java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/ps6.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:18:43,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:18:43,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:18:43,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:18:43,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:18:43,317 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:18:43,319 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:18:43,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:18:43,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:18:43,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:18:43,337 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:18:43,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:18:43,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:18:43,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:18:43,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:18:43,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:18:43,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:18:43,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:18:43,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:18:43,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:18:43,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:18:43,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:18:43,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:18:43,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:18:43,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 19:18:43,368 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:18:43,369 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:18:43,369 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:18:43,370 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:18:43,371 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:18:43,371 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:18:43,372 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:18:43,372 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:18:43,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:18:43,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:18:43,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:18:43,374 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 19:18:43,387 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:18:43,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:18:43,389 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:18:43,389 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:18:43,389 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:18:43,389 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:18:43,390 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:18:43,390 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:18:43,390 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:18:43,390 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:18:43,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:18:43,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:18:43,391 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:18:43,391 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:18:43,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:18:43,391 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:18:43,392 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:18:43,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:18:43,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:18:43,392 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:18:43,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:18:43,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:18:43,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:18:43,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:18:43,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:18:43,393 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:18:43,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:18:43,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:18:43,394 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:18:43,667 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:18:43,683 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:18:43,686 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:18:43,687 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:18:43,688 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:18:43,689 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps6.c [2019-10-13 19:18:43,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30af99705/2430ac6ac7e746b2b560d6d069d23e34/FLAG99a16ec47 [2019-10-13 19:18:44,196 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:18:44,196 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps6.c [2019-10-13 19:18:44,203 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30af99705/2430ac6ac7e746b2b560d6d069d23e34/FLAG99a16ec47 [2019-10-13 19:18:44,620 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30af99705/2430ac6ac7e746b2b560d6d069d23e34 [2019-10-13 19:18:44,629 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:18:44,631 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:18:44,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:18:44,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:18:44,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:18:44,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:18:44" (1/1) ... [2019-10-13 19:18:44,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@382d0cb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:44, skipping insertion in model container [2019-10-13 19:18:44,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:18:44" (1/1) ... [2019-10-13 19:18:44,644 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:18:44,658 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:18:44,838 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:18:44,841 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:18:44,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:18:44,876 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:18:44,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:44 WrapperNode [2019-10-13 19:18:44,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:18:44,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:18:44,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:18:44,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:18:44,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:44" (1/1) ... [2019-10-13 19:18:44,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:44" (1/1) ... [2019-10-13 19:18:44,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:44" (1/1) ... [2019-10-13 19:18:44,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:44" (1/1) ... [2019-10-13 19:18:44,984 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:44" (1/1) ... [2019-10-13 19:18:44,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:44" (1/1) ... [2019-10-13 19:18:44,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:44" (1/1) ... [2019-10-13 19:18:44,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:18:44,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:18:44,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:18:44,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:18:44,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:44" (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 19:18:45,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:18:45,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:18:45,044 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 19:18:45,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:18:45,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:18:45,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 19:18:45,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 19:18:45,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:18:45,046 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:18:45,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:18:45,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:18:45,205 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:18:45,206 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 19:18:45,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:18:45 BoogieIcfgContainer [2019-10-13 19:18:45,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:18:45,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:18:45,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:18:45,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:18:45,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:18:44" (1/3) ... [2019-10-13 19:18:45,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf48d02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:18:45, skipping insertion in model container [2019-10-13 19:18:45,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:18:44" (2/3) ... [2019-10-13 19:18:45,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf48d02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:18:45, skipping insertion in model container [2019-10-13 19:18:45,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:18:45" (3/3) ... [2019-10-13 19:18:45,215 