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/array-tiling/poly2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:51:05,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:51:05,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:51:05,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:51:05,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:51:05,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:51:05,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:51:05,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:51:05,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:51:05,782 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:51:05,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:51:05,787 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:51:05,787 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:51:05,790 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:51:05,791 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:51:05,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:51:05,795 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:51:05,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:51:05,798 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:51:05,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:51:05,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:51:05,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:51:05,810 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:51:05,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:51:05,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 17:51:05,815 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 17:51:05,815 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 17:51:05,816 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 17:51:05,817 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 17:51:05,818 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 17:51:05,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:51:05,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:51:05,821 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:51:05,822 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:51:05,824 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:51:05,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:51:05,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:51:05,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:51:05,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:51:05,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:51:05,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:51:05,828 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 17:51:05,846 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:51:05,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:51:05,850 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:51:05,850 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:51:05,850 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:51:05,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:51:05,851 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:51:05,851 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:51:05,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:51:05,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:51:05,853 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:51:05,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:51:05,853 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:51:05,854 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:51:05,854 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:51:05,854 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:51:05,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:51:05,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:51:05,855 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:51:05,855 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:51:05,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:51:05,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:51:05,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:51:05,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:51:05,857 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:51:05,857 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:51:05,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:51:05,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:51:05,858 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:51:06,130 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:51:06,151 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:51:06,156 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:51:06,158 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:51:06,158 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:51:06,159 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/poly2.c [2019-10-13 17:51:06,241 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79ac826c0/e3a716465e624e7bba127b2beff11d99/FLAG8e4d3ed9d [2019-10-13 17:51:06,688 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:51:06,689 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/poly2.c [2019-10-13 17:51:06,696 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79ac826c0/e3a716465e624e7bba127b2beff11d99/FLAG8e4d3ed9d [2019-10-13 17:51:07,058 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79ac826c0/e3a716465e624e7bba127b2beff11d99 [2019-10-13 17:51:07,068 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:51:07,069 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:51:07,070 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:51:07,070 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:51:07,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:51:07,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:51:07" (1/1) ... [2019-10-13 17:51:07,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1067e46e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:51:07, skipping insertion in model container [2019-10-13 17:51:07,078 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:51:07" (1/1) ... [2019-10-13 17:51:07,085 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:51:07,103 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:51:07,266 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:51:07,277 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:51:07,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:51:07,312 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:51:07,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:51:07 WrapperNode [2019-10-13 17:51:07,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:51:07,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:51:07,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:51:07,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:51:07,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:51:07" (1/1) ... [2019-10-13 17:51:07,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:51:07" (1/1) ... [2019-10-13 17:51:07,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:51:07" (1/1) ... [2019-10-13 17:51:07,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:51:07" (1/1) ... [2019-10-13 17:51:07,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:51:07" (1/1) ... [2019-10-13 17:51:07,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:51:07" (1/1) ... [2019-10-13 17:51:07,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:51:07" (1/1) ... [2019-10-13 17:51:07,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:51:07,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:51:07,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:51:07,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:51:07,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:51:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:51:07,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:51:07,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:51:07,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:51:07,494 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:51:07,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:51:07,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 17:51:07,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:51:07,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:51:07,495 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 17:51:07,495 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:51:07,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 17:51:07,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:51:07,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:51:07,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:51:07,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:51:07,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:51:07,786 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:51:07,786 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-13 17:51:07,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:51:07 BoogieIcfgContainer [2019-10-13 17:51:07,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:51:07,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:51:07,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:51:07,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:51:07,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:51:07" (1/3) ... [2019-10-13 17:51:07,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722985dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:51:07, skipping insertion in model container [2019-10-13 17:51:07,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:51:07" (2/3) ... [2019-10-13 17:51:07,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722985dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:51:07, skipping insertion in model container [2019-10-13 17:51:07,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:51:07" (3/3) ... [2019-10-13 17:51:07,800 INFO L109 eAbstractionObserver]: Analyzing ICFG poly2.c [2019-10-13 17:51:07,807 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:51:07,814 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:51:07,824 