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/poly1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:49:56,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:49:56,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:49:56,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:49:56,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:49:56,907 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:49:56,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:49:56,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:49:56,921 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:49:56,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:49:56,926 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:49:56,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:49:56,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:49:56,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:49:56,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:49:56,932 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:49:56,934 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:49:56,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:49:56,937 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:49:56,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:49:56,945 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:49:56,947 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:49:56,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:49:56,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:49:56,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:49:56,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:49:56,953 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:49:56,954 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:49:56,955 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:49:56,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:49:56,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:49:56,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:49:56,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:49:56,958 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:49:56,960 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:49:56,960 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:49:56,960 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:49:56,961 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:49:56,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:49:56,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:49:56,963 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:49:56,964 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 21:49:56,985 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:49:56,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:49:56,987 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:49:56,987 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:49:56,988 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:49:56,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:49:56,988 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:49:56,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:49:56,988 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:49:56,989 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:49:56,989 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:49:56,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:49:56,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:49:56,990 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:49:56,990 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:49:56,991 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:49:56,991 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:49:56,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:49:56,991 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:49:56,991 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:49:56,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:49:56,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:49:56,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:49:56,993 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:49:56,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:49:56,994 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:49:56,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:49:56,994 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:49:56,994 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:49:57,256 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:49:57,277 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:49:57,280 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:49:57,282 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:49:57,282 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:49:57,283 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/poly1.c [2019-10-14 21:49:57,359 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/605cf146d/b741cab97d644bceaaf434ced665a534/FLAG967694bc7 [2019-10-14 21:49:57,816 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:49:57,817 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/poly1.c [2019-10-14 21:49:57,824 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/605cf146d/b741cab97d644bceaaf434ced665a534/FLAG967694bc7 [2019-10-14 21:49:58,162 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/605cf146d/b741cab97d644bceaaf434ced665a534 [2019-10-14 21:49:58,172 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:49:58,174 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:49:58,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:49:58,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:49:58,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:49:58,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:49:58" (1/1) ... [2019-10-14 21:49:58,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16f8855d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:58, skipping insertion in model container [2019-10-14 21:49:58,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:49:58" (1/1) ... [2019-10-14 21:49:58,191 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:49:58,208 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:49:58,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:49:58,500 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:49:58,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:49:58,545 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:49:58,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:58 WrapperNode [2019-10-14 21:49:58,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:49:58,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:49:58,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:49:58,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:49:58,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:58" (1/1) ... [2019-10-14 21:49:58,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:58" (1/1) ... [2019-10-14 21:49:58,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:58" (1/1) ... [2019-10-14 21:49:58,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:58" (1/1) ... [2019-10-14 21:49:58,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:58" (1/1) ... [2019-10-14 21:49:58,712 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:58" (1/1) ... [2019-10-14 21:49:58,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:58" (1/1) ... [2019-10-14 21:49:58,723 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:49:58,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:49:58,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:49:58,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:49:58,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:49:58,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:49:58,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:49:58,788 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:49:58,788 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:49:58,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:49:58,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 21:49:58,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:49:58,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:49:58,789 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 21:49:58,789 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:49:58,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 21:49:58,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:49:58,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:49:58,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:49:58,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:49:58,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:49:59,082 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:49:59,083 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-14 21:49:59,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:49:59 BoogieIcfgContainer [2019-10-14 21:49:59,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:49:59,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:49:59,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:49:59,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:49:59,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:49:58" (1/3) ... [2019-10-14 21:49:59,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b1765c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:49:59, skipping insertion in model container [2019-10-14 21:49:59,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:58" (2/3) ... [2019-10-14 21:49:59,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b1765c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:49:59, skipping insertion in model container [2019-10-14 21:49:59,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:49:59" (3/3) ... [2019-10-14 21:49:59,093 INFO L109 eAbstractionObserver]: Analyzing ICFG poly1.c [2019-10-14 21:49:59,104 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:49:59,112 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:49:59,124 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:49:59,150 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:49:59,150 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:49:59,151 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:49:59,151 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:49:59,151 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:49:59,151 