/usr/bin/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/prod4br.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:26:31,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:26:31,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:26:31,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:26:31,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:26:31,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:26:31,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:26:31,287 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:26:31,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:26:31,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:26:31,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:26:31,291 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-11-06 21:26:31,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:26:31,331 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:26:31,332 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:26:31,332 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 [2019-11-06 21:26:31,358 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:26:31,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:26:31,360 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:26:31,360 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:26:31,360 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:26:31,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:26:31,361 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:26:31,361 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:26:31,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:26:31,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:26:31,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:26:31,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:26:31,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:26:31,363 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:26:31,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:26:31,364 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:26:31,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:26:31,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:26:31,364 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:26:31,364 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:26:31,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:26:31,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:26:31,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:26:31,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:26:31,365 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:26:31,366 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:26:31,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:26:31,366 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:26:31,366 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:26:31,628 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:26:31,644 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:26:31,648 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:26:31,650 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:26:31,650 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:26:31,651 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/prod4br.c [2019-11-06 21:26:31,725 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12c17946b/748d2b0d582f4d33b4a3b8606deb819d/FLAGe75121d71 [2019-11-06 21:26:32,194 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:26:32,195 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/prod4br.c [2019-11-06 21:26:32,204 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12c17946b/748d2b0d582f4d33b4a3b8606deb819d/FLAGe75121d71 [2019-11-06 21:26:32,577 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12c17946b/748d2b0d582f4d33b4a3b8606deb819d [2019-11-06 21:26:32,587 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:26:32,588 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:26:32,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:26:32,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:26:32,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:26:32,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:26:32" (1/1) ... [2019-11-06 21:26:32,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f1edfd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:32, skipping insertion in model container [2019-11-06 21:26:32,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:26:32" (1/1) ... [2019-11-06 21:26:32,604 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:26:32,623 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:26:32,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:26:32,806 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:26:32,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:26:32,842 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:26:32,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:32 WrapperNode [2019-11-06 21:26:32,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:26:32,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:26:32,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:26:32,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:26:32,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:32" (1/1) ... [2019-11-06 21:26:32,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:32" (1/1) ... [2019-11-06 21:26:32,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:32" (1/1) ... [2019-11-06 21:26:32,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:32" (1/1) ... [2019-11-06 21:26:32,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:32" (1/1) ... [2019-11-06 21:26:32,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:32" (1/1) ... [2019-11-06 21:26:32,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:32" (1/1) ... [2019-11-06 21:26:32,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:26:32,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:26:32,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:26:32,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:26:32,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:32" (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 [2019-11-06 21:26:33,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:26:33,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:26:33,040 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 21:26:33,040 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:26:33,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:26:33,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 21:26:33,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 21:26:33,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 21:26:33,041 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:26:33,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:26:33,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:26:33,260 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:26:33,260 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 21:26:33,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:26:33 BoogieIcfgContainer [2019-11-06 21:26:33,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:26:33,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:26:33,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:26:33,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:26:33,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:26:32" (1/3) ... [2019-11-06 21:26:33,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa7b161 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:26:33, skipping insertion in model container [2019-11-06 21:26:33,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:26:32" (2/3) ... [2019-11-06 21:26:33,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa7b161 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:26:33, skipping insertion in model container [2019-11-06 21:26:33,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:26:33" (3/3) ... [2019-11-06 21:26:33,270 INFO L109 eAbstractionObserver]: Analyzing ICFG prod4br.c [2019-11-06 21:26:33,279 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:26:33,287 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:26:33,296 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:26:33,325 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:26:33,325 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:26:33,325 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:26:33,326 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:26:33,326 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:26:33,326 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:26:33,326 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:26:33,326 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:26:33,342 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-11-06 21:26:33,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-06 21:26:33,348 