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-f4eb214f-m [2019-10-13 17:50:56,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:50:56,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:50:56,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:50:56,262 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:50:56,263 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:50:56,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:50:56,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:50:56,272 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:50:56,274 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:50:56,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:50:56,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:50:56,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:50:56,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:50:56,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:50:56,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:50:56,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:50:56,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:50:56,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:50:56,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:50:56,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:50:56,288 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:50:56,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:50:56,290 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:50:56,292 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 17:50:56,292 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 17:50:56,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 17:50:56,293 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 17:50:56,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 17:50:56,295 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 17:50:56,295 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:50:56,296 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:50:56,297 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:50:56,298 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:50:56,299 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:50:56,299 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:50:56,300 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:50:56,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:50:56,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:50:56,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:50:56,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:50:56,303 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 17:50:56,317 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:50:56,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:50:56,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:50:56,320 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:50:56,320 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:50:56,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:50:56,320 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:50:56,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:50:56,321 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:50:56,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:50:56,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:50:56,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:50:56,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:50:56,322 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:50:56,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:50:56,323 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:50:56,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:50:56,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:50:56,325 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:50:56,325 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:50:56,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:50:56,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:50:56,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:50:56,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:50:56,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:50:56,326 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:50:56,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:50:56,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:50:56,327 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:50:56,602 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:50:56,618 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:50:56,623 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:50:56,624 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:50:56,625 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:50:56,626 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/poly1.c [2019-10-13 17:50:56,709 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad0059aba/fa5f966cd6ce4e75a5bd479e151bf0df/FLAG8725d66eb [2019-10-13 17:50:57,222 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:50:57,225 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/poly1.c [2019-10-13 17:50:57,232 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad0059aba/fa5f966cd6ce4e75a5bd479e151bf0df/FLAG8725d66eb [2019-10-13 17:50:57,535 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad0059aba/fa5f966cd6ce4e75a5bd479e151bf0df [2019-10-13 17:50:57,544 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:50:57,545 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:50:57,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:50:57,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:50:57,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:50:57,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:50:57" (1/1) ... [2019-10-13 17:50:57,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64fff5c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:57, skipping insertion in model container [2019-10-13 17:50:57,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:50:57" (1/1) ... [2019-10-13 17:50:57,563 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:50:57,584 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:50:57,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:50:57,797 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:50:57,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:50:57,826 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:50:57,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:57 WrapperNode [2019-10-13 17:50:57,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:50:57,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:50:57,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:50:57,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:50:57,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:57" (1/1) ... [2019-10-13 17:50:57,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:57" (1/1) ... [2019-10-13 17:50:57,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:57" (1/1) ... [2019-10-13 17:50:57,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:57" (1/1) ... [2019-10-13 17:50:57,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:57" (1/1) ... [2019-10-13 17:50:57,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:57" (1/1) ... [2019-10-13 17:50:57,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:57" (1/1) ... [2019-10-13 17:50:57,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:50:57,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:50:57,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:50:57,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:50:57,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:50:58,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:50:58,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:50:58,018 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:50:58,018 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:50:58,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:50:58,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 17:50:58,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:50:58,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:50:58,019 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 17:50:58,019 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:50:58,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 17:50:58,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:50:58,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:50:58,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:50:58,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:50:58,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:50:58,287 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:50:58,288 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-13 17:50:58,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:50:58 BoogieIcfgContainer [2019-10-13 17:50:58,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:50:58,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:50:58,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:50:58,298 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:50:58,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:50:57" (1/3) ... [2019-10-13 17:50:58,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b0cb30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:50:58, skipping insertion in model container [2019-10-13 17:50:58,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:57" (2/3) ... [2019-10-13 17:50:58,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b0cb30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:50:58, skipping insertion in model container [2019-10-13 17:50:58,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:50:58" (3/3) ... [2019-10-13 17:50:58,302 INFO L109 eAbstractionObserver]: Analyzing ICFG poly1.c [2019-10-13 17:50:58,313 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:50:58,321 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:50:58,332 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:50:58,362 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:50:58,362 