14,172 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:14,173 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:14,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:14,382 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:14,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:14,383 INFO L82 PathProgramCache]: Analyzing trace with hash 113727669, now seen corresponding path program 1 times [2019-10-14 23:17:14,384 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:14,384 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818843909] [2019-10-14 23:17:14,385 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:14,385 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:14,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:14,406 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:14,407 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151591428] [2019-10-14 23:17:14,407 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 23:17:14,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:14,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:17:14,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:14,476 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:17:14,477 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818843909] [2019-10-14 23:17:14,477 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:14,477 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151591428] [2019-10-14 23:17:14,477 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:14,478 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:17:14,478 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539947073] [2019-10-14 23:17:14,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:17:14,478 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:14,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:17:14,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:17:14,479 INFO L87 Difference]: Start difference. First operand 59 states and 84 transitions. Second operand 5 states. [2019-10-14 23:17:14,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:14,542 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2019-10-14 23:17:14,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:17:14,543 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2019-10-14 23:17:14,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:14,544 INFO L225 Difference]: With dead ends: 65 [2019-10-14 23:17:14,545 INFO L226 Difference]: Without dead ends: 63 [2019-10-14 23:17:14,547 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 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 23:17:14,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-14 23:17:14,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-10-14 23:17:14,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-14 23:17:14,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 87 transitions. [2019-10-14 23:17:14,577 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 87 transitions. Word has length 26 [2019-10-14 23:17:14,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:14,577 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 87 transitions. [2019-10-14 23:17:14,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:17:14,578 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 87 transitions. [2019-10-14 23:17:14,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:17:14,581 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:14,582 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:14,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:14,794 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:14,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:14,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1597054094, now seen corresponding path program 1 times [2019-10-14 23:17:14,796 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:14,796 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319372634] [2019-10-14 23:17:14,796 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:14,797 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:14,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:14,804 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:14,804 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928284801] [2019-10-14 23:17:14,805 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 23:17:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:14,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:17:14,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:14,893 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 23:17:14,894 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319372634] [2019-10-14 23:17:14,894 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:14,894 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928284801] [2019-10-14 23:17:14,894 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:14,895 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:17:14,895 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414557261] [2019-10-14 23:17:14,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:17:14,897 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:14,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:17:14,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:17:14,897 INFO L87 Difference]: Start difference. First operand 63 states and 87 transitions. Second operand 5 states. [2019-10-14 23:17:14,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:14,960 INFO L93 Difference]: Finished difference Result 73 states and 95 transitions. [2019-10-14 23:17:14,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:17:14,960 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-10-14 23:17:14,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:14,962 INFO L225 Difference]: With dead ends: 73 [2019-10-14 23:17:14,962 INFO L226 Difference]: Without dead ends: 70 [2019-10-14 23:17:14,963 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 1 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 23:17:14,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-14 23:17:14,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2019-10-14 23:17:14,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-14 23:17:14,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2019-10-14 23:17:14,976 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 28 [2019-10-14 23:17:14,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:14,976 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2019-10-14 23:17:14,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:17:14,976 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2019-10-14 