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:33,348 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:33,350 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:33,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:33,354 INFO L82 PathProgramCache]: Analyzing trace with hash 152624894, now seen corresponding path program 1 times [2019-11-06 21:26:33,361 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:33,362 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662243881] [2019-11-06 21:26:33,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:33,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:26:33,465 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662243881] [2019-11-06 21:26:33,466 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:26:33,466 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-06 21:26:33,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305059607] [2019-11-06 21:26:33,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-06 21:26:33,473 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:33,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-06 21:26:33,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 21:26:33,490 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2019-11-06 21:26:33,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:33,513 INFO L93 Difference]: Finished difference Result 43 states and 62 transitions. [2019-11-06 21:26:33,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-06 21:26:33,515 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-06 21:26:33,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:33,525 INFO L225 Difference]: With dead ends: 43 [2019-11-06 21:26:33,525 INFO L226 Difference]: Without dead ends: 19 [2019-11-06 21:26:33,529 INFO L630 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 [2019-11-06 21:26:33,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-06 21:26:33,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-06 21:26:33,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-06 21:26:33,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2019-11-06 21:26:33,573 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2019-11-06 21:26:33,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:33,573 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-11-06 21:26:33,574 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-06 21:26:33,574 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2019-11-06 21:26:33,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-06 21:26:33,576 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:33,576 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:33,576 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:33,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:33,577 INFO L82 PathProgramCache]: Analyzing trace with hash 130400808, now seen corresponding path program 1 times [2019-11-06 21:26:33,577 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:33,578 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327446558] [2019-11-06 21:26:33,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:33,588 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:33,588 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286000112] [2019-11-06 21:26:33,589 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 [2019-11-06 21:26:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:33,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 21:26:33,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:33,822 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2019-11-06 21:26:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:26:33,850 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327446558] [2019-11-06 21:26:33,850 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:33,850 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286000112] [2019-11-06 21:26:33,851 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:26:33,851 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 21:26:33,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138202906] [2019-11-06 21:26:33,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 21:26:33,854 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:33,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 21:26:33,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 21:26:33,855 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 5 states. [2019-11-06 21:26:33,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:33,994 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-11-06 21:26:33,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 21:26:33,997 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-06 21:26:33,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:33,998 INFO L225 Difference]: With dead ends: 33 [2019-11-06 21:26:33,998 INFO L226 Difference]: Without dead ends: 31 [2019-11-06 21:26:33,999 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:26:34,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-06 21:26:34,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2019-11-06 21:26:34,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-06 21:26:34,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2019-11-06 21:26:34,013 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 10 [2019-11-06 21:26:34,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:34,013 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2019-11-06 21:26:34,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 21:26:34,014 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2019-11-06 21:26:34,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 21:26:34,015 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:34,015 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:34,219 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:34,219 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:34,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:34,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1836845457, now seen corresponding path program 1 times [2019-11-06 21:26:34,222 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:34,223 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505126299] [2019-11-06 21:26:34,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:34,237 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:34,238 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694079050] [2019-11-06 21:26:34,238 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 [2019-11-06 21:26:34,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:34,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-06 21:26:34,327 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:34,399 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:26:34,464 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505126299] [2019-11-06 21:26:34,464 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:34,464 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694079050] [2019-11-06 21:26:34,464 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:34,465 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 21:26:34,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6969823] [2019-11-06 21:26:34,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:26:34,466 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:34,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:26:34,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:26:34,467 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 9 states. [2019-11-06 21:26:34,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:34,918 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2019-11-06 21:26:34,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 21:26:34,919 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-11-06 21:26:34,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:34,922 INFO L225 Difference]: With dead ends: 39 [2019-11-06 21:26:34,922 INFO L226 Difference]: Without dead ends: 37 [2019-11-06 21:26:34,923 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:26:34,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-06 21:26:34,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2019-11-06 21:26:34,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 21:26:34,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2019-11-06 21:26:34,934 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 16 [2019-11-06 21:26:34,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:34,935 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2019-11-06 21:26:34,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:26:34,935 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2019-11-06 21:26:34,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 21:26:34,937 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:34,938 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:35,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:35,145 