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:49:59,151 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:49:59,151 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:49:59,171 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-10-14 21:49:59,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 21:49:59,180 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:59,181 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:59,185 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:59,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:59,191 INFO L82 PathProgramCache]: Analyzing trace with hash -516860939, now seen corresponding path program 1 times [2019-10-14 21:49:59,200 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:59,200 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143231294] [2019-10-14 21:49:59,201 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:59,201 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:59,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:59,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:59,399 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 21:49:59,400 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143231294] [2019-10-14 21:49:59,400 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:49:59,401 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:49:59,401 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001941117] [2019-10-14 21:49:59,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:49:59,405 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:59,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:49:59,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:49:59,418 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2019-10-14 21:49:59,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:59,516 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2019-10-14 21:49:59,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:49:59,518 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-14 21:49:59,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:59,527 INFO L225 Difference]: With dead ends: 41 [2019-10-14 21:49:59,527 INFO L226 Difference]: Without dead ends: 20 [2019-10-14 21:49:59,531 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 [2019-10-14 21:49:59,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-14 21:49:59,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-14 21:49:59,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-14 21:49:59,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-10-14 21:49:59,570 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2019-10-14 21:49:59,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:59,570 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-10-14 21:49:59,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:49:59,571 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-10-14 21:49:59,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 21:49:59,572 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:59,572 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:59,572 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:59,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:59,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1546915729, now seen corresponding path program 1 times [2019-10-14 21:49:59,573 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:59,574 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194526354] [2019-10-14 21:49:59,574 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:59,574 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:59,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:59,607 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:49:59,607 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634955808] [2019-10-14 21:49:59,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:49:59,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:59,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:49:59,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:59,719 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 21:49:59,720 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194526354] [2019-10-14 21:49:59,720 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:49:59,721 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634955808] [2019-10-14 21:49:59,721 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:49:59,721 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:49:59,721 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995709855] [2019-10-14 21:49:59,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:49:59,727 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:59,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:49:59,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:49:59,728 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 3 states. [2019-10-14 21:49:59,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:59,761 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-10-14 21:49:59,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:49:59,761 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-14 21:49:59,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:59,763 INFO L225 Difference]: With dead ends: 33 [2019-10-14 21:49:59,763 INFO L226 Difference]: Without dead ends: 22 [2019-10-14 21:49:59,764 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:49:59,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-14 21:49:59,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-10-14 21:49:59,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-14 21:49:59,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-10-14 21:49:59,772 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2019-10-14 21:49:59,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:59,772 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-10-14 21:49:59,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:49:59,773 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-10-14 21:49:59,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:49:59,774 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:59,774 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:59,979 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:59,979 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:59,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:59,981 INFO L82 PathProgramCache]: Analyzing trace with hash -586037587, now seen corresponding path program 1 times [2019-10-14 21:49:59,981 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:59,982 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557554776] [2019-10-14 21:49:59,982 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:59,982 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:59,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:00,014 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:50:00,015 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006058081] [2019-10-14 21:50:00,018 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 21:50:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:00,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:50:00,094 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:00,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:00,121 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557554776] [2019-10-14 21:50:00,121 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:50:00,121 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006058081] [2019-10-14 21:50:00,121 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:50:00,121 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-14 21:50:00,122 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644138962] [2019-10-14 21:50:00,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:50:00,123 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:00,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:50:00,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:50:00,123 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 4 states. [2019-10-14 21:50:00,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:00,184 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2019-10-14 21:50:00,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:50:00,184 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-14 21:50:00,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:00,185 INFO L225 Difference]: With dead ends: 35 [2019-10-14 21:50:00,186 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 21:50:00,186 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:50:00,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 21:50:00,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-10-14 21:50:00,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 21:50:00,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-10-14 21:50:00,193 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2019-10-14 21:50:00,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:00,193 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-10-14 21:50:00,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:50:00,193 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-10-14 21:50:00,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 21:50:00,194 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:00,194 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:00,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:00,399 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:00,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:00,399 INFO L82 PathProgramCache]: Analyzing trace with hash -600111765, now seen corresponding path program 2 times [2019-10-14 21:50:00,400 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:00,400 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027082643] [2019-10-14 21:50:00,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:00,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:00,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:00,418 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:50:00,419 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411823094] [2019-10-14 21:50:00,419 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:00,475 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:50:00,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:50:00,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:50:00,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:00,549 