23:17:14,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 23:17:14,977 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:14,978 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] [2019-10-14 23:17:15,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:15,181 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:15,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:15,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1857063759, now seen corresponding path program 1 times [2019-10-14 23:17:15,182 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:15,182 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629140229] [2019-10-14 23:17:15,183 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:15,183 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:15,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:15,190 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:15,190 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62250498] [2019-10-14 23:17:15,190 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 23:17:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:15,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:17:15,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:15,295 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 23:17:15,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629140229] [2019-10-14 23:17:15,295 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:15,296 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62250498] [2019-10-14 23:17:15,296 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:15,296 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:17:15,296 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962299466] [2019-10-14 23:17:15,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:17:15,297 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:15,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:17:15,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:17:15,298 INFO L87 Difference]: Start difference. First operand 68 states and 88 transitions. Second operand 6 states. [2019-10-14 23:17:15,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:15,419 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2019-10-14 23:17:15,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:17:15,420 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2019-10-14 23:17:15,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:15,421 INFO L225 Difference]: With dead ends: 81 [2019-10-14 23:17:15,422 INFO L226 Difference]: Without dead ends: 77 [2019-10-14 23:17:15,422 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 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 23:17:15,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-14 23:17:15,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2019-10-14 23:17:15,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-10-14 23:17:15,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2019-10-14 23:17:15,435 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 31 [2019-10-14 23:17:15,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:15,436 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2019-10-14 23:17:15,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:17:15,436 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2019-10-14 23:17:15,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 23:17:15,437 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:15,437 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:15,641 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:15,641 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:15,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:15,641 INFO L82 PathProgramCache]: Analyzing trace with hash -493170476, now seen corresponding path program 2 times [2019-10-14 23:17:15,642 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:15,642 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163150028] [2019-10-14 23:17:15,642 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:15,642 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:15,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:15,648 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:15,649 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585055857] [2019-10-14 23:17:15,649 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 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 23:17:15,689 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:15,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:15,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 23:17:15,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:15,755 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 23:17:15,756 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163150028] [2019-10-14 23:17:15,756 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:15,756 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585055857] [2019-10-14 23:17:15,756 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:15,757 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 23:17:15,757 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69669647] [2019-10-14 23:17:15,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:17:15,757 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:15,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:17:15,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:17:15,758 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand 6 states. [2019-10-14 23:17:15,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:15,897 INFO L93 Difference]: Finished difference Result 108 states and 136 transitions. [2019-10-14 23:17:15,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:17:15,898 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2019-10-14 23:17:15,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:15,901 INFO L225 Difference]: With dead ends: 108 [2019-10-14 23:17:15,902 INFO L226 Difference]: Without dead ends: 106 [2019-10-14 23:17:15,903 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:15,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-14 23:17:15,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2019-10-14 23:17:15,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-10-14 23:17:15,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2019-10-14 23:17:15,920 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 33 [2019-10-14 23:17:15,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:15,920 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2019-10-14 23:17:15,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:17:15,920 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2019-10-14 