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:35,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:35,146 INFO L82 PathProgramCache]: Analyzing trace with hash 682822634, now seen corresponding path program 1 times [2019-11-06 21:26:35,146 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:35,146 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236781432] [2019-11-06 21:26:35,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:35,156 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:35,157 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807396321] [2019-11-06 21:26:35,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:35,199 WARN L254 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-06 21:26:35,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:35,379 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:26:35,411 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236781432] [2019-11-06 21:26:35,412 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:35,412 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807396321] [2019-11-06 21:26:35,412 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:35,412 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 21:26:35,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348608263] [2019-11-06 21:26:35,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:26:35,414 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:35,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:26:35,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:26:35,415 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 9 states. [2019-11-06 21:26:35,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:35,748 INFO L93 Difference]: Finished difference Result 55 states and 74 transitions. [2019-11-06 21:26:35,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 21:26:35,749 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2019-11-06 21:26:35,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:35,751 INFO L225 Difference]: With dead ends: 55 [2019-11-06 21:26:35,751 INFO L226 Difference]: Without dead ends: 53 [2019-11-06 21:26:35,751 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:26:35,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-06 21:26:35,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2019-11-06 21:26:35,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-06 21:26:35,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2019-11-06 21:26:35,763 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 18 [2019-11-06 21:26:35,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:35,763 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2019-11-06 21:26:35,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:26:35,764 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2019-11-06 21:26:35,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 21:26:35,765 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:35,765 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:35,970 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:35,971 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:35,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:35,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1827366173, now seen corresponding path program 1 times [2019-11-06 21:26:35,972 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:35,972 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001575461] [2019-11-06 21:26:35,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:35,984 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:35,984 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595941190] [2019-11-06 21:26:35,985 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 [2019-11-06 21:26:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:36,023 WARN L254 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-06 21:26:36,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:36,469 WARN L191 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2019-11-06 21:26:36,474 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:26:36,499 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001575461] [2019-11-06 21:26:36,499 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:36,500 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595941190] [2019-11-06 21:26:36,500 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:36,500 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 21:26:36,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128987365] [2019-11-06 21:26:36,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:26:36,503 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:36,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:26:36,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:26:36,504 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 9 states. [2019-11-06 21:26:36,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:36,878 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2019-11-06 21:26:36,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 21:26:36,879 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2019-11-06 21:26:36,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:36,880 INFO L225 Difference]: With dead ends: 75 [2019-11-06 21:26:36,880 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 21:26:36,882 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:26:36,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 21:26:36,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2019-11-06 21:26:36,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-06 21:26:36,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2019-11-06 21:26:36,891 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 19 [2019-11-06 21:26:36,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:36,892 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2019-11-06 21:26:36,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:26:36,892 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2019-11-06 21:26:36,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 21:26:36,893 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:36,893 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:37,101 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:37,102 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:37,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:37,103 INFO L82 PathProgramCache]: Analyzing trace with hash 560958013, now seen corresponding path program 1 times [2019-11-06 21:26:37,103 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:37,103 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140908608] [2019-11-06 21:26:37,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:37,111 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:37,111 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589556379] [2019-11-06 21:26:37,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:37,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 21:26:37,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 21:26:37,200 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140908608] [2019-11-06 21:26:37,201 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:37,201 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589556379] [2019-11-06 21:26:37,202 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:26:37,202 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 21:26:37,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395085547] [2019-11-06 21:26:37,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 21:26:37,206 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:37,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 21:26:37,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:26:37,206 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 6 states. [2019-11-06 21:26:37,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:37,296 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2019-11-06 21:26:37,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 21:26:37,297 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-11-06 21:26:37,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:37,298 INFO L225 Difference]: With dead ends: 61 [2019-11-06 21:26:37,298 INFO L226 Difference]: Without dead ends: 49 [2019-11-06 21:26:37,298 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:26:37,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-06 21:26:37,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-11-06 21:26:37,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-06 21:26:37,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2019-11-06 21:26:37,307 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 21 [2019-11-06 21:26:37,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:37,307 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2019-11-06 21:26:37,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 