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 28 treesize of output 24 [2019-10-14 21:50:00,550 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:00,637 INFO L567 ElimStorePlain]: treesize reduction 36, result has 34.5 percent of original size [2019-10-14 21:50:00,637 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_6| vanished before elimination [2019-10-14 21:50:00,638 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:00,638 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:19 [2019-10-14 21:50:00,745 INFO L341 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2019-10-14 21:50:00,746 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 [2019-10-14 21:50:00,747 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:00,753 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:00,754 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:00,754 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-10-14 21:50:00,792 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:00,815 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:00,815 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:00,855 INFO L341 Elim1Store]: treesize reduction 10, result has 75.6 percent of original size [2019-10-14 21:50:00,856 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 48 [2019-10-14 21:50:00,857 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:00,873 INFO L567 ElimStorePlain]: treesize reduction 32, result has 17.9 percent of original size [2019-10-14 21:50:00,873 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:00,874 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2019-10-14 21:50:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:00,917 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027082643] [2019-10-14 21:50:00,917 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:50:00,917 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411823094] [2019-10-14 21:50:00,917 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:50:00,918 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 21:50:00,918 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744578100] [2019-10-14 21:50:00,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:50:00,920 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:00,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:50:00,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:50:00,921 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2019-10-14 21:50:01,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:01,740 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2019-10-14 21:50:01,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:50:01,742 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-10-14 21:50:01,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:01,748 INFO L225 Difference]: With dead ends: 48 [2019-10-14 21:50:01,748 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 21:50:01,749 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:50:01,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 21:50:01,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2019-10-14 21:50:01,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 21:50:01,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-14 21:50:01,780 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 18 [2019-10-14 21:50:01,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:01,782 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-14 21:50:01,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:50:01,783 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-14 21:50:01,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:50:01,784 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:01,784 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:01,985 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:01,985 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:01,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:01,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1240494935, now seen corresponding path program 3 times [2019-10-14 21:50:01,987 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:01,987 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504994140] [2019-10-14 21:50:01,988 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:01,988 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:01,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:01,998 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:50:01,998 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1115904198] [2019-10-14 21:50:01,999 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:02,060 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 21:50:02,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:50:02,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 21:50:02,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:02,088 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 31 treesize of output 27 [2019-10-14 21:50:02,089 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:02,163 INFO L567 ElimStorePlain]: treesize reduction 39, result has 36.1 percent of original size [2019-10-14 21:50:02,163 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_8| vanished before elimination [2019-10-14 21:50:02,164 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:02,164 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:22 [2019-10-14 21:50:02,229 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:02,261 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:02,268 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 51 [2019-10-14 21:50:02,269 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:02,276 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:02,277 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:02,298 INFO L567 ElimStorePlain]: treesize reduction 5, result has 89.6 percent of original size [2019-10-14 21:50:02,299 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:02,299 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:107, output treesize:43 [2019-10-14 21:50:02,349 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:02,351 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:02,353 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:02,354 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:02,354 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2019-10-14 21:50:02,355 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:02,365 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:02,365 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:02,365 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-10-14 21:50:02,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:02,416 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:02,416 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:02,420 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:02,421 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:50:02,423 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:02,424 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 24 [2019-10-14 21:50:02,425 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:02,433 INFO L567 ElimStorePlain]: treesize reduction 5, result has 58.3 percent of original size [2019-10-14 21:50:02,433 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:02,434 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:86, output treesize:7 [2019-10-14 21:50:02,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:02,475 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504994140] [2019-10-14 21:50:02,475 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:50:02,475 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115904198] [2019-10-14 21:50:02,476 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:50:02,476 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-14 21:50:02,476 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440882551] [2019-10-14 21:50:02,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:50:02,477 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:02,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:50:02,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:50:02,478 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 12 states. [2019-10-14 21:50:03,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:03,164 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2019-10-14 21:50:03,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:50:03,165 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2019-10-14 21:50:03,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:03,167 INFO L225 Difference]: With dead ends: 63 [2019-10-14 21:50:03,167 INFO L226 Difference]: Without dead ends: 61 [2019-10-14 21:50:03,168 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:50:03,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-14 21:50:03,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2019-10-14 21:50:03,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:50:03,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2019-10-14 21:50:03,177 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 20 [2019-10-14 21:50:03,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:03,177 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2019-10-14 21:50:03,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:50:03,177 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2019-10-14 21:50:03,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:50:03,178 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:03,178 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:03,383 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:03,383 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:03,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:03,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1826569319, now seen corresponding path program 4 times [2019-10-14 21:50:03,384 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:03,385 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486724182] [2019-10-14 21:50:03,385 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:03,385 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:03,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:03,405 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:50:03,405 