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:50:58,362 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:50:58,362 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:50:58,362 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:50:58,362 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:50:58,362 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:50:58,363 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:50:58,377 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-10-13 17:50:58,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 17:50:58,383 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:58,384 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:50:58,385 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:58,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:58,390 INFO L82 PathProgramCache]: Analyzing trace with hash -516860939, now seen corresponding path program 1 times [2019-10-13 17:50:58,396 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:58,397 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133005315] [2019-10-13 17:50:58,397 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:58,397 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:58,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:58,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:50:58,587 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133005315] [2019-10-13 17:50:58,588 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:50:58,588 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:50:58,589 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272304216] [2019-10-13 17:50:58,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:50:58,593 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:50:58,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:50:58,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:50:58,612 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2019-10-13 17:50:58,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:50:58,734 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2019-10-13 17:50:58,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:50:58,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-13 17:50:58,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:50:58,747 INFO L225 Difference]: With dead ends: 41 [2019-10-13 17:50:58,747 INFO L226 Difference]: Without dead ends: 20 [2019-10-13 17:50:58,751 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:50:58,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-13 17:50:58,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-13 17:50:58,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-13 17:50:58,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-10-13 17:50:58,790 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2019-10-13 17:50:58,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:50:58,791 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-10-13 17:50:58,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:50:58,791 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-10-13 17:50:58,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 17:50:58,792 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:58,793 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:50:58,793 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:58,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:58,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1546915729, now seen corresponding path program 1 times [2019-10-13 17:50:58,794 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:58,794 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311574396] [2019-10-13 17:50:58,795 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:58,795 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:58,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:58,826 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:50:58,826 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394503206] [2019-10-13 17:50:58,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:50:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:58,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:50:58,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:50:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:50:58,945 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311574396] [2019-10-13 17:50:58,948 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:50:58,948 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394503206] [2019-10-13 17:50:58,949 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:50:58,949 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:50:58,949 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713504949] [2019-10-13 17:50:58,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:50:58,952 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:50:58,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:50:58,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:50:58,953 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 3 states. [2019-10-13 17:50:58,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:50:59,000 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-10-13 17:50:59,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:50:59,000 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-13 17:50:59,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:50:59,001 INFO L225 Difference]: With dead ends: 33 [2019-10-13 17:50:59,002 INFO L226 Difference]: Without dead ends: 22 [2019-10-13 17:50:59,003 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 [2019-10-13 17:50:59,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-13 17:50:59,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-10-13 17:50:59,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-13 17:50:59,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-10-13 17:50:59,015 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2019-10-13 17:50:59,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:50:59,018 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-10-13 17:50:59,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:50:59,018 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-10-13 17:50:59,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 17:50:59,020 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:59,020 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:50:59,229 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:50:59,229 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:59,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:59,230 INFO L82 PathProgramCache]: Analyzing trace with hash -586037587, now seen corresponding path program 1 times [2019-10-13 17:50:59,230 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:59,230 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753184038] [2019-10-13 17:50:59,230 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:59,230 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:59,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:59,254 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:50:59,255 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847897606] [2019-10-13 17:50:59,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:50:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:59,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:50:59,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:50:59,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:50:59,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753184038] [2019-10-13 17:50:59,348 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:50:59,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847897606] [2019-10-13 17:50:59,348 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:50:59,348 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-13 17:50:59,349 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683239285] [2019-10-13 17:50:59,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:50:59,350 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:50:59,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:50:59,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:50:59,351 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 4 states. [2019-10-13 17:50:59,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:50:59,416 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2019-10-13 17:50:59,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:50:59,416 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-13 17:50:59,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:50:59,417 INFO L225 Difference]: With dead ends: 35 [2019-10-13 17:50:59,417 INFO L226 Difference]: Without dead ends: 24 [2019-10-13 17:50:59,418 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 [2019-10-13 17:50:59,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-13 17:50:59,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-10-13 17:50:59,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-13 17:50:59,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-10-13 17:50:59,424 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2019-10-13 17:50:59,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:50:59,425 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-10-13 17:50:59,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:50:59,425 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-10-13 17:50:59,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 17:50:59,426 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:59,426 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:50:59,633 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:50:59,634 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:59,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:59,634 INFO L82 PathProgramCache]: Analyzing trace with hash -600111765, now seen corresponding path program 2 times [2019-10-13 17:50:59,634 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:59,634 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345496926] [2019-10-13 