21:26:37,307 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2019-11-06 21:26:37,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 21:26:37,308 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:37,308 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:37,512 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:37,512 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:37,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:37,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1203344027, now seen corresponding path program 1 times [2019-11-06 21:26:37,513 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:37,514 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995151147] [2019-11-06 21:26:37,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:37,520 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:37,520 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447710082] [2019-11-06 21:26:37,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:37,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:37,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 21:26:37,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:37,654 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:26:37,671 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995151147] [2019-11-06 21:26:37,671 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:37,671 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447710082] [2019-11-06 21:26:37,672 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:37,672 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 21:26:37,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468955185] [2019-11-06 21:26:37,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:26:37,672 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:37,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:26:37,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:26:37,673 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 9 states. [2019-11-06 21:26:38,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:38,057 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2019-11-06 21:26:38,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 21:26:38,057 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2019-11-06 21:26:38,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:38,058 INFO L225 Difference]: With dead ends: 75 [2019-11-06 21:26:38,059 INFO L226 Difference]: Without dead ends: 61 [2019-11-06 21:26:38,059 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:26:38,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-06 21:26:38,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2019-11-06 21:26:38,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-06 21:26:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2019-11-06 21:26:38,068 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 20 [2019-11-06 21:26:38,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:38,068 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2019-11-06 21:26:38,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:26:38,069 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2019-11-06 21:26:38,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 21:26:38,070 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:38,070 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:38,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:38,273 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:38,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:38,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1146085725, now seen corresponding path program 1 times [2019-11-06 21:26:38,274 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:38,275 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726338607] [2019-11-06 21:26:38,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:38,280 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:38,280 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112300145] [2019-11-06 21:26:38,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:38,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:38,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 21:26:38,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:38,567 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2019-11-06 21:26:38,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:38,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:26:38,723 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726338607] [2019-11-06 21:26:38,723 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:38,723 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112300145] [2019-11-06 21:26:38,724 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:38,724 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 21:26:38,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200629808] [2019-11-06 21:26:38,724 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:26:38,725 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:38,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:26:38,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:26:38,725 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand 10 states. [2019-11-06 21:26:39,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:39,595 INFO L93 Difference]: Finished difference Result 85 states and 111 transitions. [2019-11-06 21:26:39,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 21:26:39,597 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2019-11-06 21:26:39,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:39,599 INFO L225 Difference]: With dead ends: 85 [2019-11-06 21:26:39,599 INFO L226 Difference]: Without dead ends: 71 [2019-11-06 21:26:39,600 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:26:39,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-06 21:26:39,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2019-11-06 21:26:39,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-06 21:26:39,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2019-11-06 21:26:39,609 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 20 [2019-11-06 21:26:39,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:39,610 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2019-11-06 21:26:39,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:26:39,610 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2019-11-06 21:26:39,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 21:26:39,611 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:39,611 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:39,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:39,825 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:39,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:39,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1259300529, now seen corresponding path program 1 times [2019-11-06 21:26:39,826 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:39,826 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158367548] [2019-11-06 21:26:39,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:39,831 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:39,831 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202288372] [2019-11-06 21:26:39,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:39,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:39,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 21:26:39,865 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:39,875 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:39,875 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:39,876 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:39,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:39,878 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:40,604 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:41,119 WARN L191 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 16 [2019-11-06 21:26:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:26:41,140 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158367548] [2019-11-06 21:26:41,140 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:41,140 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202288372] [2019-11-06 21:26:41,141 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:41,141 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 21:26:41,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038191375] [2019-11-06 21:26:41,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:26:41,142 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:41,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:26:41,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=70, Unknown=1, NotChecked=0, Total=90 [2019-11-06 21:26:41,142 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand 10 states. [2019-11-06 21:26:47,435 WARN L191 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2019-11-06 