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570944303] [2019-10-14 21:50:03,405 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 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 21:50:03,454 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:50:03,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:50:03,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:50:03,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:03,472 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 28 treesize of output 24 [2019-10-14 21:50:03,473 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:03,752 WARN L191 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2019-10-14 21:50:03,752 INFO L567 ElimStorePlain]: treesize reduction 36, result has 34.5 percent of original size [2019-10-14 21:50:03,752 INFO L464 ElimStorePlain]: Eliminatee v_prenex_3 vanished before elimination [2019-10-14 21:50:03,752 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:03,753 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:19 [2019-10-14 21:50:03,820 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:03,829 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:03,829 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:03,848 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:03,849 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 35 treesize of output 64 [2019-10-14 21:50:03,849 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:03,887 INFO L567 ElimStorePlain]: treesize reduction 35, result has 42.6 percent of original size [2019-10-14 21:50:03,887 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:03,888 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:73, output treesize:26 [2019-10-14 21:50:03,917 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:03,927 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:03,928 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:03,929 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:03,939 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 58 [2019-10-14 21:50:03,940 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:03,943 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:03,943 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:03,965 INFO L567 ElimStorePlain]: treesize reduction 5, result has 90.4 percent of original size [2019-10-14 21:50:03,965 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:03,966 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:115, output treesize:47 [2019-10-14 21:50:04,056 INFO L341 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2019-10-14 21:50:04,057 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 6 case distinctions, treesize of input 39 treesize of output 44 [2019-10-14 21:50:04,058 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:04,071 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:04,071 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:04,072 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:35 [2019-10-14 21:50:04,113 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:04,133 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:50:04,134 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:04,139 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:04,140 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:04,141 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:04,142 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:04,143 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:04,143 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:50:04,151 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 24 [2019-10-14 21:50:04,152 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:04,154 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:04,155 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:04,162 INFO L567 ElimStorePlain]: treesize reduction 5, result has 58.3 percent of original size [2019-10-14 21:50:04,162 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:04,162 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2019-10-14 21:50:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:04,202 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486724182] [2019-10-14 21:50:04,202 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:50:04,202 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570944303] [2019-10-14 21:50:04,202 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:50:04,202 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-14 21:50:04,203 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686769677] [2019-10-14 21:50:04,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:50:04,203 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:04,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:50:04,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:50:04,204 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 14 states. [2019-10-14 21:50:05,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:05,138 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2019-10-14 21:50:05,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:50:05,139 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2019-10-14 21:50:05,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:05,140 INFO L225 Difference]: With dead ends: 74 [2019-10-14 21:50:05,140 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 21:50:05,141 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:50:05,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 21:50:05,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 36. [2019-10-14 21:50:05,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 21:50:05,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-14 21:50:05,149 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2019-10-14 21:50:05,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:05,150 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-14 21:50:05,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:50:05,150 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-14 21:50:05,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:50:05,151 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:05,151 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:05,354 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:05,355 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:05,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:05,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1367214939, now seen corresponding path program 5 times [2019-10-14 21:50:05,355 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:05,356 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421825565] [2019-10-14 21:50:05,356 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:05,356 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:05,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:05,367 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:50:05,367 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343040039] [2019-10-14 21:50:05,368 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 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 21:50:20,523 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 21:50:20,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:50:20,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 21:50:20,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:20,540 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 28 treesize of output 24 [2019-10-14 21:50:20,540 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:20,637 INFO L567 ElimStorePlain]: treesize reduction 36, result has 34.5 percent of original size [2019-10-14 21:50:20,637 INFO L464 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2019-10-14 21:50:20,638 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:20,638 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:19 [2019-10-14 21:50:20,709 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:20,720 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:20,720 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:20,734 INFO L341 Elim1Store]: treesize reduction 55, result has 21.4 percent of original size [2019-10-14 21:50:20,735 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 49 treesize of output 48 [2019-10-14 21:50:20,736 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:20,754 INFO L567 ElimStorePlain]: treesize reduction 5, result has 88.9 percent of original size [2019-10-14 21:50:20,755 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:20,755 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:101, output treesize:40 [2019-10-14 21:50:20,786 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:20,797 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:20,798 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:20,849 INFO L341 Elim1Store]: treesize reduction 132, result has 19.0 percent of original size [2019-10-14 21:50:20,849 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 3 case distinctions, treesize of input 70 treesize of output 72 [2019-10-14 21:50:20,850 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:20,881 INFO L567 ElimStorePlain]: treesize reduction 5, result has 92.4 percent of original size [2019-10-14 21:50:20,882 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:20,882 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:143, output treesize:61 [2019-10-14 21:50:20,946 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:20,951 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:20,952 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:21,041 INFO L341 Elim1Store]: treesize reduction 32, result has 80.0 percent of original size [2019-10-14 21:50:21,042 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 6 case distinctions, treesize of input 53 treesize of output 160 [2019-10-14 21:50:21,043 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:21,088 INFO L567 ElimStorePlain]: treesize reduction 107, result has 29.1 percent of original size [2019-10-14 21:50:21,088 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:21,089 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:109, output treesize:44 [2019-10-14 21:50:21,182 INFO L341 Elim1Store]: treesize reduction 164, result has 17.6 percent of original size [2019-10-14 21:50:21,183 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 56 [2019-10-14 21:50:21,184 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:21,195 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:21,195 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:21,195 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2019-10-14 21:50:21,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:21,292 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:21,292 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:21,357 INFO L341 Elim1Store]: treesize reduction 112, result has 41.4 percent of original size [2019-10-14 21:50:21,357 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 105 [2019-10-14 21:50:21,358 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:21,372 INFO L567 ElimStorePlain]: treesize reduction 80, result has 8.0 percent of original size [2019-10-14 21:50:21,373 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:21,373 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:133, output treesize:7 [2019-10-14 21:50:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:21,437 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421825565] [2019-10-14 21:50:21,437 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:50:21,437 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343040039] [2019-10-14 21:50:21,437 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:50:21,437 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-10-14 21:50:21,438 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711919] [2019-10-14 21:50:21,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:50:21,438 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:21,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:50:21,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:50:21,439 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 16 states. [2019-10-14 21:50:22,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:22,281 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2019-10-14 21:50:22,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:50:22,283 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2019-10-14 21:50:22,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:22,284 INFO L225 Difference]: With dead ends: 81 [2019-10-14 21:50:22,285 INFO L226 Difference]: Without dead ends: 79 [2019-10-14 21:50:22,286 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:50:22,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-14 21:50:22,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 38. [2019-10-14 21:50:22,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 21:50:22,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2019-10-14 21:50:22,295 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 24 [2019-10-14 21:50:22,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:22,295 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2019-10-14 21:50:22,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:50:22,296 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2019-10-14 21:50:22,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 21:50:22,296 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:22,297 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:22,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:22,497 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:22,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:22,498 INFO L82 PathProgramCache]: Analyzing trace with hash 876156287, now seen corresponding path program 1 times [2019-10-14 21:50:22,498 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:22,498 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72555908] [2019-10-14 21:50:22,498 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:22,499 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:22,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:22,511 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:50:22,512 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035753480] [2019-10-14 21:50:22,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:22,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:50:22,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:22,577 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 13 treesize of output 9 [2019-10-14 21:50:22,577 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:22,585 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:22,586 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:22,586 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2019-10-14 21:50:22,695 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:22,701 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:50:22,702 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:50:22,703 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2019-10-14 21:50:22,704 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:22,705 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:22,705 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:22,713 INFO L567 ElimStorePlain]: treesize reduction 5, result has 58.3 percent of original size [2019-10-14 21:50:22,714 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:22,714 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:7 [2019-10-14 21:50:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:22,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72555908] [2019-10-14 21:50:22,745 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:50:22,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035753480] [2019-10-14 21:50:22,746 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:50:22,746 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-14 21:50:22,746 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210965735] [2019-10-14 21:50:22,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:50:22,747 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:22,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:50:22,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:50:22,747 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 13 states. [2019-10-14 21:50:23,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:23,003 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2019-10-14 21:50:23,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:50:23,004 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2019-10-14 21:50:23,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:23,006 INFO L225 Difference]: With dead ends: 75 [2019-10-14 21:50:23,006 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 21:50:23,007 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:50:23,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 21:50:23,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 47. [2019-10-14 21:50:23,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 21:50:23,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2019-10-14 21:50:23,016 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 26 [2019-10-14 21:50:23,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:23,016 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2019-10-14 21:50:23,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:50:23,016 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2019-10-14 21:50:23,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 21:50:23,017 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:23,018 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:23,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:23,229 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:23,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:23,230 INFO L82 PathProgramCache]: Analyzing trace with hash 307729763, now seen corresponding path program 6 times [2019-10-14 21:50:23,230 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:23,230 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415592779] [2019-10-14 21:50:23,230 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:23,231 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:23,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:23,239 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:50:23,240 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918727353] [2019-10-14 21:50:23,240 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 21:50:24,436 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:50:24,436 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:50:24,438 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-14 21:50:24,441 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:24,488 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 37 treesize of output 33 [2019-10-14 21:50:24,488 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:24,908 WARN L191 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2019-10-14 21:50:24,909 INFO L567 ElimStorePlain]: treesize reduction 45, result has 38.4 percent of original size [2019-10-14 21:50:24,909 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_21| vanished before elimination [2019-10-14 21:50:24,909 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:24,909 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:77, output treesize:28 [2019-10-14 21:50:25,009 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:25,013 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:25,014 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:25,016 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,017 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 43 [2019-10-14 21:50:25,018 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:25,046 INFO L567 ElimStorePlain]: treesize reduction 5, result has 87.5 percent of original size [2019-10-14 21:50:25,047 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:25,047 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:35 [2019-10-14 21:50:25,088 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:25,099 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,101 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,102 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,111 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 55 [2019-10-14 21:50:25,111 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:25,115 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:25,115 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:25,150 INFO L567 ElimStorePlain]: treesize reduction 5, result has 89.8 percent of original size [2019-10-14 21:50:25,150 