17:50:59,635 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:59,635 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:59,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:59,670 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:50:59,671 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58830528] [2019-10-13 17:50:59,671 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:50:59,720 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:50:59,720 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:50:59,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 17:50:59,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:50:59,784 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 [2019-10-13 17:50:59,785 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:50:59,880 INFO L567 ElimStorePlain]: treesize reduction 36, result has 34.5 percent of original size [2019-10-13 17:50:59,881 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_6| vanished before elimination [2019-10-13 17:50:59,881 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:50:59,882 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:19 [2019-10-13 17:50:59,988 INFO L341 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2019-10-13 17:50:59,989 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2019-10-13 17:50:59,990 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:50:59,999 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:50:59,999 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:50:59,999 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-10-13 17:51:00,058 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:00,082 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:00,082 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:00,122 INFO L341 Elim1Store]: treesize reduction 10, result has 75.6 percent of original size [2019-10-13 17:51:00,123 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 [2019-10-13 17:51:00,124 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:00,141 INFO L567 ElimStorePlain]: treesize reduction 32, result has 17.9 percent of original size [2019-10-13 17:51:00,141 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:00,142 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2019-10-13 17:51:00,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:51:00,186 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345496926] [2019-10-13 17:51:00,187 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:51:00,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58830528] [2019-10-13 17:51:00,187 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:51:00,187 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-13 17:51:00,188 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345598862] [2019-10-13 17:51:00,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 17:51:00,188 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:51:00,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 17:51:00,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:51:00,191 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2019-10-13 17:51:01,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:51:01,009 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2019-10-13 17:51:01,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:51:01,012 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-10-13 17:51:01,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:51:01,015 INFO L225 Difference]: With dead ends: 48 [2019-10-13 17:51:01,015 INFO L226 Difference]: Without dead ends: 46 [2019-10-13 17:51:01,016 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 [2019-10-13 17:51:01,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-13 17:51:01,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2019-10-13 17:51:01,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-13 17:51:01,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-13 17:51:01,032 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 18 [2019-10-13 17:51:01,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:51:01,032 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-13 17:51:01,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 17:51:01,033 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-13 17:51:01,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:51:01,035 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:51:01,035 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:51:01,239 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:51:01,239 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:51:01,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:51:01,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1240494935, now seen corresponding path program 3 times [2019-10-13 17:51:01,240 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:51:01,240 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601421613] [2019-10-13 17:51:01,241 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:01,241 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:01,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:51:01,264 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:51:01,266 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [550128788] [2019-10-13 17:51:01,266 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 [2019-10-13 17:51:01,341 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-13 17:51:01,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:51:01,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-13 17:51:01,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:51:01,371 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 [2019-10-13 17:51:01,372 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:01,457 INFO L567 ElimStorePlain]: treesize reduction 39, result has 36.1 percent of original size [2019-10-13 17:51:01,457 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_8| vanished before elimination [2019-10-13 17:51:01,457 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:01,458 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:22 [2019-10-13 17:51:01,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:01,553 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:01,560 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 [2019-10-13 17:51:01,561 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:01,577 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:01,578 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:01,599 INFO L567 ElimStorePlain]: treesize reduction 5, result has 89.6 percent of original size [2019-10-13 17:51:01,600 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:01,600 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:107, output treesize:43 [2019-10-13 17:51:01,646 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:01,649 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:01,651 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:01,652 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:51:01,653 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 [2019-10-13 17:51:01,654 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:01,663 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:51:01,663 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:01,664 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-10-13 17:51:01,713 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:01,720 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:01,720 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:01,724 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:01,725 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:51:01,727 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:51:01,728 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 [2019-10-13 17:51:01,729 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:01,738 INFO L567 ElimStorePlain]: treesize reduction 5, result has 58.3 percent of original size [2019-10-13 17:51:01,738 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:01,739 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:86, output treesize:7 [2019-10-13 17:51:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:51:01,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601421613] [2019-10-13 17:51:01,782 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:51:01,782 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550128788] [2019-10-13 17:51:01,782 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:51:01,782 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-13 17:51:01,783 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319372634] [2019-10-13 17:51:01,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:51:01,783 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:51:01,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:51:01,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:51:01,784 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 12 states. [2019-10-13 17:51:02,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:51:02,541 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2019-10-13 17:51:02,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:51:02,542 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2019-10-13 17:51:02,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:51:02,544 INFO L225 Difference]: With dead ends: 63 [2019-10-13 17:51:02,544 INFO L226 Difference]: Without dead ends: 61 [2019-10-13 17:51:02,545 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 [2019-10-13 17:51:02,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-13 17:51:02,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2019-10-13 17:51:02,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-13 17:51:02,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2019-10-13 17:51:02,555 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 20 [2019-10-13 17:51:02,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:51:02,555 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2019-10-13 17:51:02,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:51:02,556 