21:26:48,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:48,199 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2019-11-06 21:26:48,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 21:26:48,200 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2019-11-06 21:26:48,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:48,201 INFO L225 Difference]: With dead ends: 81 [2019-11-06 21:26:48,202 INFO L226 Difference]: Without dead ends: 74 [2019-11-06 21:26:48,202 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=45, Invalid=163, Unknown=2, NotChecked=0, Total=210 [2019-11-06 21:26:48,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-06 21:26:48,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-11-06 21:26:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-06 21:26:48,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2019-11-06 21:26:48,213 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 24 [2019-11-06 21:26:48,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:48,214 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2019-11-06 21:26:48,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:26:48,214 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2019-11-06 21:26:48,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 21:26:48,216 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:48,216 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:48,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:48,420 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:48,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:48,420 INFO L82 PathProgramCache]: Analyzing trace with hash -333220948, now seen corresponding path program 2 times [2019-11-06 21:26:48,421 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:48,421 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366597115] [2019-11-06 21:26:48,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:48,426 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:48,426 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734825814] [2019-11-06 21:26:48,427 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:48,460 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:26:48,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:26:48,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-06 21:26:48,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:48,476 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:48,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:50,673 WARN L191 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 29 [2019-11-06 21:26:50,678 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:50,679 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:50,680 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:50,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:50,683 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:50,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:50,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 7 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:26:50,893 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366597115] [2019-11-06 21:26:50,893 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:50,893 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734825814] [2019-11-06 21:26:50,893 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:50,893 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 21:26:50,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434161393] [2019-11-06 21:26:50,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:26:50,903 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:50,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:26:50,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=70, Unknown=1, NotChecked=0, Total=90 [2019-11-06 21:26:50,904 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand 10 states. [2019-11-06 21:26:52,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:52,880 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2019-11-06 21:26:52,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:26:52,881 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2019-11-06 21:26:52,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:52,883 INFO L225 Difference]: With dead ends: 90 [2019-11-06 21:26:52,883 INFO L226 Difference]: Without dead ends: 88 [2019-11-06 21:26:52,884 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=30, Invalid=101, Unknown=1, NotChecked=0, Total=132 [2019-11-06 21:26:52,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-06 21:26:52,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2019-11-06 21:26:52,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-06 21:26:52,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2019-11-06 21:26:52,896 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 26 [2019-11-06 21:26:52,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:52,896 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2019-11-06 21:26:52,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:26:52,897 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2019-11-06 21:26:52,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 21:26:52,898 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:52,898 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:53,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:53,103 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:53,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:53,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1198817260, now seen corresponding path program 1 times [2019-11-06 21:26:53,104 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:53,104 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083272114] [2019-11-06 21:26:53,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:53,113 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:53,114 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570128220] [2019-11-06 21:26:53,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:53,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:53,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-06 21:26:53,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:53,195 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:53,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:26:53,227 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083272114] [2019-11-06 21:26:53,227 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:53,228 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570128220] [2019-11-06 21:26:53,228 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:53,228 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 21:26:53,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127764505] [2019-11-06 21:26:53,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:26:53,229 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:53,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:26:53,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:26:53,229 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand 10 states. [2019-11-06 21:26:55,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:55,458 INFO L93 Difference]: Finished difference Result 102 states and 130 transitions. [2019-11-06 21:26:55,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 21:26:55,458 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2019-11-06 21:26:55,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:55,460 INFO L225 Difference]: With dead ends: 102 [2019-11-06 21:26:55,460 INFO L226 Difference]: Without dead ends: 99 [2019-11-06 21:26:55,460 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-11-06 21:26:55,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-06 21:26:55,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2019-11-06 21:26:55,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-06 21:26:55,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 115 transitions. [2019-11-06 21:26:55,472 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 115 transitions. Word has length 26 [2019-11-06 21:26:55,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:55,473 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 115 transitions. [2019-11-06 21:26:55,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:26:55,473 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 115 transitions. [2019-11-06 21:26:55,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 21:26:55,474 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:55,474 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:55,678 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:55,679 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:55,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:55,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1456982698, now seen corresponding path program 1 times [2019-11-06 