23:17:15,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 23:17:15,922 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:15,922 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:16,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:16,135 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:16,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:16,136 INFO L82 PathProgramCache]: Analyzing trace with hash -558447568, now seen corresponding path program 1 times [2019-10-14 23:17:16,136 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:16,137 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299188143] [2019-10-14 23:17:16,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:16,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:16,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:16,147 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:16,150 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359286143] [2019-10-14 23:17:16,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:17:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:16,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 23:17:16,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-14 23:17:16,280 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299188143] [2019-10-14 23:17:16,281 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:16,281 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359286143] [2019-10-14 23:17:16,282 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:16,282 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 23:17:16,282 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308744987] [2019-10-14 23:17:16,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:17:16,284 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:16,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:17:16,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:17:16,284 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand 6 states. [2019-10-14 23:17:16,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:16,421 INFO L93 Difference]: Finished difference Result 125 states and 164 transitions. [2019-10-14 23:17:16,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:17:16,424 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2019-10-14 23:17:16,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:16,425 INFO L225 Difference]: With dead ends: 125 [2019-10-14 23:17:16,426 INFO L226 Difference]: Without dead ends: 119 [2019-10-14 23:17:16,426 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:16,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-10-14 23:17:16,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2019-10-14 23:17:16,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-10-14 23:17:16,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 153 transitions. [2019-10-14 23:17:16,462 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 153 transitions. Word has length 38 [2019-10-14 23:17:16,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:16,462 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 153 transitions. [2019-10-14 23:17:16,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:17:16,464 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 153 transitions. [2019-10-14 23:17:16,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 23:17:16,465 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:16,466 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:16,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:16,669 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:16,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:16,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1383929332, now seen corresponding path program 1 times [2019-10-14 23:17:16,670 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:16,671 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670621464] [2019-10-14 23:17:16,671 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:16,671 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:16,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:16,684 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:16,684 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658695255] [2019-10-14 23:17:16,684 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 23:17:16,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:16,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:17:16,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 23:17:16,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670621464] [2019-10-14 23:17:16,792 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:16,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658695255] [2019-10-14 23:17:16,793 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:16,793 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:17:16,793 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621086787] [2019-10-14 23:17:16,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:17:16,794 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:16,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:17:16,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:16,794 INFO L87 Difference]: Start difference. First operand 119 states and 153 transitions. Second operand 7 states. [2019-10-14 23:17:16,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:16,962 INFO L93 Difference]: Finished difference Result 141 states and 182 transitions. [2019-10-14 23:17:16,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:17:16,964 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2019-10-14 23:17:16,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:16,966 INFO L225 Difference]: With dead ends: 141 [2019-10-14 23:17:16,966 INFO L226 Difference]: Without dead ends: 139 [2019-10-14 23:17:16,970 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:16,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-10-14 23:17:16,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2019-10-14 23:17:16,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-10-14 23:17:16,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 174 transitions. [2019-10-14 23:17:16,994 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 174 transitions. Word has length 46 [2019-10-14 23:17:16,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:16,997 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 174 transitions. [2019-10-14 23:17:16,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:17:16,997 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 174 transitions. [2019-10-14 23:17:17,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 