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2019-10-13 17:51:02,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 17:51:02,556 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:51:02,557 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:51:02,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:51:02,766 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:51:02,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:51:02,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1826569319, now seen corresponding path program 4 times [2019-10-13 17:51:02,767 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:51:02,767 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211533722] [2019-10-13 17:51:02,767 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:02,768 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:02,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:51:02,777 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:51:02,777 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836548710] [2019-10-13 17:51:02,778 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 [2019-10-13 17:51:02,825 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:51:02,825 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:51:02,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 17:51:02,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:51:02,852 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 [2019-10-13 17:51:02,852 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:03,150 WARN L191 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2019-10-13 17:51:03,150 INFO L567 ElimStorePlain]: treesize reduction 36, result has 34.5 percent of original size [2019-10-13 17:51:03,150 INFO L464 ElimStorePlain]: Eliminatee v_prenex_3 vanished before elimination [2019-10-13 17:51:03,151 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:03,151 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:19 [2019-10-13 17:51:03,231 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:03,237 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:03,237 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:03,255 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:51:03,256 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 [2019-10-13 17:51:03,257 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:03,294 INFO L567 ElimStorePlain]: treesize reduction 35, result has 42.6 percent of original size [2019-10-13 17:51:03,294 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:03,294 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:73, output treesize:26 [2019-10-13 17:51:03,340 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:03,355 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:03,357 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:03,358 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:03,369 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 [2019-10-13 17:51:03,370 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:03,374 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:03,374 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:03,399 INFO L567 ElimStorePlain]: treesize reduction 5, result has 90.4 percent of original size [2019-10-13 17:51:03,399 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:03,399 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:115, output treesize:47 [2019-10-13 17:51:03,489 INFO L341 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2019-10-13 17:51:03,490 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 [2019-10-13 17:51:03,491 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:03,500 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:51:03,500 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:03,501 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:35 [2019-10-13 17:51:03,546 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:03,554 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:51:03,555 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:03,557 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:03,558 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:03,559 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:03,560 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:03,561 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:03,562 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:51:03,570 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 [2019-10-13 17:51:03,571 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:03,573 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:03,574 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:03,581 INFO L567 ElimStorePlain]: treesize reduction 5, result has 58.3 percent of original size [2019-10-13 17:51:03,582 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:03,582 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2019-10-13 17:51:03,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:51:03,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211533722] [2019-10-13 17:51:03,629 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:51:03,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836548710] [2019-10-13 17:51:03,629 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:51:03,630 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-13 17:51:03,630 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948906832] [2019-10-13 17:51:03,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:51:03,631 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:51:03,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:51:03,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:51:03,631 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 14 states. [2019-10-13 17:51:04,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:51:04,628 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2019-10-13 17:51:04,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:51:04,628 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2019-10-13 17:51:04,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:51:04,630 INFO L225 Difference]: With dead ends: 74 [2019-10-13 17:51:04,631 INFO L226 Difference]: Without dead ends: 72 [2019-10-13 17:51:04,631 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:51:04,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-13 17:51:04,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 36. [2019-10-13 17:51:04,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-13 17:51:04,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-13 17:51:04,639 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2019-10-13 17:51:04,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:51:04,640 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-13 17:51:04,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:51:04,640 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-13 17:51:04,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 17:51:04,640 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:51:04,641 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:51:04,841 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:51:04,842 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:51:04,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:51:04,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1367214939, now seen corresponding path program 5 times [2019-10-13 17:51:04,843 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:51:04,843 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575561249] [2019-10-13 17:51:04,843 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:04,844 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:04,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:51:04,852 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:51:04,852 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267657009] [2019-10-13 17:51:04,852 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 [2019-10-13 17:51:19,663 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-13 17:51:19,663 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:51:19,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-13 17:51:19,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:51:19,683 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 [2019-10-13 17:51:19,683 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:19,797 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2019-10-13 17:51:19,798 INFO L567 ElimStorePlain]: treesize reduction 36, result has 34.5 percent of original size [2019-10-13 17:51:19,798 INFO L464 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2019-10-13 17:51:19,798 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:19,798 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:19 [2019-10-13 17:51:19,880 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:19,887 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:19,888 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:19,904 INFO L341 Elim1Store]: treesize reduction 55, result has 21.4 percent of original size [2019-10-13 17:51:19,904 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 [2019-10-13 17:51:19,905 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:19,924 INFO L567 ElimStorePlain]: treesize reduction 5, result has 88.9 percent of original size [2019-10-13 17:51:19,924 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:19,925 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:101, output treesize:40 [2019-10-13 17:51:19,956 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:19,968 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:19,968 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:20,022 INFO L341 Elim1Store]: treesize reduction 132, result has 19.0 percent of original size [2019-10-13 17:51:20,023 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 [2019-10-13 17:51:20,024 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:20,058 INFO L567 ElimStorePlain]: treesize reduction 5, result has 92.4 percent of original size [2019-10-13 