INFO L109 eAbstractionObserver]: Analyzing ICFG ps6.c [2019-10-13 19:18:45,224 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:18:45,233 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:18:45,245 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:18:45,270 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:18:45,270 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:18:45,270 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:18:45,271 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:18:45,271 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:18:45,271 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:18:45,271 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:18:45,271 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:18:45,285 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-13 19:18:45,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-13 19:18:45,289 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:45,290 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:45,292 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:45,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:45,296 INFO L82 PathProgramCache]: Analyzing trace with hash -148746498, now seen corresponding path program 1 times [2019-10-13 19:18:45,302 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:45,303 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928385708] [2019-10-13 19:18:45,303 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:45,303 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:45,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:45,401 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 19:18:45,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928385708] [2019-10-13 19:18:45,403 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:18:45,403 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 19:18:45,403 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924545123] [2019-10-13 19:18:45,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 19:18:45,407 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:45,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 19:18:45,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 19:18:45,423 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-10-13 19:18:45,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:45,442 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2019-10-13 19:18:45,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 19:18:45,443 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-13 19:18:45,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:45,452 INFO L225 Difference]: With dead ends: 37 [2019-10-13 19:18:45,453 INFO L226 Difference]: Without dead ends: 16 [2019-10-13 19:18:45,456 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 19:18:45,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-13 19:18:45,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-13 19:18:45,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-13 19:18:45,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-10-13 19:18:45,495 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-10-13 19:18:45,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:45,496 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-10-13 19:18:45,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 19:18:45,496 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-10-13 19:18:45,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-13 19:18:45,498 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:45,498 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:45,498 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:45,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:45,499 INFO L82 PathProgramCache]: Analyzing trace with hash -156194248, now seen corresponding path program 1 times [2019-10-13 19:18:45,499 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:45,499 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103308401] [2019-10-13 19:18:45,499 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:45,500 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:45,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:45,507 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:45,507 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675329417] [2019-10-13 19:18:45,508 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 19:18:45,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:45,545 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 19:18:45,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:45,625 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 19:18:45,626 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103308401] [2019-10-13 19:18:45,627 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:45,627 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675329417] [2019-10-13 19:18:45,628 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:18:45,628 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:18:45,628 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514656986] [2019-10-13 19:18:45,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:18:45,634 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:45,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:18:45,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:18:45,640 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-10-13 19:18:45,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:45,775 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-10-13 19:18:45,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:18:45,775 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-13 19:18:45,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:45,776 INFO L225 Difference]: With dead ends: 27 [2019-10-13 19:18:45,777 INFO L226 Difference]: Without dead ends: 23 [2019-10-13 19:18:45,778 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:18:45,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-13 19:18:45,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-13 19:18:45,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-13 19:18:45,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-13 19:18:45,788 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2019-10-13 19:18:45,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:45,788 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-13 19:18:45,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:18:45,788 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-13 19:18:45,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-13 19:18:45,789 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:45,790 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:45,993 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:45,994 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:45,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:45,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1425845280, now seen corresponding path program 1 times [2019-10-13 19:18:45,996 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:45,996 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996873692] [2019-10-13 19:18:45,997 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:45,997 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:45,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:46,003 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:46,003 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577220449] [2019-10-13 19:18:46,003 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 19:18:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:46,035 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-13 19:18:46,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:18:46,157 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996873692] [2019-10-13 19:18:46,158 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:46,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577220449] [2019-10-13 19:18:46,158 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:46,159 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-13 19:18:46,160 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116883785] [2019-10-13 19:18:46,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 19:18:46,160 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:46,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 19:18:46,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:18:46,161 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2019-10-13 19:18:46,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:46,479 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-10-13 19:18:46,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 19:18:46,480 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-10-13 19:18:46,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:46,482 INFO L225 Difference]: With dead ends: 34 [2019-10-13 19:18:46,482 INFO L226 Difference]: Without dead ends: 32 [2019-10-13 19:18:46,483 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:18:46,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-13 19:18:46,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-10-13 