23:17:17,001 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:17,001 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:17,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:17,209 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:17,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:17,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1192657524, now seen corresponding path program 2 times [2019-10-14 23:17:17,210 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:17,210 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105671976] [2019-10-14 23:17:17,211 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:17,211 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:17,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:17,219 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:17,220 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408239120] [2019-10-14 23:17:17,220 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 23:17:17,269 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:17,269 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:17,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:17:17,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 23:17:17,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105671976] [2019-10-14 23:17:17,337 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:17,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408239120] [2019-10-14 23:17:17,338 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:17,338 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:17:17,338 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590766770] [2019-10-14 23:17:17,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:17:17,339 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:17,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:17:17,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:17,339 INFO L87 Difference]: Start difference. First operand 135 states and 174 transitions. Second operand 7 states. [2019-10-14 23:17:17,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:17,481 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2019-10-14 23:17:17,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:17:17,484 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2019-10-14 23:17:17,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:17,486 INFO L225 Difference]: With dead ends: 154 [2019-10-14 23:17:17,487 INFO L226 Difference]: Without dead ends: 151 [2019-10-14 23:17:17,487 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:17,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-10-14 23:17:17,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2019-10-14 23:17:17,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-10-14 23:17:17,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 189 transitions. [2019-10-14 23:17:17,504 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 189 transitions. Word has length 46 [2019-10-14 23:17:17,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:17,504 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 189 transitions. [2019-10-14 23:17:17,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:17:17,505 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 189 transitions. [2019-10-14 23:17:17,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 23:17:17,506 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:17,506 INFO L380 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:17,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:17,711 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:17,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:17,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1196309741, now seen corresponding path program 1 times [2019-10-14 23:17:17,712 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:17,712 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960585241] [2019-10-14 23:17:17,712 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:17,713 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:17,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:17,728 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:17,728 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1245212270] [2019-10-14 23:17:17,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:17:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:17,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 23:17:17,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:17,842 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-14 23:17:17,872 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960585241] [2019-10-14 23:17:17,873 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:17,873 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245212270] [2019-10-14 23:17:17,873 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:17,873 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:17:17,874 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722439083] [2019-10-14 23:17:17,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:17:17,875 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:17,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:17:17,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:17,875 INFO L87 Difference]: Start difference. First operand 148 states and 189 transitions. Second operand 9 states. [2019-10-14 23:17:18,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:18,076 INFO L93 Difference]: Finished difference Result 161 states and 202 transitions. [2019-10-14 23:17:18,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:17:18,080 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2019-10-14 23:17:18,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:18,082 INFO L225 Difference]: With dead ends: 161 [2019-10-14 23:17:18,084 INFO L226 Difference]: Without dead ends: 157 [2019-10-14 23:17:18,086 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:17:18,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-10-14 23:17:18,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-10-14 23:17:18,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-10-14 23:17:18,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 194 transitions. [2019-10-14 23:17:18,113 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 194 transitions. Word has length 49 [2019-10-14 23:17:18,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:18,114 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 194 transitions. [2019-10-14 23:17:18,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:17:18,114 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 194 transitions. [2019-10-14 