17:51:20,058 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:20,058 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:143, output treesize:61 [2019-10-13 17:51:20,147 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:20,154 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:20,155 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:20,156 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:20,159 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:20,160 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:20,161 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:20,173 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 53 treesize of output 58 [2019-10-13 17:51:20,174 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:20,177 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:20,178 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:20,205 INFO L567 ElimStorePlain]: treesize reduction 5, result has 89.8 percent of original size [2019-10-13 17:51:20,205 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:20,206 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:109, output treesize:44 [2019-10-13 17:51:20,311 INFO L341 Elim1Store]: treesize reduction 164, result has 17.6 percent of original size [2019-10-13 17:51:20,312 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 [2019-10-13 17:51:20,313 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:20,325 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:51:20,326 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:20,326 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2019-10-13 17:51:20,386 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:20,403 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:20,403 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:20,489 INFO L341 Elim1Store]: treesize reduction 112, result has 41.4 percent of original size [2019-10-13 17:51:20,490 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 [2019-10-13 17:51:20,492 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:20,507 INFO L567 ElimStorePlain]: treesize reduction 80, result has 8.0 percent of original size [2019-10-13 17:51:20,508 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:20,508 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:133, output treesize:7 [2019-10-13 17:51:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:51:20,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575561249] [2019-10-13 17:51:20,590 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:51:20,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267657009] [2019-10-13 17:51:20,590 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:51:20,590 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-10-13 17:51:20,590 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829530054] [2019-10-13 17:51:20,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 17:51:20,591 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:51:20,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 17:51:20,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:51:20,592 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 16 states. [2019-10-13 17:51:24,438 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2019-10-13 17:51:24,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:51:24,643 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2019-10-13 17:51:24,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 17:51:24,644 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2019-10-13 17:51:24,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:51:24,645 INFO L225 Difference]: With dead ends: 81 [2019-10-13 17:51:24,645 INFO L226 Difference]: Without dead ends: 79 [2019-10-13 17:51:24,646 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:51:24,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-13 17:51:24,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 38. [2019-10-13 17:51:24,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-13 17:51:24,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2019-10-13 17:51:24,655 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 24 [2019-10-13 17:51:24,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:51:24,655 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2019-10-13 17:51:24,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 17:51:24,655 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2019-10-13 17:51:24,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 17:51:24,656 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:51:24,656 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] [2019-10-13 17:51:24,857 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:51:24,858 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:51:24,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:51:24,858 INFO L82 PathProgramCache]: Analyzing trace with hash 876156287, now seen corresponding path program 1 times [2019-10-13 17:51:24,859 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:51:24,859 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589699256] [2019-10-13 17:51:24,859 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:24,860 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:24,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:51:24,880 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:51:24,881 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743753794] [2019-10-13 17:51:24,881 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 [2019-10-13 17:51:24,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:24,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 17:51:24,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:51:24,945 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 [2019-10-13 17:51:24,946 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:24,948 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:51:24,948 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:24,949 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2019-10-13 17:51:25,043 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:25,049 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:51:25,050 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:51:25,050 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 [2019-10-13 17:51:25,051 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:25,054 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:25,054 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:25,062 INFO L567 ElimStorePlain]: treesize reduction 5, result has 58.3 percent of original size [2019-10-13 17:51:25,063 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:25,063 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:7 [2019-10-13 17:51:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:51:25,106 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589699256] [2019-10-13 17:51:25,107 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:51:25,107 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743753794] [2019-10-13 17:51:25,107 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:51:25,107 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-13 17:51:25,107 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730439755] [2019-10-13 17:51:25,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:51:25,108 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:51:25,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:51:25,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:51:25,109 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 13 states. [2019-10-13 17:51:25,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:51:25,471 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2019-10-13 17:51:25,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:51:25,472 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2019-10-13 17:51:25,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:51:25,477 INFO L225 Difference]: With dead ends: 75 [2019-10-13 17:51:25,478 INFO L226 Difference]: Without dead ends: 73 [2019-10-13 17:51:25,479 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:51:25,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-13 17:51:25,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 47. [2019-10-13 17:51:25,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-13 17:51:25,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2019-10-13 17:51:25,499 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 26 [2019-10-13 17:51:25,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:51:25,499 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2019-10-13 17:51:25,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:51:25,499 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2019-10-13 17:51:25,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 17:51:25,505 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:51:25,506 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:51:25,706 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:51:25,707 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:51:25,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:51:25,707 INFO L82 PathProgramCache]: Analyzing trace with hash 307729763, now seen corresponding path program 6 times [2019-10-13 17:51:25,707 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:51:25,707 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583588240] [2019-10-13 17:51:25,707 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:25,708 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:25,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:51:25,724 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:51:25,724 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113461975] [2019-10-13 17:51:25,724 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 [2019-10-13 17:51:26,867 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-13 17:51:26,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:51:26,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-13 17:51:26,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:51:26,916 