19:18:46,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-13 19:18:46,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-10-13 19:18:46,491 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 17 [2019-10-13 19:18:46,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:46,492 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-10-13 19:18:46,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 19:18:46,492 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-10-13 19:18:46,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 19:18:46,493 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:46,493 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:46,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:46,702 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:46,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:46,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1905380040, now seen corresponding path program 2 times [2019-10-13 19:18:46,704 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:46,704 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112654154] [2019-10-13 19:18:46,704 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:46,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:46,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:46,710 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:46,710 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140276325] [2019-10-13 19:18:46,711 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 19:18:46,743 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:18:46,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:46,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-13 19:18:46,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 19:18:46,852 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112654154] [2019-10-13 19:18:46,852 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:46,853 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140276325] [2019-10-13 19:18:46,853 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:46,853 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-13 19:18:46,853 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664296930] [2019-10-13 19:18:46,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 19:18:46,854 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:46,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 19:18:46,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:18:46,855 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 9 states. [2019-10-13 19:18:47,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:47,131 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2019-10-13 19:18:47,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 19:18:47,131 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-10-13 19:18:47,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:47,133 INFO L225 Difference]: With dead ends: 43 [2019-10-13 19:18:47,133 INFO L226 Difference]: Without dead ends: 41 [2019-10-13 19:18:47,134 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:18:47,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-13 19:18:47,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-10-13 19:18:47,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-13 19:18:47,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-10-13 19:18:47,143 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 24 [2019-10-13 19:18:47,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:47,144 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-10-13 19:18:47,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 19:18:47,144 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-10-13 19:18:47,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 19:18:47,145 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:47,145 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:47,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:47,348 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:47,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:47,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1054216485, now seen corresponding path program 1 times [2019-10-13 19:18:47,350 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:47,350 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739496330] [2019-10-13 19:18:47,350 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:47,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:47,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:47,356 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:47,356 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409625883] [2019-10-13 19:18:47,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:18:47,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-13 19:18:47,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:47,527 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:18:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 19:18:47,560 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739496330] [2019-10-13 19:18:47,560 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:18:47,560 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409625883] [2019-10-13 19:18:47,561 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:18:47,561 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-13 19:18:47,561 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581894128] [2019-10-13 19:18:47,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 19:18:47,563 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:18:47,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 19:18:47,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:18:47,564 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 10 states. [2019-10-13 19:18:47,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:18:47,897 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2019-10-13 19:18:47,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 19:18:47,898 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-10-13 19:18:47,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:18:47,901 INFO L225 Difference]: With dead ends: 46 [2019-10-13 19:18:47,901 INFO L226 Difference]: Without dead ends: 38 [2019-10-13 19:18:47,901 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:18:47,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-13 19:18:47,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-13 19:18:47,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-13 19:18:47,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-10-13 19:18:47,910 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 28 [2019-10-13 19:18:47,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:18:47,911 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-10-13 19:18:47,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 19:18:47,911 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-10-13 19:18:47,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-13 19:18:47,912 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:18:47,912 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:18:48,119 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:18:48,120 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:18:48,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:18:48,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1107083552, now seen corresponding path program 3 times [2019-10-13 19:18:48,121 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:18:48,121 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891213008] [2019-10-13 19:18:48,122 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:48,122 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:18:48,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:18:48,127 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:18:48,127 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [730811787] [2019-10-13 19:18:48,127 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 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 19:18:48,158 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-13 19:18:48,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:18:48,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 19:18:48,161 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:18:48,854 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:18:54,894 WARN L838 $PredicateComparison]: unable to prove that (or (= |c___VERIFIER_assert_#in~cond| 1) (and (= |c___VERIFIER_assert_#in~cond| 0) (exists ((v_main_~y~0_BEFORE_CALL_11 Int)) (let ((.cse1 (* v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11)) (.cse2 (* (* (* (* (* (* v_main_~y~0_BEFORE_CALL_11 (- 2)) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11)) (.cse0 (* (* (* (* (* v_main_~y~0_BEFORE_CALL_11 6) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11)) (.cse3 (* (* (* (* v_main_~y~0_BEFORE_CALL_11 5) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11))) (and (= (mod (+ (* .cse0 11) .cse1 .cse2 (* .cse3 11)) (- 12)) 0) (not (= (+ .cse1 .cse2 (* 12 (div (+ .cse1 .cse2 (- .cse0) (- .cse3)) (- 12)))) (+ .cse0 .cse3)))))))) is different from false [2019-10-13 19:19:00,928 WARN L838 $PredicateComparison]: unable to prove that (or (and (exists ((v_main_~y~0_BEFORE_CALL_11 Int)) (let ((.cse1 (* v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11)) (.cse2 (* (* (* (* (* (* v_main_~y~0_BEFORE_CALL_11 (- 2)) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11)) (.cse0 (* (* (* (* (* v_main_~y~0_BEFORE_CALL_11 6) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11)) (.cse3 (* (* (* (* v_main_~y~0_BEFORE_CALL_11 5) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11))) (and (= (mod (+ (* .cse0 11) .cse1 .cse2 (* .cse3 11)) (- 12)) 0) (not (= (+ .cse1 .cse2 (* 12 (div (+ .cse1 .cse2 (- .cse0) (- .cse3)) (- 12)))) (+ .cse0 .cse3)))))) (= 0 c___VERIFIER_assert_~cond)) (= 1 c___VERIFIER_assert_~cond)) is different from false [2019-10-13 19:19:06,966 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~y~0_BEFORE_CALL_11 Int)) (let ((.cse1 (* v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11)) (.cse2 (* (* (* (* (* (* v_main_~y~0_BEFORE_CALL_11 (- 2)) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11)) (.cse0 (* (* (* (* (* v_main_~y~0_BEFORE_CALL_11 6) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11)) (.cse3 (* (* (* (* v_main_~y~0_BEFORE_CALL_11 5) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11))) (and (= (mod (+ (* .cse0 11) .cse1 .cse2 (* .cse3 11)) (- 12)) 0) (not (= (+ .cse1 .cse2 (* 12 (div (+ .cse1 .cse2 (- .cse0) (- .cse3)) (- 12)))) (+ .cse0 .cse3)))))) is different from false [2019-10-13 19:19:08,968 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~y~0_BEFORE_CALL_11 Int)) (let ((.cse1 (* v_main_~y~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_11)) (.cse2 (* (* (* (* (* (* v_main_~y~0_BEFORE_CALL_11 (- 2)) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11)) (.cse0 (* (* (* (* (* v_main_~y~0_BEFORE_CALL_11 6) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11)) (.cse3 (* (* (* (* v_main_~y~0_BEFORE_CALL_11 5) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11) v_main_~y~0_BEFORE_CALL_11))) (and (= (mod (+ (* .cse0 11) .cse1 .cse2 (* .cse3 11)) (- 12)) 0) (not (= (+ .cse1 .cse2 (* 12 (div (+ .cse1 .cse2 (- .cse0) (- .cse3)) (- 12)))) (+ .cse0 .cse3)))))) is different from true [2019-10-13 19:19:08,975 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 1 not checked. [2019-10-13 19:19:08,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891213008] [2019-10-13 19:19:08,976 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:19:08,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730811787] [2019-10-13 19:19:08,977 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:19:08,977 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-13 19:19:08,978 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108910758] [2019-10-13 19:19:08,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 19:19:08,979 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:19:08,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 19:19:08,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=15, Unknown=4, NotChecked=24, Total=56 [2019-10-13 19:19:08,980 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2019-10-13 19:19:11,029 WARN L191 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 48 DAG size of output: 3 [2019-10-13 19:19:13,097 WARN L191 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 51 DAG size of output: 6 [2019-10-13 19:19:13,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:19:13,270 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2019-10-13 19:19:13,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 19:19:13,270 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2019-10-13 19:19:13,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:19:13,271 INFO L225 Difference]: With dead ends: 46 [2019-10-13 19:19:13,272 INFO L226 Difference]: Without dead ends: 44 [2019-10-13 19:19:13,272 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=26, Invalid=38, Unknown=4, NotChecked=42, Total=110 [2019-10-13 19:19:13,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-13 19:19:13,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2019-10-13 19:19:13,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-13 19:19:13,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-13 19:19:13,280 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 31 [2019-10-13 19:19:13,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:19:13,280 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-13 19:19:13,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 19:19:13,281 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-13 19:19:13,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-13 19:19:13,282 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:19:13,282 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:19:13,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:19:13,484 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:19:13,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:19:13,484 INFO L82 PathProgramCache]: Analyzing trace with hash 787245325, now seen corresponding path program 2 times [2019-10-13 19:19:13,485 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:19:13,485 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491246590] [2019-10-13 19:19:13,486 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:13,486 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:13,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:19:13,491 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:19:13,491 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843944732] [2019-10-13 19:19:13,491 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 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 19:19:13,526 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:19:13,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:19:13,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-13 19:19:13,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:19:13,604 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:19:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 19:19:13,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491246590] [2019-10-13 19:19:13,630 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:19:13,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843944732] [2019-10-13 19:19:13,630 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:19:13,631 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-13 19:19:13,631 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242020792] [2019-10-13 19:19:13,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 19:19:13,632 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:19:13,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 19:19:13,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:19:13,632 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 10 states. [2019-10-13 19:19:13,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:19:13,812 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2019-10-13 19:19:13,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:19:13,813 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2019-10-13 19:19:13,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:19:13,814 INFO L225 Difference]: With dead ends: 43 [2019-10-13 19:19:13,814 INFO L226 Difference]: Without dead ends: 35 [2019-10-13 19:19:13,814 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:19:13,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-13 19:19:13,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-13 19:19:13,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-13 19:19:13,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2019-10-13 19:19:13,822 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 35 [2019-10-13 19:19:13,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:19:13,822 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2019-10-13 19:19:13,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 19:19:13,822 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2019-10-13 19:19:13,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 19:19:13,824 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:19:13,824 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:19:14,027 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:19:14,028 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:19:14,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:19:14,029 INFO L82 PathProgramCache]: Analyzing trace with hash -999891931, now seen corresponding path program 3 times [2019-10-13 19:19:14,029 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:19:14,030 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763775787] [2019-10-13 19:19:14,030 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:14,030 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:14,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:19:14,035 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:19:14,035 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076274115] [2019-10-13 19:19:14,035 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 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 19:19:14,073 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-13 