23:17:18,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 23:17:18,117 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:18,117 INFO L380 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:18,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:18,331 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:18,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:18,332 INFO L82 PathProgramCache]: Analyzing trace with hash 336099856, now seen corresponding path program 3 times [2019-10-14 23:17:18,333 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:18,333 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565863873] [2019-10-14 23:17:18,333 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:18,333 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:18,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:18,339 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:18,340 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799104026] [2019-10-14 23:17:18,340 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 23:17:18,405 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 23:17:18,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:18,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-14 23:17:18,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:18,569 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-10-14 23:17:18,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565863873] [2019-10-14 23:17:18,570 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:18,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799104026] [2019-10-14 23:17:18,570 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:18,570 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:17:18,570 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743076493] [2019-10-14 23:17:18,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:17:18,571 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:18,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:17:18,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:18,572 INFO L87 Difference]: Start difference. First operand 157 states and 194 transitions. Second operand 7 states. [2019-10-14 23:17:18,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:18,738 INFO L93 Difference]: Finished difference Result 187 states and 233 transitions. [2019-10-14 23:17:18,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:17:18,739 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2019-10-14 23:17:18,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:18,741 INFO L225 Difference]: With dead ends: 187 [2019-10-14 23:17:18,741 INFO L226 Difference]: Without dead ends: 185 [2019-10-14 23:17:18,744 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:18,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-10-14 23:17:18,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 181. [2019-10-14 23:17:18,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-10-14 23:17:18,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 224 transitions. [2019-10-14 23:17:18,763 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 224 transitions. Word has length 51 [2019-10-14 23:17:18,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:18,764 INFO L462 AbstractCegarLoop]: Abstraction has 181 states and 224 transitions. [2019-10-14 23:17:18,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:17:18,764 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 224 transitions. [2019-10-14 23:17:18,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 23:17:18,765 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:18,765 INFO L380 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:18,969 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:18,970 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:18,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:18,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1722303250, now seen corresponding path program 3 times [2019-10-14 23:17:18,970 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:18,970 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789370921] [2019-10-14 23:17:18,971 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:18,971 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:18,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:18,977 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:18,979 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243071212] [2019-10-14 23:17:18,982 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:19,011 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 23:17:19,012 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:19,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-14 23:17:19,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-10-14 23:17:19,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789370921] [2019-10-14 23:17:19,170 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:19,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243071212] [2019-10-14 23:17:19,170 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:19,170 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:17:19,171 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138177601] [2019-10-14 23:17:19,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:17:19,171 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:19,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:17:19,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:19,172 INFO L87 Difference]: Start difference. First operand 181 states and 224 transitions. Second operand 7 states. [2019-10-14 23:17:19,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:19,348 INFO L93 Difference]: Finished difference Result 210 states and 258 transitions. [2019-10-14 23:17:19,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:17:19,349 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2019-10-14 23:17:19,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:19,351 INFO L225 Difference]: With dead ends: 210 [2019-10-14 23:17:19,351 INFO L226 Difference]: Without dead ends: 208 [2019-10-14 23:17:19,352 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:19,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-10-14 23:17:19,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 194. [2019-10-14 23:17:19,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-10-14 23:17:19,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 235 transitions. [2019-10-14 23:17:19,371 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 235 transitions. Word has length 51 [2019-10-14 23:17:19,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:19,371 