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 [2019-10-13 17:51:26,916 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:27,172 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2019-10-13 17:51:27,172 INFO L567 ElimStorePlain]: treesize reduction 45, result has 38.4 percent of original size [2019-10-13 17:51:27,172 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_21| vanished before elimination [2019-10-13 17:51:27,173 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:27,173 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:77, output treesize:28 [2019-10-13 17:51:27,277 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:27,282 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:27,283 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:27,286 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:27,287 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 [2019-10-13 17:51:27,288 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:27,320 INFO L567 ElimStorePlain]: treesize reduction 5, result has 87.5 percent of original size [2019-10-13 17:51:27,321 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:27,321 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:35 [2019-10-13 17:51:27,373 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:27,382 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:27,383 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:27,385 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:27,394 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 [2019-10-13 17:51:27,395 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:27,398 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:27,399 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:27,433 INFO L567 ElimStorePlain]: treesize reduction 5, result has 89.8 percent of original size [2019-10-13 17:51:27,433 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:27,433 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:109, output treesize:44 [2019-10-13 17:51:27,491 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:27,503 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:27,504 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:27,505 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:27,506 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:27,507 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:27,508 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:27,522 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 [2019-10-13 17:51:27,523 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:27,531 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:27,531 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:27,575 INFO L567 ElimStorePlain]: treesize reduction 5, result has 92.9 percent of original size [2019-10-13 17:51:27,575 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:27,576 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:151, output treesize:65 [2019-10-13 17:51:27,662 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:27,673 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:27,674 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:27,678 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:27,679 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:27,680 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:27,681 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:27,682 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:27,683 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:27,684 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:27,685 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:27,686 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:27,687 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:27,688 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:51:27,688 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 [2019-10-13 17:51:27,689 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:29,749 WARN L191 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2019-10-13 17:51:29,749 INFO L567 ElimStorePlain]: treesize reduction 5, result has 94.5 percent of original size [2019-10-13 17:51:29,750 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:29,750 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:193, output treesize:86 [2019-10-13 17:51:29,843 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:29,857 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:29,857 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:29,862 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:29,863 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:29,864 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:29,864 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:29,865 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:29,867 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:29,868 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:29,868 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:29,869 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:29,870 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:29,871 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:29,872 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:29,873 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:29,874 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:29,875 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:29,877 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:51:29,879 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 [2019-10-13 17:51:29,880 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:29,939 INFO L567 ElimStorePlain]: treesize reduction 8, result has 89.9 percent of original size [2019-10-13 17:51:29,940 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:29,940 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:169, output treesize:71 [2019-10-13 17:51:30,151 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:30,161 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:30,161 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:30,164 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:30,166 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:30,167 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:30,167 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:51:30,170 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:51:30,170 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 [2019-10-13 17:51:30,171 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:30,179 INFO L567 ElimStorePlain]: treesize reduction 5, result has 58.3 percent of original size [2019-10-13 17:51:30,179 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:30,180 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:128, output treesize:7 [2019-10-13 17:51:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:51:30,261 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583588240] [2019-10-13 17:51:30,261 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:51:30,261 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113461975] [2019-10-13 17:51:30,261 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:51:30,262 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-10-13 17:51:30,262 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139093890] [2019-10-13 17:51:30,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-13 17:51:30,262 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:51:30,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-13 17:51:30,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:51:30,263 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 22 states. [2019-10-13 17:51:30,634 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-10-13 17:51:31,267 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-10-13 17:51:31,448 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2019-10-13 17:51:35,006 WARN L191 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2019-10-13 17:51:35,175 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2019-10-13 17:51:36,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:51:36,108 INFO L93 Difference]: Finished difference Result 102 states and 116 transitions. [2019-10-13 17:51:36,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-13 17:51:36,109 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2019-10-13 17:51:36,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:51:36,111 INFO L225 Difference]: With dead ends: 102 [2019-10-13 17:51:36,111 INFO L226 Difference]: Without dead ends: 100 [2019-10-13 17:51:36,113 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=238, Invalid=1742, Unknown=0, NotChecked=0, Total=1980 [2019-10-13 17:51:36,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-13 17:51:36,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 49. [2019-10-13 17:51:36,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-13 17:51:36,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2019-10-13 17:51:36,124 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 26 [2019-10-13 17:51:36,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:51:36,124 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2019-10-13 17:51:36,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-13 17:51:36,124 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2019-10-13 17:51:36,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 17:51:36,125 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:51:36,125 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] [2019-10-13 17:51:36,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:51:36,331 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:51:36,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:51:36,332 INFO L82 PathProgramCache]: Analyzing trace with hash -114721091, now seen corresponding path program 2 times [2019-10-13 17:51:36,332 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:51:36,332 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132285163] [2019-10-13 17:51:36,332 