19:19:14,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:19:14,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-13 19:19:14,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:19:15,074 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:19:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 19:19:15,100 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763775787] [2019-10-13 19:19:15,100 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:19:15,101 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076274115] [2019-10-13 19:19:15,101 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:19:15,101 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-13 19:19:15,101 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630621916] [2019-10-13 19:19:15,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 19:19:15,102 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:19:15,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 19:19:15,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:19:15,103 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 12 states. [2019-10-13 19:19:15,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:19:15,294 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2019-10-13 19:19:15,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 19:19:15,295 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2019-10-13 19:19:15,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:19:15,296 INFO L225 Difference]: With dead ends: 46 [2019-10-13 19:19:15,296 INFO L226 Difference]: Without dead ends: 38 [2019-10-13 19:19:15,296 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:19:15,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-13 19:19:15,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-13 19:19:15,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-13 19:19:15,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-10-13 19:19:15,305 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 42 [2019-10-13 19:19:15,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:19:15,305 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-10-13 19:19:15,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 19:19:15,306 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-10-13 19:19:15,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-13 19:19:15,307 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:19:15,307 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:19:15,512 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:19:15,513 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:19:15,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:19:15,514 INFO L82 PathProgramCache]: Analyzing trace with hash -705610227, now seen corresponding path program 4 times [2019-10-13 19:19:15,514 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:19:15,514 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502887886] [2019-10-13 19:19:15,515 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:15,515 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:15,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:19:15,521 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:19:15,521 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388089887] [2019-10-13 19:19:15,521 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 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 19:19:15,561 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:19:15,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:19:15,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-13 19:19:15,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:19:15,670 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:19:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 11 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-13 19:19:15,697 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502887886] [2019-10-13 19:19:15,697 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:19:15,698 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388089887] [2019-10-13 19:19:15,698 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:19:15,698 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-13 19:19:15,698 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271413693] [2019-10-13 19:19:15,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 19:19:15,699 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:19:15,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 19:19:15,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:19:15,699 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 12 states. [2019-10-13 19:19:15,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:19:15,896 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2019-10-13 19:19:15,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 19:19:15,897 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-10-13 19:19:15,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:19:15,900 INFO L225 Difference]: With dead ends: 49 [2019-10-13 19:19:15,900 INFO L226 Difference]: Without dead ends: 41 [2019-10-13 19:19:15,900 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:19:15,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-13 19:19:15,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-13 19:19:15,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-13 19:19:15,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2019-10-13 19:19:15,921 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 49 [2019-10-13 19:19:15,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:19:15,922 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2019-10-13 19:19:15,922 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 19:19:15,922 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2019-10-13 19:19:15,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-13 19:19:15,923 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:19:15,923 INFO L380 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:19:16,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:19:16,125 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:19:16,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:19:16,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1261987621, now seen corresponding path program 5 times [2019-10-13 19:19:16,126 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:19:16,126 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451374001] [2019-10-13 19:19:16,126 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:16,127 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:16,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:19:16,131 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:19:16,131 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602249329] [2019-10-13 19:19:16,132 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 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 19:19:16,198 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-13 19:19:16,198 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:19:16,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-13 19:19:16,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:19:18,296 WARN L860 $PredicateComparison]: unable to prove that (and (= 0 (mod (+ (* (* (* (* (* (* c_main_~y~0 (- 2)) c_main_~y~0) c_main_~y~0) c_main_~y~0) c_main_~y~0) c_main_~y~0) (* (* (* (* (* c_main_~y~0 5) c_main_~y~0) c_main_~y~0) c_main_~y~0) 11) (* c_main_~y~0 c_main_~y~0) (* (* (* (* (* (* c_main_~y~0 6) c_main_~y~0) c_main_~y~0) c_main_~y~0) c_main_~y~0) 11)) (- 12))) (= c_main_~c~0 1) (= c_main_~y~0 1)) is different from true [2019-10-13 19:19:18,376 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:19:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 5 not checked. [2019-10-13 19:19:18,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451374001] [2019-10-13 19:19:18,410 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:19:18,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602249329] [2019-10-13 19:19:18,410 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:19:18,411 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-13 19:19:18,411 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167326646] [2019-10-13 19:19:18,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 19:19:18,413 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:19:18,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 19:19:18,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=133, Unknown=1, NotChecked=22, Total=182 [2019-10-13 19:19:18,413 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 14 states. [2019-10-13 19:19:18,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:19:18,621 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2019-10-13 19:19:18,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 19:19:18,622 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2019-10-13 19:19:18,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:19:18,623 INFO L225 Difference]: With dead ends: 52 [2019-10-13 19:19:18,623 INFO L226 Difference]: Without dead ends: 44 [2019-10-13 19:19:18,623 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=41, Invalid=202, Unknown=1, NotChecked=28, Total=272 [2019-10-13 19:19:18,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-13 19:19:18,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-13 19:19:18,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-13 19:19:18,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-10-13 19:19:18,632 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 56 [2019-10-13 19:19:18,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:19:18,632 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-10-13 19:19:18,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 19:19:18,633 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-10-13 19:19:18,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-13 19:19:18,634 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:19:18,634 INFO L380 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:19:18,845 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:19:18,845 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:19:18,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:19:18,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1969050381, now seen corresponding path program 6 times [2019-10-13 19:19:18,846 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:19:18,846 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740584863] [2019-10-13 19:19:18,846 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:18,846 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:18,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:19:18,851 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:19:18,851 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411557932] [2019-10-13 19:19:18,852 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 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 19:19:19,174 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-13 19:19:19,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:19:19,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 42 conjunts are in the unsatisfiable core [2019-10-13 19:19:19,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:19:19,349 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:19:19,379 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-13 19:19:19,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740584863] [2019-10-13 19:19:19,380 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:19:19,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411557932] [2019-10-13 19:19:19,380 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:19:19,380 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-13 19:19:19,381 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889146498] [2019-10-13 19:19:19,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 19:19:19,381 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:19:19,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 19:19:19,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:19:19,382 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 15 states. [2019-10-13 19:19:19,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:19:19,686 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2019-10-13 19:19:19,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 19:19:19,687 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2019-10-13 19:19:19,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:19:19,688 INFO L225 Difference]: With dead ends: 55 [2019-10-13 19:19:19,688 INFO L226 Difference]: Without dead ends: 47 [2019-10-13 19:19:19,689 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-10-13 19:19:19,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-13 19:19:19,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-10-13 19:19:19,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-13 19:19:19,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2019-10-13 19:19:19,697 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 63 [2019-10-13 19:19:19,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:19:19,698 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2019-10-13 19:19:19,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 19:19:19,698 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2019-10-13 19:19:19,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-13 19:19:19,699 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:19:19,699 INFO L380 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:19:19,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:19:19,903 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:19:19,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:19:19,904 INFO L82 PathProgramCache]: Analyzing trace with hash 855290405, now seen corresponding path program 7 times [2019-10-13 19:19:19,904 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:19:19,905 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885275792] [2019-10-13 19:19:19,905 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:19,905 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:19,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:19:19,910 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:19:19,910 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755775340] [2019-10-13 19:19:19,910 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 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 19:19:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:19,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 65 conjunts are in the unsatisfiable core [2019-10-13 19:19:19,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:19:21,676 WARN L191 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 43 DAG size of output: 9 [2019-10-13 19:19:21,725 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:19:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 34 proven. 110 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-13 19:19:21,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885275792] [2019-10-13 19:19:21,761 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:19:21,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755775340] [2019-10-13 19:19:21,761 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:19:21,762 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-10-13 19:19:21,762 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257744859] [2019-10-13 19:19:21,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 19:19:21,762 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:19:21,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 19:19:21,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2019-10-13 19:19:21,763 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 16 states. [2019-10-13 19:19:25,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:19:25,843 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2019-10-13 19:19:25,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 19:19:25,844 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2019-10-13 19:19:25,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:19:25,846 INFO L225 Difference]: With dead ends: 60 [2019-10-13 19:19:25,846 INFO L226 Difference]: Without dead ends: 54 [2019-10-13 19:19:25,847 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2019-10-13 19:19:25,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-13 19:19:25,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-10-13 19:19:25,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-13 19:19:25,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2019-10-13 19:19:25,856 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 70 [2019-10-13 19:19:25,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:19:25,857 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2019-10-13 19:19:25,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 19:19:25,857 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2019-10-13 19:19:25,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-13 19:19:25,858 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:19:25,858 INFO L380 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:19:26,062 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:19:26,063 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:19:26,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:19:26,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1484740595, now seen corresponding path program 8 times [2019-10-13 19:19:26,064 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:19:26,064 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760723097] [2019-10-13 19:19:26,064 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:26,064 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:26,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:19:26,069 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:19:26,069 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037433434] [2019-10-13 19:19:26,070 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:19:26,120 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:19:26,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:19:26,122 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 48 conjunts are in the unsatisfiable core [2019-10-13 19:19:26,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:19:26,269 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:19:26,314 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 19 proven. 