21:26:55,680 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:55,680 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970820085] [2019-11-06 21:26:55,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:55,685 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:55,686 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812136946] [2019-11-06 21:26:55,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:55,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 21:26:55,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:55,771 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:55,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:26:55,810 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970820085] [2019-11-06 21:26:55,811 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:55,812 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812136946] [2019-11-06 21:26:55,812 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:55,812 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 21:26:55,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292907038] [2019-11-06 21:26:55,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:26:55,813 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:55,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:26:55,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:26:55,814 INFO L87 Difference]: Start difference. First operand 92 states and 115 transitions. Second operand 10 states. [2019-11-06 21:26:58,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:26:58,242 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2019-11-06 21:26:58,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 21:26:58,242 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2019-11-06 21:26:58,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:26:58,244 INFO L225 Difference]: With dead ends: 106 [2019-11-06 21:26:58,244 INFO L226 Difference]: Without dead ends: 104 [2019-11-06 21:26:58,244 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-11-06 21:26:58,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-06 21:26:58,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 92. [2019-11-06 21:26:58,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-06 21:26:58,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 115 transitions. [2019-11-06 21:26:58,256 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 115 transitions. Word has length 26 [2019-11-06 21:26:58,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:26:58,257 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 115 transitions. [2019-11-06 21:26:58,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:26:58,257 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 115 transitions. [2019-11-06 21:26:58,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 21:26:58,258 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:26:58,258 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:26:58,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:26:58,468 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:26:58,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:26:58,469 INFO L82 PathProgramCache]: Analyzing trace with hash 394786203, now seen corresponding path program 1 times [2019-11-06 21:26:58,469 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:26:58,469 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305671435] [2019-11-06 21:26:58,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:26:58,475 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:26:58,475 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953198364] [2019-11-06 21:26:58,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 21:26:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:26:58,518 WARN L254 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-06 21:26:58,520 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:26:59,415 WARN L191 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2019-11-06 21:26:59,418 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:26:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:26:59,523 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305671435] [2019-11-06 21:26:59,523 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:26:59,523 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953198364] [2019-11-06 21:26:59,523 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:26:59,524 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 21:26:59,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409490264] [2019-11-06 21:26:59,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:26:59,524 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:26:59,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:26:59,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:26:59,525 INFO L87 Difference]: Start difference. First operand 92 states and 115 transitions. Second operand 10 states. [2019-11-06 21:27:00,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:00,219 INFO L93 Difference]: Finished difference Result 138 states and 180 transitions. [2019-11-06 21:27:00,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:27:00,220 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2019-11-06 21:27:00,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:00,222 INFO L225 Difference]: With dead ends: 138 [2019-11-06 21:27:00,222 INFO L226 Difference]: Without dead ends: 102 [2019-11-06 21:27:00,223 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:27:00,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-06 21:27:00,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2019-11-06 21:27:00,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-06 21:27:00,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 125 transitions. [2019-11-06 21:27:00,234 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 125 transitions. Word has length 27 [2019-11-06 21:27:00,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:00,234 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 125 transitions. [2019-11-06 21:27:00,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:27:00,234 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 125 transitions. [2019-11-06 21:27:00,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 21:27:00,235 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:00,236 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:00,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:00,439 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:00,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:00,440 INFO L82 PathProgramCache]: Analyzing trace with hash -862656033, now seen corresponding path program 2 times [2019-11-06 21:27:00,440 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:00,440 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543202997] [2019-11-06 21:27:00,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:00,445 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:27:00,446 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831192928] [2019-11-06 21:27:00,446 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 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 [2019-11-06 21:27:00,481 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:27:00,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:27:00,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-06 21:27:00,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:27:00,508 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:00,509 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:00,647 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:00,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:00,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:00,650 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:00,651 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:00,762 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:27:00,786 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543202997] [2019-11-06 21:27:00,786 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:27:00,786 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831192928] [2019-11-06 21:27:00,787 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:27:00,787 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-06 21:27:00,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242983082] [2019-11-06 21:27:00,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 21:27:00,788 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:00,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 21:27:00,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=85, Unknown=1, NotChecked=0, Total=110 [2019-11-06 21:27:00,788 INFO L87 Difference]: Start difference. First operand 101 states and 125 transitions. Second operand 11 states. [2019-11-06 21:27:01,011 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod c_main_~b~0 2) 