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:51:07,847 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:51:07,847 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:51:07,848 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:51:07,848 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:51:07,848 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:51:07,848 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:51:07,848 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:51:07,848 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:51:07,865 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-10-13 17:51:07,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 17:51:07,870 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:51:07,871 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:51:07,873 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:51:07,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:51:07,879 INFO L82 PathProgramCache]: Analyzing trace with hash -718269197, now seen corresponding path program 1 times [2019-10-13 17:51:07,886 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:51:07,886 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954465387] [2019-10-13 17:51:07,887 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:07,887 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:07,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:51:08,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:08,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:51:08,104 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954465387] [2019-10-13 17:51:08,104 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:51:08,105 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:51:08,105 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414742803] [2019-10-13 17:51:08,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:51:08,110 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:51:08,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:51:08,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:51:08,126 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2019-10-13 17:51:08,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:51:08,250 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2019-10-13 17:51:08,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:51:08,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-13 17:51:08,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:51:08,261 INFO L225 Difference]: With dead ends: 47 [2019-10-13 17:51:08,261 INFO L226 Difference]: Without dead ends: 23 [2019-10-13 17:51:08,265 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:51:08,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-13 17:51:08,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-13 17:51:08,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-13 17:51:08,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-13 17:51:08,305 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 16 [2019-10-13 17:51:08,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:51:08,306 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-13 17:51:08,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:51:08,306 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-13 17:51:08,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 17:51:08,307 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:51:08,308 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:51:08,308 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:51:08,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:51:08,309 INFO L82 PathProgramCache]: Analyzing trace with hash 506468199, now seen corresponding path program 1 times [2019-10-13 17:51:08,309 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:51:08,310 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168401469] [2019-10-13 17:51:08,310 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:08,310 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:08,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:51:08,343 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:51:08,344 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445538554] [2019-10-13 17:51:08,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:51:08,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:08,405 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:51:08,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:51:08,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:51:08,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168401469] [2019-10-13 17:51:08,442 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:51:08,443 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445538554] [2019-10-13 17:51:08,443 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:51:08,443 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:51:08,444 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444582456] [2019-10-13 17:51:08,445 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:51:08,446 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:51:08,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:51:08,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:51:08,447 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 3 states. [2019-10-13 17:51:08,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:51:08,520 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2019-10-13 17:51:08,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:51:08,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-13 17:51:08,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:51:08,521 INFO L225 Difference]: With dead ends: 39 [2019-10-13 17:51:08,521 INFO L226 Difference]: Without dead ends: 25 [2019-10-13 17:51:08,522 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:51:08,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-13 17:51:08,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-10-13 17:51:08,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-13 17:51:08,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-13 17:51:08,530 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2019-10-13 17:51:08,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:51:08,530 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-13 17:51:08,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:51:08,530 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-13 17:51:08,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 17:51:08,531 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:51:08,531 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:51:08,735 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:51:08,736 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:51:08,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:51:08,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1419313573, now seen corresponding path program 1 times [2019-10-13 17:51:08,737 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:51:08,738 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458862459] [2019-10-13 17:51:08,738 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:08,739 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:08,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:51:08,757 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:51:08,758 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689638852] [2019-10-13 17:51:08,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:51:08,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:08,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:51:08,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:51:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:51:08,866 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458862459] [2019-10-13 17:51:08,866 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:51:08,866 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689638852] [2019-10-13 17:51:08,866 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:51:08,867 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-13 17:51:08,867 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284314512] [2019-10-13 17:51:08,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:51:08,867 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:51:08,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:51:08,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:51:08,868 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2019-10-13 17:51:08,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:51:08,969 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2019-10-13 17:51:08,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:51:08,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-13 17:51:08,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:51:08,971 INFO L225 Difference]: With dead ends: 41 [2019-10-13 17:51:08,971 INFO L226 Difference]: Without dead ends: 27 [2019-10-13 17:51:08,972 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:51:08,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-13 17:51:08,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-10-13 17:51:08,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-13 17:51:08,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-10-13 17:51:08,978 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2019-10-13 17:51:08,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:51:08,978 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-10-13 17:51:08,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:51:08,978 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-10-13 17:51:08,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:51:08,979 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:51:08,980 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:51:09,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:51:09,184 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:51:09,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:51:09,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1804577693, now seen corresponding