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:25,150 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:109, output treesize:44 [2019-10-14 21:50:25,204 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:25,216 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,217 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,218 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,219 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,220 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,220 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,235 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 79 [2019-10-14 21:50:25,236 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:25,251 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:25,251 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:25,288 INFO L567 ElimStorePlain]: treesize reduction 5, result has 92.9 percent of original size [2019-10-14 21:50:25,288 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:25,289 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:151, output treesize:65 [2019-10-14 21:50:25,359 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:25,366 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:25,366 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:25,369 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,370 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,371 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,373 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,374 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,375 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,376 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,377 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,377 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,378 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,379 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:25,379 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 95 treesize of output 103 [2019-10-14 21:50:25,380 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:25,439 INFO L567 ElimStorePlain]: treesize reduction 5, result has 94.5 percent of original size [2019-10-14 21:50:25,439 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:25,440 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:193, output treesize:86 [2019-10-14 21:50:25,540 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:25,556 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:25,556 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:25,561 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,562 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,563 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,564 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,566 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,567 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,568 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,569 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,570 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,571 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,572 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,574 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,575 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,576 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,577 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,578 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:25,579 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 83 treesize of output 94 [2019-10-14 21:50:25,580 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:25,632 INFO L567 ElimStorePlain]: treesize reduction 8, result has 89.9 percent of original size [2019-10-14 21:50:25,633 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:25,633 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:169, output treesize:71 [2019-10-14 21:50:25,833 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:25,854 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:25,854 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:25,858 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,859 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,861 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:25,862 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:50:25,865 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:25,866 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 62 treesize of output 33 [2019-10-14 21:50:25,867 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:25,874 INFO L567 ElimStorePlain]: treesize reduction 5, result has 58.3 percent of original size [2019-10-14 21:50:25,875 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:25,875 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:128, output treesize:7 [2019-10-14 21:50:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:25,934 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415592779] [2019-10-14 21:50:25,935 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:50:25,935 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918727353] [2019-10-14 21:50:25,935 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:50:25,935 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-10-14 21:50:25,935 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204875271] [2019-10-14 21:50:25,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:50:25,936 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:25,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:50:25,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:50:25,936 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 22 states. [2019-10-14 21:50:26,208 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-10-14 21:50:27,658 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2019-10-14 21:50:27,941 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2019-10-14 21:50:28,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:28,815 INFO L93 Difference]: Finished difference Result 102 states and 116 transitions. [2019-10-14 21:50:28,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 21:50:28,816 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2019-10-14 21:50:28,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:28,818 INFO L225 Difference]: With dead ends: 102 [2019-10-14 21:50:28,818 INFO L226 Difference]: Without dead ends: 100 [2019-10-14 21:50:28,820 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=238, Invalid=1742, Unknown=0, NotChecked=0, Total=1980 [2019-10-14 21:50:28,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-14 21:50:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 49. [2019-10-14 21:50:28,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 21:50:28,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2019-10-14 21:50:28,831 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 26 [2019-10-14 21:50:28,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:28,832 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2019-10-14 21:50:28,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:50:28,832 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2019-10-14 21:50:28,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 21:50:28,833 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:28,833 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:29,043 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:29,044 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:29,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:29,044 INFO L82 PathProgramCache]: Analyzing trace with hash -114721091, now seen corresponding path program 2 times [2019-10-14 21:50:29,045 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:29,045 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876951723] [2019-10-14 21:50:29,045 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:29,045 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:29,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:29,055 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:50:29,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528908329] [2019-10-14 21:50:29,055 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 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 21:50:29,108 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:50:29,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:50:29,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 21:50:29,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:29,122 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:29,123 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:29,157 INFO L567 ElimStorePlain]: treesize reduction 5, result has 82.1 percent of original size [2019-10-14 21:50:29,159 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 19 treesize of output 15 [2019-10-14 21:50:29,160 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:29,165 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:29,166 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:29,166 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:19 [2019-10-14 21:50:29,198 INFO L341 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2019-10-14 21:50:29,199 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 23 treesize of output 22 [2019-10-14 21:50:29,200 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:29,204 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:29,204 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:29,204 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2019-10-14 21:50:29,314 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:29,320 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:50:29,321 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:29,322 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:50:29,323 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 40 treesize of output 18 [2019-10-14 21:50:29,324 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:29,325 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:29,326 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:29,332 INFO L567 ElimStorePlain]: treesize reduction 5, result has 58.3 percent of original size [2019-10-14 21:50:29,333 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:29,333 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:7 [2019-10-14 