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:36,333 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:36,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:51:36,348 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:51:36,348 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110728831] [2019-10-13 17:51:36,348 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 [2019-10-13 17:51:36,402 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:51:36,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:51:36,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-13 17:51:36,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:51:36,417 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:36,417 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:36,430 INFO L567 ElimStorePlain]: treesize reduction 5, result has 82.1 percent of original size [2019-10-13 17:51:36,433 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 [2019-10-13 17:51:36,433 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:36,442 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:51:36,442 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:36,442 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:19 [2019-10-13 17:51:36,478 INFO L341 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2019-10-13 17:51:36,478 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 [2019-10-13 17:51:36,479 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:36,484 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:51:36,485 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:36,485 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2019-10-13 17:51:36,619 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:36,623 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:51:36,624 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:36,624 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:51:36,627 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 [2019-10-13 17:51:36,627 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:36,630 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:36,631 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:36,643 INFO L567 ElimStorePlain]: treesize reduction 5, result has 58.3 percent of original size [2019-10-13 17:51:36,644 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:36,644 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:83, output treesize:7 [2019-10-13 17:51:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:51:36,687 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132285163] [2019-10-13 17:51:36,687 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:51:36,688 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110728831] [2019-10-13 17:51:36,688 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:51:36,688 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-13 17:51:36,688 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774436515] [2019-10-13 17:51:36,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 17:51:36,688 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:51:36,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 17:51:36,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:51:36,689 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 15 states. [2019-10-13 17:51:37,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:51:37,163 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2019-10-13 17:51:37,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 17:51:37,165 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2019-10-13 17:51:37,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:51:37,166 INFO L225 Difference]: With dead ends: 92 [2019-10-13 17:51:37,167 INFO L226 Difference]: Without dead ends: 90 [2019-10-13 17:51:37,167 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 [2019-10-13 17:51:37,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-13 17:51:37,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 49. [2019-10-13 17:51:37,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-13 17:51:37,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2019-10-13 17:51:37,177 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 28 [2019-10-13 17:51:37,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:51:37,178 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2019-10-13 17:51:37,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 17:51:37,178 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2019-10-13 17:51:37,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 17:51:37,179 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:51:37,179 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:51:37,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:51:37,391 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:51:37,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:51:37,392 INFO L82 PathProgramCache]: Analyzing trace with hash -683147615, now seen corresponding path program 7 times [2019-10-13 17:51:37,392 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:51:37,392 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831103331] [2019-10-13 17:51:37,392 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:37,392 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:37,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:51:37,399 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:51:37,399 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593265391] [2019-10-13 17:51:37,399 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 [2019-10-13 17:51:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:37,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-13 17:51:37,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:51:37,661 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:37,661 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:37,771 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2019-10-13 17:51:37,772 INFO L567 ElimStorePlain]: treesize reduction 5, result has 82.1 percent of original size [2019-10-13 17:51:37,776 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 [2019-10-13 17:51:37,776 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:37,814 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:51:37,814 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:37,815 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:19 [2019-10-13 17:51:37,865 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:37,871 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:37,877 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 49 treesize of output 48 [2019-10-13 17:51:37,878 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:37,881 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:37,881 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:37,900 INFO L567 ElimStorePlain]: treesize reduction 5, result has 88.9 percent of original size [2019-10-13 17:51:37,900 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:37,901 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:101, output treesize:40 [2019-10-13 17:51:37,931 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:37,942 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:37,944 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:37,945 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:37,953 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 [2019-10-13 17:51:37,953 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:37,956 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:37,957 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:37,975 INFO L567 ElimStorePlain]: treesize reduction 5, result has 87.5 percent of original size [2019-10-13 17:51:37,975 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:37,975 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:91, output treesize:35 [2019-10-13 17:51:38,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:38,024 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:38,024 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:38,025 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:38,026 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:38,026 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:38,027 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:38,043 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 [2019-10-13 17:51:38,044 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:38,047 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:38,047 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:38,079 INFO L567 ElimStorePlain]: treesize reduction 5, result has 91.8 percent of original size [2019-10-13 17:51:38,079 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:38,079 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:133, output treesize:56 [2019-10-13 17:51:38,129 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:38,136 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:38,137 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:38,291 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2019-10-13 17:51:38,291 INFO L341 Elim1Store]: treesize reduction 66, result has 72.4 percent of original size [2019-10-13 17:51:38,291 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 [2019-10-13 17:51:38,293 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:38,352 INFO L567 ElimStorePlain]: treesize reduction 143, result has 27.0 percent of original size [2019-10-13 17:51:38,353 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:38,353 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:127, output treesize:53 [2019-10-13 17:51:38,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:38,414 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:38,415 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:38,416 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:38,417 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:38,418 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:38,419 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:38,420 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:38,421 