0) (= c_main_~p~0 1) (= (+ c_main_~q~0 (* (* c_main_~a~0 c_main_~b~0) c_main_~p~0)) (* c_main_~x~0 c_main_~y~0)) (= c_main_~b~0 c_main_~y~0) (<= 1 c_main_~y~0) (exists ((v_main_~a~0_26 Int)) (and (<= 0 v_main_~a~0_26) (<= v_main_~a~0_26 (+ c_main_~a~0 1)) (= (mod v_main_~a~0_26 2) 1) (not (= 0 v_main_~a~0_26)))) (not (= c_main_~a~0 0))) is different from false [2019-11-06 21:27:02,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:02,260 INFO L93 Difference]: Finished difference Result 113 states and 140 transitions. [2019-11-06 21:27:02,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 21:27:02,261 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2019-11-06 21:27:02,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:02,262 INFO L225 Difference]: With dead ends: 113 [2019-11-06 21:27:02,262 INFO L226 Difference]: Without dead ends: 111 [2019-11-06 21:27:02,263 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=121, Unknown=2, NotChecked=22, Total=182 [2019-11-06 21:27:02,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-11-06 21:27:02,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2019-11-06 21:27:02,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-06 21:27:02,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 131 transitions. [2019-11-06 21:27:02,273 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 131 transitions. Word has length 27 [2019-11-06 21:27:02,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:02,274 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 131 transitions. [2019-11-06 21:27:02,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 21:27:02,274 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 131 transitions. [2019-11-06 21:27:02,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 21:27:02,275 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:02,275 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:02,479 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:02,479 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:02,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:02,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1631317159, now seen corresponding path program 1 times [2019-11-06 21:27:02,480 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:02,480 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143200098] [2019-11-06 21:27:02,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:02,485 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:27:02,486 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780947873] [2019-11-06 21:27:02,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 21:27:02,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:02,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-06 21:27:02,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:27:02,724 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:27:02,745 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143200098] [2019-11-06 21:27:02,745 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:27:02,745 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780947873] [2019-11-06 21:27:02,745 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:27:02,745 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 21:27:02,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095708122] [2019-11-06 21:27:02,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:27:02,746 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:02,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:27:02,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:27:02,747 INFO L87 Difference]: Start difference. First operand 107 states and 131 transitions. Second operand 10 states. [2019-11-06 21:27:03,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:03,526 INFO L93 Difference]: Finished difference Result 142 states and 180 transitions. [2019-11-06 21:27:03,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:27:03,526 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-11-06 21:27:03,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:03,528 INFO L225 Difference]: With dead ends: 142 [2019-11-06 21:27:03,528 INFO L226 Difference]: Without dead ends: 120 [2019-11-06 21:27:03,529 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:27:03,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-11-06 21:27:03,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2019-11-06 21:27:03,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-11-06 21:27:03,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 145 transitions. [2019-11-06 21:27:03,540 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 145 transitions. Word has length 28 [2019-11-06 21:27:03,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:03,540 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 145 transitions. [2019-11-06 21:27:03,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:27:03,540 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 145 transitions. [2019-11-06 21:27:03,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 21:27:03,541 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:03,542 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:03,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:03,745 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:03,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:03,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1688575461, now seen corresponding path program 1 times [2019-11-06 21:27:03,745 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:03,746 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897722309] [2019-11-06 21:27:03,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:03,750 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:27:03,750 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624785740] [2019-11-06 21:27:03,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 21:27:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:03,787 WARN L254 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-06 21:27:03,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:27:04,138 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2019-11-06 21:27:04,291 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:04,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:27:04,334 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897722309] [2019-11-06 21:27:04,334 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:27:04,334 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624785740] [2019-11-06 21:27:04,334 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:27:04,334 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-06 21:27:04,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724134288] [2019-11-06 21:27:04,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 21:27:04,335 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:04,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 21:27:04,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:27:04,335 INFO L87 Difference]: Start difference. First operand 117 states and 145 transitions. Second operand 11 states. [2019-11-06 21:27:04,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:04,823 INFO L93 Difference]: Finished difference Result 151 states and 192 transitions. [2019-11-06 21:27:04,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 21:27:04,824 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-11-06 21:27:04,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:04,826 INFO L225 Difference]: With dead ends: 151 [2019-11-06 21:27:04,830 INFO L226 Difference]: Without dead ends: 129 [2019-11-06 21:27:04,831 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-11-06 21:27:04,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-06 21:27:04,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2019-11-06 21:27:04,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-06 21:27:04,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 153 transitions. [2019-11-06 21:27:04,857 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 153 transitions. Word has length 28 [2019-11-06 21:27:04,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:04,857 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 153 transitions. [2019-11-06 21:27:04,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 21:27:04,858 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 153 transitions. [2019-11-06 21:27:04,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 21:27:04,865 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:04,866 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:05,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:05,071 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:05,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:05,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1671899687, now seen corresponding path program 2 times [2019-11-06 21:27:05,071 