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 235 transitions. [2019-10-14 23:17:19,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:17:19,371 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 235 transitions. [2019-10-14 23:17:19,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 23:17:19,372 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:19,373 INFO L380 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:19,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:19,586 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:19,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:19,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1389199476, now seen corresponding path program 4 times [2019-10-14 23:17:19,587 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:19,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940655971] [2019-10-14 23:17:19,587 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:19,587 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:19,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:19,604 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:19,605 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399475242] [2019-10-14 23:17:19,605 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:19,656 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:17:19,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:19,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-14 23:17:19,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:21,914 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:21,960 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 27 proven. 48 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 23:17:21,960 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940655971] [2019-10-14 23:17:21,960 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:21,960 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399475242] [2019-10-14 23:17:21,961 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:21,961 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-14 23:17:21,961 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391818021] [2019-10-14 23:17:21,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:17:21,962 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:21,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:17:21,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=84, Unknown=1, NotChecked=0, Total=110 [2019-10-14 23:17:21,964 INFO L87 Difference]: Start difference. First operand 194 states and 235 transitions. Second operand 11 states. [2019-10-14 23:17:23,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:23,360 INFO L93 Difference]: Finished difference Result 198 states and 238 transitions. [2019-10-14 23:17:23,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:17:23,361 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2019-10-14 23:17:23,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:23,361 INFO L225 Difference]: With dead ends: 198 [2019-10-14 23:17:23,362 INFO L226 Difference]: Without dead ends: 0 [2019-10-14 23:17:23,366 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=43, Invalid=138, Unknown=1, NotChecked=0, Total=182 [2019-10-14 23:17:23,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-14 23:17:23,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-14 23:17:23,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-14 23:17:23,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-14 23:17:23,367 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2019-10-14 23:17:23,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:23,368 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-14 23:17:23,368 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:17:23,371 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-14 23:17:23,371 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-14 23:17:23,575 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:23,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-14 23:17:30,213 WARN L191 SmtUtils]: Spent 6.34 s on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2019-10-14 23:17:34,595 WARN L191 SmtUtils]: Spent 4.38 s on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2019-10-14 23:17:51,093 WARN L191 SmtUtils]: Spent 16.50 s on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2019-10-14 23:18:02,301 WARN L191 SmtUtils]: Spent 11.21 s on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2019-10-14 23:18:02,389 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-10-14 23:18:02,389 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:18:02,389 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:18:02,389 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-14 23:18:02,389 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-14 23:18:02,389 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-14 23:18:02,389 INFO L443 ceAbstractionStarter]: For program point L31(lines 28 45) no Hoare annotation was computed. [2019-10-14 23:18:02,389 INFO L439 ceAbstractionStarter]: At program point L29(line 29) the Hoare annotation is: (let ((.cse3 (+ main_~p~0 main_~q~0)) (.cse2 (+ main_~r~0 main_~s~0))) (and (exists ((main_~p~0 Int) (main_~r~0 Int)) (let ((.cse0 (+ (* main_~r~0 2) main_~s~0)) (.cse1 (+ (* main_~p~0 2) main_~q~0))) (and (= (+ (* 2 (* main_~x~0 main_~p~0)) main_~b~0 (* 2 (* main_~y~0 main_~r~0))) (+ (* main_~y~0 .cse0) (* main_~x~0 .cse1))) (= (+ (* .cse0 (+ main_~p~0 main_~q~0)) 1) (* .cse1 (+ main_~r~0 main_~s~0)))))) (= (+ (* main_~y~0 .cse2) (* main_~x~0 .cse3)) (+ main_~a~0 main_~b~0)) (= (* .cse3 main_~s~0) (+ (* .cse2 main_~q~0) 1)) (<= 1 main_~x~0))) [2019-10-14 23:18:02,390 INFO L439 ceAbstractionStarter]: At program point L29-1(line 29) the Hoare annotation is: (let ((.cse3 (+ main_~p~0 main_~q~0)) (.cse2 (+ main_~r~0 main_~s~0))) (and (exists ((main_~p~0 Int) (main_~r~0 Int)) (let ((.cse0 (+ (* main_~r~0 2) main_~s~0)) (.cse1 (+ (* main_~p~0 2) main_~q~0))) (and (= (+ (* 2 (* main_~x~0 main_~p~0)) main_~b~0 (* 2 (* main_~y~0 main_~r~0))) (+ (* main_~y~0 .cse0) (* main_~x~0 .cse1))) (= (+ (* .cse0 (+ main_~p~0 main_~q~0)) 1) (* .cse1 (+ main_~r~0 main_~s~0)))))) (= (+ (* main_~y~0 .cse2) (* main_~x~0 .cse3)) (+ main_~a~0 main_~b~0)) (= (* .cse3 main_~s~0) (+ (* .cse2 main_~q~0) 1)) (<= 1 main_~x~0))) [2019-10-14 23:18:02,390 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 13 52) no Hoare annotation was computed. [2019-10-14 23:18:02,390 INFO L443 ceAbstractionStarter]: For program point L50(line 50) no Hoare annotation was computed. [2019-10-14 23:18:02,390 INFO L439 ceAbstractionStarter]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (= main_~s~0 1)) (.cse1 (= main_~p~0 1)) (.cse2 (= main_~b~0 main_~y~0)) (.cse5 (= main_~q~0 0)) (.cse3 (= main_~b~0 main_~a~0)) (.cse6 (+ main_~p~0 main_~q~0)) (.cse4 (<= 1 main_~x~0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5) (and .cse0 (= .cse6 1) .cse3 (= (+ main_~q~0 1) 0) .cse4 (= main_~y~0 (+ main_~x~0 main_~b~0)) (= (+ main_~r~0 (* 2 main_~s~0)) 1)) (and (= main_~r~0 0) .cse0 .cse1 .cse2 .cse4 .cse5 (= main_~a~0 main_~x~0)) (let ((.cse7 (+ main_~r~0 main_~s~0))) (and (= main_~a~0 (+ (* main_~x~0 main_~p~0) (* main_~y~0 main_~r~0))) .cse3 (= (+ (* main_~y~0 .cse7) (* main_~x~0 .cse6)) (+ main_~a~0 main_~b~0)) (= (* .cse6 main_~s~0) (+ (* .cse7 main_~q~0) 1)) .cse4)))) [2019-10-14 23:18:02,390 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 13 52) no Hoare annotation was computed. [2019-10-14 23:18:02,390 INFO L443 ceAbstractionStarter]: For program point L36(lines 36 44) no Hoare annotation was computed. [2019-10-14 23:18:02,390 INFO L439 ceAbstractionStarter]: At program point L36-2(lines 28 45) the Hoare annotation is: (let ((.cse3 (+ main_~p~0 main_~q~0)) (.cse2 (+ main_~r~0 main_~s~0))) (and (exists ((main_~p~0 Int) (main_~r~0 Int)) (let ((.cse0 (+ (* main_~r~0 2) main_~s~0)) (.cse1 (+ (* main_~p~0 2) main_~q~0))) (and (= (+ (* 2 (* main_~x~0 main_~p~0)) main_~b~0 (* 2 (* main_~y~0 main_~r~0))) (+ (* main_~y~0 .cse0) (* main_~x~0 .cse1))) (= (+ (* .cse0 (+ main_~p~0 main_~q~0)) 1) (* .cse1 (+ main_~r~0 main_~s~0)))))) (= (+ (* main_~y~0 .cse2) (* main_~x~0 .cse3)) (+ main_~a~0 main_~b~0)) (= (* .cse3 main_~s~0) (+ (* .cse2 main_~q~0) 1)) (<= 1 main_~x~0))) [2019-10-14 23:18:02,391 INFO L439 ceAbstractionStarter]: At program point L30(line 30) the Hoare annotation is: (let ((.cse3 (+ main_~p~0 main_~q~0)) (.cse2 (+ main_~r~0 main_~s~0))) (and (exists ((main_~p~0 Int) (main_~r~0 Int)) (let ((.cse0 (+ (* main_~r~0 2) main_~s~0)) (.cse1 (+ (* main_~p~0 2) main_~q~0))) (and (= (+ (* 2 (* main_~x~0 main_~p~0)) main_~b~0 (* 2 (* main_~y~0 main_~r~0))) (+ (* main_~y~0 .cse0) (* main_~x~0 .cse1))) (= (+ (* .cse0 (+ main_~p~0 main_~q~0)) 1) (* .cse1 (+ main_~r~0 main_~s~0)))))) (= (+ (* main_~y~0 .cse2) (* main_~x~0 .cse3)) (+ main_~a~0 main_~b~0)) (= (* .cse3 main_~s~0) (+ (* .cse2 main_~q~0) 1)) (<= 1 main_~x~0))) [2019-10-14 23:18:02,391 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 13 52) the Hoare annotation is: true [2019-10-14 23:18:02,391 INFO L439 ceAbstractionStarter]: At program point L28-2(lines 28 45) the Hoare annotation is: (let ((.cse3 (+ main_~p~0 main_~q~0)) (.cse2 (+ main_~r~0 main_~s~0))) (and (exists ((main_~p~0 Int) (main_~r~0 Int)) (let ((.cse0 (+ (* main_~r~0 2) main_~s~0)) (.cse1 (+ (* main_~p~0 2) main_~q~0))) (and (= (+ (* 2 (* main_~x~0 main_~p~0)) main_~b~0 (* 2 (* main_~y~0 main_~r~0))) (+ (* main_~y~0 .cse0) (* main_~x~0 .cse1))) (= (+ (* .cse0 (+ main_~p~0 main_~q~0)) 1) (* .cse1 (+ main_~r~0 main_~s~0)))))) (= main_~b~0 main_~a~0) (= (+ (* main_~y~0 .cse2) (* main_~x~0 .cse3)) (+ main_~a~0 main_~b~0)) (= (* .cse3 main_~s~0) (+ (* .cse2 main_~q~0) 1)) (<= 1 main_~x~0))) [2019-10-14 23:18:02,391 INFO L439 ceAbstractionStarter]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (= main_~s~0 1)) (.cse2 (= main_~b~0 main_~a~0)) (.cse1 (<= 1 main_~x~0))) (or (and .cse0 (= main_~b~0 main_~y~0) .cse1 (= main_~q~0 0)) (and .cse0 .cse2 (= (+ main_~q~0 1) 0) .cse1 (= main_~y~0 (+ main_~x~0 main_~b~0))) (let ((.cse6 (+ main_~p~0 main_~q~0)) (.cse5 (+ main_~r~0 main_~s~0))) (and (exists ((main_~p~0 Int) (main_~r~0 Int)) (let ((.cse3 (+ (* main_~r~0 2) main_~s~0)) (.cse4 (+ (* main_~p~0 2) main_~q~0))) (and (= (+ (* 2 (* main_~x~0 main_~p~0)) main_~b~0 (* 2 (* main_~y~0 main_~r~0))) (+ (* main_~y~0 .cse3) (* main_~x~0 .cse4))) (= (+ (* .cse3 (+ main_~p~0 main_~q~0)) 1) (* .cse4 (+ main_~r~0 main_~s~0)))))) .cse2 (= (+ (* main_~y~0 .cse5) (* main_~x~0 .cse6)) (+ main_~a~0 main_~b~0)) (= (* .cse6 main_~s~0) (+ (* .cse5 main_~q~0) 1)) .cse1)))) [2019-10-14 23:18:02,392 INFO L439 ceAbstractionStarter]: At program point L47(line 47) the Hoare annotation is: (let ((.cse3 (+ main_~p~0 main_~q~0)) (.cse2 (+ main_~r~0 main_~s~0))) (and (exists ((main_~p~0 Int) (main_~r~0 Int)) (let ((.cse0 (+ (* main_~r~0 2) main_~s~0)) (.cse1 (+ (* main_~p~0 2) main_~q~0))) (and (= (+ (* 2 (* main_~x~0 main_~p~0)) main_~b~0 (* 2 (* main_~y~0 main_~r~0))) (+ (* main_~y~0 .cse0) (* main_~x~0 .cse1))) (= (+ (* .cse0 (+ main_~p~0 main_~q~0)) 1) (* .cse1 (+ main_~r~0 main_~s~0)))))) (= main_~b~0 main_~a~0) (= (+ (* main_~y~0 .cse2) (* main_~x~0 .cse3)) (+ main_~a~0 main_~b~0)) (= (* .cse3 main_~s~0) (+ (* .cse2 main_~q~0) 1)) (<= 1 main_~x~0))) [2019-10-14 23:18:02,392 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 5 11) the Hoare annotation is: true [2019-10-14 23:18:02,392 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 5 11) no Hoare annotation was computed. [2019-10-14 23:18:02,392 INFO L443 ceAbstractionStarter]: For program point L7(lines 7 8) no Hoare annotation was computed. [2019-10-14 23:18:02,392 INFO L443 ceAbstractionStarter]: For program point L6(lines 6 9) no Hoare annotation was computed. [2019-10-14 23:18:02,392 INFO L443 ceAbstractionStarter]: For program point L6-2(lines 5 11) no Hoare annotation was computed. [2019-10-14 23:18:02,393 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2019-10-14 23:18:02,400 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~p~0,QUANTIFIED] [2019-10-14 23:18:02,401 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~r~0,QUANTIFIED] [2019-10-14 23:18:02,401 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~r~0,QUANTIFIED] [2019-10-14 23:18:02,401 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~p~0,QUANTIFIED] [2019-10-14 23:18:02,402 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~r~0,QUANTIFIED] [2019-10-14 23:18:02,402 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~p~0,QUANTIFIED] [2019-10-14 23:18:02,402 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~p~0,QUANTIFIED] [2019-10-14 23:18:02,402 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~r~0,QUANTIFIED] [2019-10-14 23:18:02,417 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~p~0,QUANTIFIED] [2019-10-14 23:18:02,419 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~r~0,QUANTIFIED] [2019-10-14 23:18:02,419 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~r~0,QUANTIFIED] [2019-10-14 23:18:02,419 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~p~0,QUANTIFIED] [2019-10-14 23:18:02,420 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~r~0,QUANTIFIED] [2019-10-14 23:18:02,420 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~p~0,QUANTIFIED] [2019-10-14 23:18:02,420 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~p~0,QUANTIFIED] [2019-10-14 23:18:02,420 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~r~0,QUANTIFIED] [2019-10-14 23:18:02,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:18:02 BoogieIcfgContainer [2019-10-14 23:18:02,426 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-14 23:18:02,428 INFO L168 Benchmark]: Toolchain (without parser) took 50526.53 ms. Allocated memory was 144.7 MB in the beginning and 276.3 MB in the end (delta: 131.6 MB). Free memory was 101.2 MB in the beginning and 222.2 MB in the end (delta: -121.0 MB). Peak memory consumption was 138.6 MB. Max. memory is 7.1 GB. [2019-10-14 23:18:02,429 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 144.