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:38,422 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:38,423 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:38,424 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:38,426 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:38,427 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:38,428 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:38,429 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:38,462 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 [2019-10-13 17:51:38,463 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:38,466 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:38,466 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:38,501 INFO L567 ElimStorePlain]: treesize reduction 5, result has 92.5 percent of original size [2019-10-13 17:51:38,501 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:38,502 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:145, output treesize:62 [2019-10-13 17:51:38,701 INFO L341 Elim1Store]: treesize reduction 320, result has 14.2 percent of original size [2019-10-13 17:51:38,702 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 [2019-10-13 17:51:38,703 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:38,724 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:51:38,724 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:38,725 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:62 [2019-10-13 17:51:38,806 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:38,812 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:38,812 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:38,960 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 55 [2019-10-13 17:51:38,960 INFO L341 Elim1Store]: treesize reduction 240, result has 31.6 percent of original size [2019-10-13 17:51:38,961 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 [2019-10-13 17:51:38,963 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:38,986 INFO L567 ElimStorePlain]: treesize reduction 112, result has 5.9 percent of original size [2019-10-13 17:51:38,986 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:38,987 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:169, output treesize:7 [2019-10-13 17:51:39,051 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:51:39,051 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831103331] [2019-10-13 17:51:39,051 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:51:39,051 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593265391] [2019-10-13 17:51:39,051 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:51:39,052 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-10-13 17:51:39,052 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290041302] [2019-10-13 17:51:39,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 17:51:39,052 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:51:39,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 17:51:39,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:51:39,053 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 20 states. [2019-10-13 17:51:40,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:51:40,798 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2019-10-13 17:51:40,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 17:51:40,798 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2019-10-13 17:51:40,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:51:40,799 INFO L225 Difference]: With dead ends: 109 [2019-10-13 17:51:40,799 INFO L226 Difference]: Without dead ends: 107 [2019-10-13 17:51:40,800 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 [2019-10-13 17:51:40,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-13 17:51:40,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 51. [2019-10-13 17:51:40,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-13 17:51:40,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2019-10-13 17:51:40,811 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 28 [2019-10-13 17:51:40,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:51:40,812 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2019-10-13 17:51:40,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 17:51:40,812 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2019-10-13 17:51:40,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 17:51:40,813 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:51:40,813 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] [2019-10-13 17:51:41,014 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:51:41,015 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:51:41,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:51:41,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1134858363, now seen corresponding path program 3 times [2019-10-13 17:51:41,016 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:51:41,016 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983053552] [2019-10-13 17:51:41,017 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:41,017 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:41,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:51:41,030 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:51:41,031 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441477681] [2019-10-13 17:51:41,031 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 [2019-10-13 17:51:43,127 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-13 17:51:43,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:51:43,128 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 38 conjunts are in the unsatisfiable core [2019-10-13 17:51:43,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:51:43,209 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 [2019-10-13 17:51:43,210 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:43,240 INFO L567 ElimStorePlain]: treesize reduction 42, result has 37.3 percent of original size [2019-10-13 17:51:43,240 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_36| vanished before elimination [2019-10-13 17:51:43,240 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:43,241 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:25 [2019-10-13 17:51:43,288 INFO L341 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2019-10-13 17:51:43,288 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 [2019-10-13 17:51:43,289 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:43,297 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:51:43,297 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:43,297 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2019-10-13 17:51:43,314 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:43,322 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:43,323 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:43,324 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:43,338 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 [2019-10-13 17:51:43,339 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:43,343 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:43,381 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:51:43,382 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 [2019-10-13 17:51:43,383 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:43,510 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2019-10-13 17:51:43,511 INFO L567 ElimStorePlain]: treesize reduction 48, result has 71.9 percent of original size [2019-10-13 17:51:43,511 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-10-13 17:51:43,512 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:107, output treesize:123 [2019-10-13 17:51:43,583 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:43,584 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:43,584 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:43,585 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:44,053 WARN L191 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2019-10-13 17:51:44,055 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 17:51:44,528 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2019-10-13 17:51:44,587 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:44,598 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:51:44,599 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:44,600 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:44,601 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:51:44,602 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-13 17:51:44,608 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 [2019-10-13 17:51:44,609 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:44,613 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 17:51:44,613 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:44,654 INFO L567 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2019-10-13 17:51:44,655 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. [2019-10-13 17:51:44,655 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:173, output treesize:22 [2019-10-13 17:51:44,686 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:51:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:51:44,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983053552] [2019-10-13 17:51:44,738 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:51:44,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441477681] [2019-10-13 17:51:44,739 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:51:44,739 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-10-13 17:51:44,739 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325378463] [2019-10-13 17:51:44,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-13 17:51:44,739 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:51:44,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-13 17:51:44,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:51:44,740 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 22 states. [2019-10-13 17:51:45,446 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46