136 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-10-13 19:19:26,314 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760723097] [2019-10-13 19:19:26,314 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:19:26,314 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037433434] [2019-10-13 19:19:26,315 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:19:26,315 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-10-13 19:19:26,315 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035516152] [2019-10-13 19:19:26,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 19:19:26,315 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:19:26,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 19:19:26,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2019-10-13 19:19:26,316 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 16 states. [2019-10-13 19:19:26,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:19:26,652 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2019-10-13 19:19:26,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 19:19:26,653 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 77 [2019-10-13 19:19:26,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:19:26,654 INFO L225 Difference]: With dead ends: 65 [2019-10-13 19:19:26,654 INFO L226 Difference]: Without dead ends: 57 [2019-10-13 19:19:26,656 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2019-10-13 19:19:26,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-13 19:19:26,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-10-13 19:19:26,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-13 19:19:26,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2019-10-13 19:19:26,665 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 77 [2019-10-13 19:19:26,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:19:26,666 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2019-10-13 19:19:26,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 19:19:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2019-10-13 19:19:26,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-10-13 19:19:26,667 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:19:26,668 INFO L380 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:19:26,873 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:19:26,874 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:19:26,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:19:26,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1487028955, now seen corresponding path program 9 times [2019-10-13 19:19:26,874 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:19:26,875 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038820230] [2019-10-13 19:19:26,875 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:26,875 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:26,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:19:26,881 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:19:26,881 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745290370] [2019-10-13 19:19:26,881 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:19:26,951 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-13 19:19:26,951 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:19:26,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 54 conjunts are in the unsatisfiable core [2019-10-13 19:19:26,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:19:27,112 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:19:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 21 proven. 166 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-10-13 19:19:27,149 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038820230] [2019-10-13 19:19:27,149 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:19:27,149 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745290370] [2019-10-13 19:19:27,149 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:19:27,149 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-10-13 19:19:27,149 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936441238] [2019-10-13 19:19:27,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 19:19:27,150 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:19:27,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 19:19:27,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-10-13 19:19:27,151 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 18 states. [2019-10-13 19:19:27,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:19:27,555 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2019-10-13 19:19:27,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 19:19:27,555 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 84 [2019-10-13 19:19:27,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:19:27,557 INFO L225 Difference]: With dead ends: 68 [2019-10-13 19:19:27,557 INFO L226 Difference]: Without dead ends: 60 [2019-10-13 19:19:27,558 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2019-10-13 19:19:27,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-13 19:19:27,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-10-13 19:19:27,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-13 19:19:27,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2019-10-13 19:19:27,567 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 84 [2019-10-13 19:19:27,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:19:27,568 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2019-10-13 19:19:27,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 19:19:27,568 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2019-10-13 19:19:27,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-13 19:19:27,569 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:19:27,570 INFO L380 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:19:27,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:19:27,774 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:19:27,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:19:27,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1163182835, now seen corresponding path program 10 times [2019-10-13 19:19:27,775 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:19:27,775 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079192140] [2019-10-13 19:19:27,776 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:27,776 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:27,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:19:27,783 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:19:27,783 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736319384] [2019-10-13 19:19:27,783 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:19:27,850 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:19:27,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:19:27,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 56 conjunts are in the unsatisfiable core [2019-10-13 19:19:27,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:19:29,919 WARN L860 $PredicateComparison]: unable to prove that (and (= c_main_~y~0 0) (= 0 (mod (+ (* (* (* (* (* (* c_main_~y~0 (- 2)) c_main_~y~0) c_main_~y~0) c_main_~y~0) c_main_~y~0) c_main_~y~0) (* (* (* (* (* c_main_~y~0 5) c_main_~y~0) c_main_~y~0) c_main_~y~0) 11) (* c_main_~y~0 c_main_~y~0) (* (* (* (* (* (* c_main_~y~0 6) c_main_~y~0) c_main_~y~0) c_main_~y~0) c_main_~y~0) 11)) (- 12))) (= c_main_~c~0 0)) is different from true [2019-10-13 19:19:32,068 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:19:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 23 proven. 189 refuted. 0 times theorem prover too weak. 231 trivial. 10 not checked. [2019-10-13 19:19:32,106 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079192140] [2019-10-13 19:19:32,106 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:19:32,106 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736319384] [2019-10-13 19:19:32,106 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:19:32,107 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-10-13 19:19:32,107 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351229687] [2019-10-13 19:19:32,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 19:19:32,107 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:19:32,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 19:19:32,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=272, Unknown=2, NotChecked=32, Total=342 [2019-10-13 19:19:32,108 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 19 states. [2019-10-13 19:19:32,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:19:32,499 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-10-13 19:19:32,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 19:19:32,500 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2019-10-13 19:19:32,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:19:32,501 INFO L225 Difference]: With dead ends: 71 [2019-10-13 19:19:32,502 INFO L226 Difference]: Without dead ends: 63 [2019-10-13 19:19:32,503 