21:50:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:29,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876951723] [2019-10-14 21:50:29,379 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:50:29,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528908329] [2019-10-14 21:50:29,379 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:50:29,380 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-14 21:50:29,380 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030304221] [2019-10-14 21:50:29,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:50:29,380 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:29,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:50:29,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:50:29,381 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 15 states. [2019-10-14 21:50:29,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:29,771 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2019-10-14 21:50:29,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 21:50:29,774 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2019-10-14 21:50:29,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:29,775 INFO L225 Difference]: With dead ends: 92 [2019-10-14 21:50:29,775 INFO L226 Difference]: Without dead ends: 90 [2019-10-14 21:50:29,776 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:50:29,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-14 21:50:29,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 49. [2019-10-14 21:50:29,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 21:50:29,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2019-10-14 21:50:29,795 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 28 [2019-10-14 21:50:29,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:29,796 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2019-10-14 21:50:29,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:50:29,797 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2019-10-14 21:50:29,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 21:50:29,797 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:29,798 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:30,001 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:30,002 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:30,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:30,002 INFO L82 PathProgramCache]: Analyzing trace with hash -683147615, now seen corresponding path program 7 times [2019-10-14 21:50:30,002 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:30,003 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222621339] [2019-10-14 21:50:30,003 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:30,003 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:30,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:30,010 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:50:30,010 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [34483834] [2019-10-14 21:50:30,010 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 21:50:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:30,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-14 21:50:30,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:30,282 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:30,283 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:30,380 INFO L567 ElimStorePlain]: treesize reduction 5, result has 82.1 percent of original size [2019-10-14 21:50:30,387 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 19 treesize of output 15 [2019-10-14 21:50:30,388 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:30,418 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:30,419 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:30,419 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:19 [2019-10-14 21:50:30,490 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:30,495 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:30,495 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:30,512 INFO L341 Elim1Store]: treesize reduction 55, result has 21.4 percent of original size [2019-10-14 21:50:30,513 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 49 treesize of output 48 [2019-10-14 21:50:30,513 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:30,529 INFO L567 ElimStorePlain]: treesize reduction 5, result has 88.9 percent of original size [2019-10-14 21:50:30,530 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:30,530 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:101, output treesize:40 [2019-10-14 21:50:30,559 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:30,564 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:30,565 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:30,566 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:30,574 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 46 [2019-10-14 21:50:30,574 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:30,577 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:30,578 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:30,594 INFO L567 ElimStorePlain]: treesize reduction 5, result has 87.5 percent of original size [2019-10-14 21:50:30,595 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:30,595 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:35 [2019-10-14 21:50:30,630 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:30,636 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:30,637 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:30,638 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:30,639 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:30,639 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:30,640 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:30,655 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 70 [2019-10-14 21:50:30,655 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:30,658 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:30,658 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:30,684 INFO L567 ElimStorePlain]: treesize reduction 5, result has 91.8 percent of original size [2019-10-14 21:50:30,685 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:30,685 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:133, output treesize:56 [2019-10-14 21:50:30,744 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:30,752 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:30,753 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:30,893 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2019-10-14 21:50:30,894 INFO L341 Elim1Store]: treesize reduction 66, result has 72.4 percent of original size [2019-10-14 21:50:30,894 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 208 [2019-10-14 21:50:30,895 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:30,946 INFO L567 ElimStorePlain]: treesize reduction 143, result has 27.0 percent of original size [2019-10-14 21:50:30,946 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:30,946 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:127, output treesize:53 [2019-10-14 21:50:30,999 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:31,007 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:31,008 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:31,009 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:31,011 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:31,012 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:31,013 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:31,014 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:31,015 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:31,016 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:31,017 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:31,018 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:31,019 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:31,020 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:31,021 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:31,022 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:31,053 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 82 [2019-10-14 21:50:31,054 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:31,070 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:31,070 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:31,106 INFO L567 ElimStorePlain]: treesize reduction 5, result has 92.5 percent of original size [2019-10-14 21:50:31,107 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:31,107 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:145, output treesize:62 [2019-10-14 21:50:31,275 INFO L341 Elim1Store]: treesize reduction 320, result has 14.2 percent of original size [2019-10-14 21:50:31,275 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 66 treesize of output 80 [2019-10-14 21:50:31,277 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:31,291 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:31,292 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:31,292 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:62 [2019-10-14 21:50:31,371 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:31,388 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:31,388 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:31,529 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 55 [2019-10-14 21:50:31,529 INFO L341 Elim1Store]: treesize reduction 240, result has 31.6 percent of original size [2019-10-14 21:50:31,529 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 83 treesize of output 143 [2019-10-14 21:50:31,530 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:31,552 INFO L567 ElimStorePlain]: treesize reduction 112, result has 5.9 percent of original size [2019-10-14 21:50:31,552 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:31,552 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:169, output treesize:7 [2019-10-14 21:50:31,613 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:31,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222621339] [2019-10-14 21:50:31,613 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:50:31,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34483834] [2019-10-14 21:50:31,613 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:50:31,614 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-10-14 21:50:31,614 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544831117] [2019-10-14 