path program 2 times [2019-10-13 17:51:09,185 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:51:09,186 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878001226] [2019-10-13 17:51:09,186 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:09,186 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:09,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:51:09,205 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:51:09,206 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266801961] [2019-10-13 17:51:09,207 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:51:09,268 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-13 17:51:09,269 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:51:09,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:51:09,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:51:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 17:51:09,309 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878001226] [2019-10-13 17:51:09,312 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:51:09,312 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266801961] [2019-10-13 17:51:09,313 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:51:09,313 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:51:09,313 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190076390] [2019-10-13 17:51:09,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:51:09,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:51:09,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:51:09,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:51:09,315 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 4 states. [2019-10-13 17:51:09,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:51:09,385 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2019-10-13 17:51:09,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:51:09,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-13 17:51:09,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:51:09,388 INFO L225 Difference]: With dead ends: 43 [2019-10-13 17:51:09,389 INFO L226 Difference]: Without dead ends: 32 [2019-10-13 17:51:09,389 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:51:09,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-13 17:51:09,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2019-10-13 17:51:09,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 17:51:09,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-10-13 17:51:09,400 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2019-10-13 17:51:09,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:51:09,401 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-10-13 17:51:09,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:51:09,401 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-10-13 17:51:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 17:51:09,402 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:51:09,402 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:51:09,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:51:09,614 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:51:09,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:51:09,615 INFO L82 PathProgramCache]: Analyzing trace with hash 908918625, now seen corresponding path program 1 times [2019-10-13 17:51:09,615 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:51:09,616 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194026396] [2019-10-13 17:51:09,616 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:09,617 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:09,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:51:09,632 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:51:09,633 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8375366] [2019-10-13 17:51:09,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:51:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:09,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:51:09,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:51:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 17:51:09,719 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194026396] [2019-10-13 17:51:09,719 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:51:09,720 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8375366] [2019-10-13 17:51:09,720 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:51:09,720 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-13 17:51:09,720 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438830911] [2019-10-13 17:51:09,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:51:09,721 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:51:09,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:51:09,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:51:09,722 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 5 states. [2019-10-13 17:51:09,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:51:09,795 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2019-10-13 17:51:09,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:51:09,796 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-10-13 17:51:09,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:51:09,797 INFO L225 Difference]: With dead ends: 50 [2019-10-13 17:51:09,797 INFO L226 Difference]: Without dead ends: 39 [2019-10-13 17:51:09,798 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:51:09,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-13 17:51:09,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2019-10-13 17:51:09,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 17:51:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-10-13 17:51:09,805 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2019-10-13 17:51:09,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:51:09,805 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-10-13 17:51:09,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:51:09,805 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-10-13 17:51:09,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 17:51:09,806 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:51:09,806 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:51:10,009 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:51:10,010 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:51:10,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:51:10,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1533731551, now seen corresponding path program 2 times [2019-10-13 17:51:10,011 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:51:10,012 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610116777] [2019-10-13 17:51:10,012 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:10,012 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:10,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:51:10,024 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:51:10,026 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967779955] [2019-10-13 17:51:10,026 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:51:10,087 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:51:10,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:51:10,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 17:51:10,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:51:10,144 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:10,144 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:10,334 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-10-13 17:51:10,335 INFO L567 ElimStorePlain]: treesize reduction 5, result has 83.3 percent of original size [2019-10-13 17:51:10,347 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2019-10-13 17:51:10,348 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:10,416 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:51:10,417 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:10,417 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:21 [2019-10-13 17:51:10,551 INFO L341 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2019-10-13 17:51:10,552 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2019-10-13 17:51:10,553 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:10,558 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:51:10,559 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:10,559 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-10-13 17:51:10,588 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:10,599 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:10,599 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:10,691 INFO L341 Elim1Store]: treesize reduction 10, result has 91.9 percent of original size [2019-10-13 17:51:10,692 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 142 [2019-10-13 17:51:10,694 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:10,725 INFO L567 ElimStorePlain]: treesize reduction 133, result has 17.4 percent of original size [2019-10-13 17:51:10,726 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:10,726 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:112, output treesize:28 [2019-10-13 17:51:10,784 INFO L341 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2019-10-13 17:51:10,784 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 25 [2019-10-13 17:51:10,785 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:10,793 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:51:10,794 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:10,794 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2019-10-13 17:51:10,831 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:10,841 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:51:10,842 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:10,843 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:51:10,847 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2019-10-13 17:51:10,847 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:10,850 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:10,850 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:10,858 INFO L567 ElimStorePlain]: treesize reduction 5, result has 58.3 percent of original size [2019-10-13 17:51:10,859 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:10,859 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2019-10-13 17:51:10,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:51:10,912 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610116777] [2019-10-13 17:51:10,912 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:51:10,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967779955] [2019-10-13 17:51:10,913 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:51:10,913 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-13 17:51:10,913 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758642600] [2019-10-13 17:51:10,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:51:10,914 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:51:10,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:51:10,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:51:10,915 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 14 states. [2019-10-13 17:51:11,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:51:11,601 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2019-10-13 17:51:11,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:51:11,602 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2019-10-13 17:51:11,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:51:11,603 INFO L225 Difference]: With dead ends: 56 [2019-10-13 17:51:11,603 INFO L226 Difference]: Without dead ends: 54 [2019-10-13 17:51:11,604 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:51:11,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-13 17:51:11,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2019-10-13 17:51:11,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-13 17:51:11,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-10-13 17:51:11,613 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 24 [2019-10-13 17:51:11,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:51:11,614 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-10-13 17:51:11,614 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:51:11,614 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-10-13 17:51:11,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 17:51:11,615 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:51:11,615 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:51:11,818 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:51:11,819 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:51:11,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:51:11,820 INFO L82 PathProgramCache]: Analyzing trace with hash 534556445, now seen corresponding path program 3 times [2019-10-13 17:51:11,821 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:51:11,821 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063373618] [2019-10-13 17:51:11,822 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:11,822 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:11,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:51:11,830 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:51:11,831 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104281715] [2019-10-13 17:51:11,831 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 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 [2019-10-13 17:51:11,898 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-13 17:51:11,899 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:51:11,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:51:11,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:51:11,971 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:51:11,972 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063373618] [2019-10-13 17:51:11,972 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:51:11,972 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104281715] [2019-10-13 17:51:11,973 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:51:11,973 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-13 17:51:11,973 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656091402] [2019-10-13 17:51:11,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:51:11,974 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:51:11,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:51:11,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:51:11,974 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 9 states. [2019-10-13 17:51:12,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:51:12,172 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2019-10-13 17:51:12,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 17:51:12,172 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2019-10-13 17:51:12,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:51:12,174 INFO L225 Difference]: With dead ends: 83 [2019-10-13 17:51:12,175 INFO L226 Difference]: Without dead ends: 72 [2019-10-13 17:51:12,175 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:51:12,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-13 17:51:12,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2019-10-13 17:51:12,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-13 17:51:12,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2019-10-13 17:51:12,185 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 26 [2019-10-13 17:51:12,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:51:12,186 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2019-10-13 17:51:12,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:51:12,186 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2019-10-13 17:51:12,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 17:51:12,187 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:51:12,187 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:51:12,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:51:12,397 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:51:12,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:51:12,398 INFO L82 PathProgramCache]: Analyzing trace with hash 683531997, now seen corresponding path program 4 times [2019-10-13 17:51:12,398 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:51:12,398 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071694280] [2019-10-13 17:51:12,399 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:12,399 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:12,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:51:12,408 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:51:12,408 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97656173] [2019-10-13 17:51:12,409 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 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 [2019-10-13 17:51:12,458 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:51:12,459 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:51:12,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:51:12,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:51:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:51:12,541 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071694280] [2019-10-13 17:51:12,541 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:51:12,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97656173] [2019-10-13 17:51:12,542 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:51:12,542 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-13 17:51:12,542 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999567015] [2019-10-13 17:51:12,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:51:12,543 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:51:12,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:51:12,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:51:12,543 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 9 states. [2019-10-13 17:51:12,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:51:12,693 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2019-10-13 17:51:12,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 17:51:12,693 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2019-10-13 17:51:12,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:51:12,694 INFO L225 Difference]: With dead ends: 86 [2019-10-13 17:51:12,695 INFO L226 Difference]: Without dead ends: 68 [2019-10-13 17:51:12,695 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:51:12,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-13 17:51:12,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 52. [2019-10-13 17:51:12,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-13 17:51:12,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2019-10-13 17:51:12,705 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 26 [2019-10-13 17:51:12,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:51:12,707 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2019-10-13 17:51:12,707 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:51:12,708 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2019-10-13 17:51:12,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 17:51:12,709 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:51:12,709 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:51:12,910 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:51:12,910 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:51:12,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:51:12,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1746037861, now seen corresponding path program 5 times [2019-10-13 17:51:12,911 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:51:12,912 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271134228] [2019-10-13 17:51:12,912 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:12,912 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:12,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:51:12,920 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:51:12,921 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582210515] [2019-10-13 17:51:12,921 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true