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=51, Invalid=371, Unknown=2, NotChecked=38, Total=462 [2019-10-13 19:19:32,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-13 19:19:32,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-10-13 19:19:32,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-13 19:19:32,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2019-10-13 19:19:32,512 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 91 [2019-10-13 19:19:32,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:19:32,512 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2019-10-13 19:19:32,512 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 19:19:32,513 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2019-10-13 19:19:32,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-13 19:19:32,514 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:19:32,514 INFO L380 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:19:32,723 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:19:32,724 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:19:32,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:19:32,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1609463771, now seen corresponding path program 11 times [2019-10-13 19:19:32,725 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:19:32,725 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498065024] [2019-10-13 19:19:32,725 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:32,725 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:32,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:19:32,732 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:19:32,732 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281300697] [2019-10-13 19:19:32,732 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:19:32,868 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-13 19:19:32,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:19:32,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 60 conjunts are in the unsatisfiable core [2019-10-13 19:19:32,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:19:33,070 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:19:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 31 proven. 229 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-10-13 19:19:33,110 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498065024] [2019-10-13 19:19:33,110 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:19:33,111 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281300697] [2019-10-13 19:19:33,111 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:19:33,111 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-10-13 19:19:33,111 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323771159] [2019-10-13 19:19:33,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 19:19:33,112 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:19:33,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 19:19:33,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2019-10-13 19:19:33,112 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 19 states. [2019-10-13 19:19:33,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:19:33,544 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2019-10-13 19:19:33,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 19:19:33,544 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2019-10-13 19:19:33,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:19:33,545 INFO L225 Difference]: With dead ends: 74 [2019-10-13 19:19:33,545 INFO L226 Difference]: Without dead ends: 66 [2019-10-13 19:19:33,546 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2019-10-13 19:19:33,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-13 19:19:33,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-10-13 19:19:33,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-13 19:19:33,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2019-10-13 19:19:33,560 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 98 [2019-10-13 19:19:33,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:19:33,561 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2019-10-13 19:19:33,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 19:19:33,561 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2019-10-13 19:19:33,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-13 19:19:33,563 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:19:33,563 INFO L380 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:19:33,767 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:19:33,768 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:19:33,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:19:33,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1322446323, now seen corresponding path program 12 times [2019-10-13 19:19:33,769 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:19:33,769 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769544717] [2019-10-13 19:19:33,770 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:33,770 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:33,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:19:33,775 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:19:33,776 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988856889] [2019-10-13 19:19:33,776 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:19:34,805 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-13 19:19:34,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:19:34,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 66 conjunts are in the unsatisfiable core [2019-10-13 19:19:34,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:19:35,045 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:19:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 27 proven. 274 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-10-13 19:19:35,099 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769544717] [2019-10-13 19:19:35,099 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:19:35,100 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988856889] [2019-10-13 19:19:35,100 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:19:35,100 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-10-13 19:19:35,100 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811710076] [2019-10-13 19:19:35,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 19:19:35,101 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:19:35,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 19:19:35,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-10-13 19:19:35,101 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand 21 states. [2019-10-13 19:19:35,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:19:35,597 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2019-10-13 19:19:35,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 19:19:35,602 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2019-10-13 19:19:35,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:19:35,603 INFO L225 Difference]: With dead ends: 77 [2019-10-13 19:19:35,603 INFO L226 Difference]: Without dead ends: 69 [2019-10-13 19:19:35,604 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2019-10-13 19:19:35,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-13 19:19:35,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-10-13 19:19:35,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-13 19:19:35,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2019-10-13 19:19:35,615 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 105 [2019-10-13 19:19:35,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:19:35,617 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2019-10-13 19:19:35,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 19:19:35,617 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2019-10-13 19:19:35,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-13 19:19:35,619 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:19:35,620 INFO L380 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:19:35,824 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:19:35,825 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:19:35,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:19:35,825 INFO L82 PathProgramCache]: Analyzing trace with hash -523889883, now seen corresponding path program 13 times [2019-10-13 19:19:35,826 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:19:35,826 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712853414] [2019-10-13 19:19:35,827 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:35,827 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:19:35,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:19:35,831 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:19:35,831 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526615671] [2019-10-13 19:19:35,832 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:19:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:19:35,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 101 conjunts are in the unsatisfiable core [2019-10-13 19:19:35,898 INFO L279 TraceCheckSpWp]: Computing forward predicates...