21:50:31,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:50:31,614 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:31,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:50:31,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:50:31,615 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 20 states. [2019-10-14 21:50:33,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:33,315 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2019-10-14 21:50:33,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:50:33,315 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2019-10-14 21:50:33,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:33,317 INFO L225 Difference]: With dead ends: 109 [2019-10-14 21:50:33,317 INFO L226 Difference]: Without dead ends: 107 [2019-10-14 21:50:33,318 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:50:33,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-14 21:50:33,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 51. [2019-10-14 21:50:33,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 21:50:33,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2019-10-14 21:50:33,330 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 28 [2019-10-14 21:50:33,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:33,330 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2019-10-14 21:50:33,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:50:33,331 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2019-10-14 21:50:33,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:50:33,332 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:33,332 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:33,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:33,535 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:33,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:33,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1134858363, now seen corresponding path program 3 times [2019-10-14 21:50:33,536 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:33,536 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282816081] [2019-10-14 21:50:33,536 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:33,537 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:33,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:33,543 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:50:33,544 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681956186] [2019-10-14 21:50:33,544 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 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 21:50:35,758 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-14 21:50:35,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:50:35,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 38 conjunts are in the unsatisfiable core [2019-10-14 21:50:35,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:35,809 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 34 treesize of output 30 [2019-10-14 21:50:35,810 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:35,838 INFO L567 ElimStorePlain]: treesize reduction 42, result has 37.3 percent of original size [2019-10-14 21:50:35,839 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_36| vanished before elimination [2019-10-14 21:50:35,839 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:35,840 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:25 [2019-10-14 21:50:35,880 INFO L341 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2019-10-14 21:50:35,881 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 23 treesize of output 22 [2019-10-14 21:50:35,881 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:35,888 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:35,889 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:35,889 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2019-10-14 21:50:35,904 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:35,910 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:35,911 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:35,912 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:35,925 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 56 [2019-10-14 21:50:35,926 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:35,930 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:36,003 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:36,004 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 126 [2019-10-14 21:50:36,005 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:36,184 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2019-10-14 21:50:36,185 INFO L567 ElimStorePlain]: treesize reduction 48, result has 71.9 percent of original size [2019-10-14 21:50:36,185 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-10-14 21:50:36,186 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:107, output treesize:123 [2019-10-14 21:50:36,264 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:36,265 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:36,266 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:36,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:36,774 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2019-10-14 21:50:36,777 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:50:37,368 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2019-10-14 21:50:37,427 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:37,437 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:50:37,438 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:37,439 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:37,440 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:37,440 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:50:37,445 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 47 [2019-10-14 21:50:37,446 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:37,449 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 21:50:37,449 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:37,470 INFO L567 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2019-10-14 21:50:37,471 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 21:50:37,471 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:173, output treesize:22 [2019-10-14 21:50:37,505 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:37,560 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282816081] [2019-10-14 21:50:37,560 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:50:37,560 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681956186] [2019-10-14 21:50:37,560 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:50:37,560 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-10-14 21:50:37,560 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364254387] [2019-10-14 21:50:37,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:50:37,561 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:37,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:50:37,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=403, Unknown=1, NotChecked=0, Total=462 [2019-10-14 21:50:37,562 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 22 states. [2019-10-14 21:50:38,511 WARN L191 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2019-10-14 21:50:40,874 WARN L191 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2019-10-14 21:50:43,539 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 35 [2019-10-14 21:50:43,885 WARN L191 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 33 [2019-10-14 21:50:44,701 WARN L191 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 39 [2019-10-14 21:50:46,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:46,880 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2019-10-14 21:50:46,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:50:46,882 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2019-10-14 21:50:46,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:46,884 INFO L225 Difference]: With dead ends: 107 [2019-10-14 21:50:46,884 INFO L226 Difference]: Without dead ends: 105 [2019-10-14 21:50:46,885 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=297, Invalid=1507, Unknown=2, NotChecked=0, Total=1806 [2019-10-14 21:50:46,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-14 21:50:46,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 51. [2019-10-14 21:50:46,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 21:50:46,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2019-10-14 21:50:46,893 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 30 [2019-10-14 21:50:46,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:46,894 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2019-10-14 21:50:46,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:50:46,894 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2019-10-14 21:50:46,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:50:46,895 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:46,895 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:47,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:47,104 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:47,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:47,105 INFO L82 PathProgramCache]: Analyzing trace with hash 566431839, now seen corresponding path program 8 times [2019-10-14 21:50:47,105 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:47,105 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492756820] [2019-10-14 21:50:47,105 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:47,106 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:47,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:47,113 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:50:47,113 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435653285] [2019-10-14 21:50:47,113 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 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 21:50:47,318 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:50:47,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:50:47,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 40 conjunts are in the unsatisfiable core [2019-10-14 21:50:47,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:47,335 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 31 treesize of output 27 [2019-10-14 21:50:47,335 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.