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-10-14 23:18:02,430 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.17 ms. Allocated memory is still 144.7 MB. Free memory was 101.0 MB in the beginning and 91.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2019-10-14 23:18:02,435 INFO L168 Benchmark]: Boogie Preprocessor took 123.16 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 91.3 MB in the beginning and 180.1 MB in the end (delta: -88.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2019-10-14 23:18:02,435 INFO L168 Benchmark]: RCFGBuilder took 281.14 ms. Allocated memory is still 201.9 MB. Free memory was 180.1 MB in the beginning and 167.3 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2019-10-14 23:18:02,439 INFO L168 Benchmark]: TraceAbstraction took 49854.95 ms. Allocated memory was 201.9 MB in the beginning and 276.3 MB in the end (delta: 74.4 MB). Free memory was 167.3 MB in the beginning and 222.2 MB in the end (delta: -54.9 MB). Peak memory consumption was 147.5 MB. Max. memory is 7.1 GB. [2019-10-14 23:18:02,443 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 144.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 261.17 ms. Allocated memory is still 144.7 MB. Free memory was 101.0 MB in the beginning and 91.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.16 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 91.3 MB in the beginning and 180.1 MB in the end (delta: -88.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 281.14 ms. Allocated memory is still 201.9 MB. Free memory was 180.1 MB in the beginning and 167.3 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 49854.95 ms. Allocated memory was 201.9 MB in the beginning and 276.3 MB in the end (delta: 74.4 MB). Free memory was 167.3 MB in the beginning and 222.2 MB in the end (delta: -54.9 MB). Peak memory consumption was 147.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~p~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~r~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~r~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~p~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~r~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~p~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~p~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~r~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~p~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~r~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~r~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~p~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~r~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~p~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~p~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~r~0,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 28]: Loop Invariant [2019-10-14 23:18:02,459 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~p~0,QUANTIFIED] [2019-10-14 23:18:02,459 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~r~0,QUANTIFIED] [2019-10-14 23:18:02,460 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~r~0,QUANTIFIED] [2019-10-14 23:18:02,460 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~p~0,QUANTIFIED] [2019-10-14 23:18:02,460 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~r~0,QUANTIFIED] [2019-10-14 23:18:02,460 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~p~0,QUANTIFIED] [2019-10-14 23:18:02,460 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~p~0,QUANTIFIED] [2019-10-14 23:18:02,460 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~r~0,QUANTIFIED] [2019-10-14 23:18:02,461 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~p~0,QUANTIFIED] [2019-10-14 23:18:02,463 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~r~0,QUANTIFIED] [2019-10-14 23:18:02,463 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~r~0,QUANTIFIED] [2019-10-14 23:18:02,464 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~p~0,QUANTIFIED] [2019-10-14 23:18:02,464 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~r~0,QUANTIFIED] [2019-10-14 23:18:02,464 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~p~0,QUANTIFIED] [2019-10-14 23:18:02,464 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~p~0,QUANTIFIED] [2019-10-14 23:18:02,464 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~r~0,QUANTIFIED] Derived loop invariant: (((\exists main_~p~0 : int, main_~r~0 : int :: 2 * (x * main_~p~0) + b + 2 * (y * main_~r~0) == y * (main_~r~0 * 2 + s) + x * (main_~p~0 * 2 + q) && (main_~r~0 * 2 + s) * (main_~p~0 + q) + 1 == (main_~p~0 * 2 + q) * (main_~r~0 + s)) && y * (r + s) + x * (p + q) == a + b) && (p + q) * s == (r + s) * q + 1) && 1 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Result: SAFE, OverallTime: 49.7s, OverallIterations: 15, TraceHistogramMax: 9, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 38.8s, HoareTripleCheckerStatistics: 477 SDtfs, 118 SDslu, 1488 SDs, 0 SdLazy, 956 SolverSat, 71 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 511 GetRequests, 428 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=194occurred in iteration=14, 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, 15 MinimizatonAttempts, 36 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 13 LocationsWithAnnotation, 82 PreInvPairs, 158 NumberOfFragments, 747 HoareAnnotationTreeSize, 82 FomulaSimplifications, 8378 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 13 FomulaSimplificationsInter, 527 FormulaSimplificationTreeSizeReductionInter, 38.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 510 NumberOfCodeBlocks, 479 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 495 ConstructedInterpolants, 4 QuantifiedInterpolants, 123486 SizeOfPredicates, 53 NumberOfNonLiveVariables, 1211 ConjunctsInSsa, 282 ConjunctsInUnsatCore, 15 InterpolantComputations, 7 PerfectInterpolantSequences, 692/798 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...