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:05,071 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464978117] [2019-11-06 21:27:05,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:05,078 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:27:05,078 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974061876] [2019-11-06 21:27:05,079 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 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 [2019-11-06 21:27:05,123 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:27:05,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:27:05,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-06 21:27:05,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:27:05,223 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:05,224 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:05,224 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:05,224 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:05,225 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:05,225 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:05,226 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:05,226 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:07,374 WARN L191 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2019-11-06 21:27:07,378 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:27:07,406 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464978117] [2019-11-06 21:27:07,406 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:27:07,406 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974061876] [2019-11-06 21:27:07,407 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:27:07,407 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 21:27:07,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933342560] [2019-11-06 21:27:07,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:27:07,408 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:07,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:27:07,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:27:07,408 INFO L87 Difference]: Start difference. First operand 124 states and 153 transitions. Second operand 10 states. [2019-11-06 21:27:10,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:10,270 INFO L93 Difference]: Finished difference Result 141 states and 176 transitions. [2019-11-06 21:27:10,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:27:10,271 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-11-06 21:27:10,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:10,273 INFO L225 Difference]: With dead ends: 141 [2019-11-06 21:27:10,273 INFO L226 Difference]: Without dead ends: 139 [2019-11-06 21:27:10,274 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:27:10,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-06 21:27:10,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 130. [2019-11-06 21:27:10,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-11-06 21:27:10,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 159 transitions. [2019-11-06 21:27:10,285 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 159 transitions. Word has length 28 [2019-11-06 21:27:10,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:10,285 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 159 transitions. [2019-11-06 21:27:10,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:27:10,285 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 159 transitions. [2019-11-06 21:27:10,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 21:27:10,286 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:10,286 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:10,490 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:10,490 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:10,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:10,491 INFO L82 PathProgramCache]: Analyzing trace with hash 660782437, now seen corresponding path program 2 times [2019-11-06 21:27:10,491 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:10,492 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889476749] [2019-11-06 21:27:10,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:10,496 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:27:10,496 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583313740] [2019-11-06 21:27:10,496 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 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 [2019-11-06 21:27:10,542 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:27:10,543 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:27:10,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-06 21:27:10,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:27:10,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:10,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:10,596 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:10,596 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:10,596 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:10,981 WARN L191 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2019-11-06 21:27:10,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:27:11,011 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889476749] [2019-11-06 21:27:11,011 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:27:11,011 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583313740] [2019-11-06 21:27:11,011 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:27:11,012 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 21:27:11,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028365897] [2019-11-06 21:27:11,012 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:27:11,012 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:11,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:27:11,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:27:11,013 INFO L87 Difference]: Start difference. First operand 130 states and 159 transitions. Second operand 10 states. [2019-11-06 21:27:15,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:15,383 INFO L93 Difference]: Finished difference Result 152 states and 191 transitions. [2019-11-06 21:27:15,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:27:15,385 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-11-06 21:27:15,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:15,387 INFO L225 Difference]: With dead ends: 152 [2019-11-06 21:27:15,387 INFO L226 Difference]: Without dead ends: 150 [2019-11-06 21:27:15,387 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:27:15,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-11-06 21:27:15,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 131. [2019-11-06 21:27:15,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-11-06 21:27:15,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 161 transitions. [2019-11-06 21:27:15,398 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 161 transitions. Word has length 28 [2019-11-06 21:27:15,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:15,398 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 161 transitions. [2019-11-06 21:27:15,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:27:15,398 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 161 transitions. [2019-11-06 21:27:15,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 21:27:15,399 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:15,399 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:15,601 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:15,601 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:15,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:15,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1615173920, now seen corresponding path program 1 times [2019-11-06 21:27:15,602 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:15,602 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780704605] [2019-11-06 21:27:15,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:15,608 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:27:15,608 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729652909] [2019-11-06 21:27:15,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:15,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 21:27:15,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:27:15,693 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 21:27:15,694 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780704605] [2019-11-06 21:27:15,694 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:27:15,694 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729652909] [2019-11-06 21:27:15,694 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:27:15,694 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 21:27:15,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837539646] [2019-11-06 21:27:15,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 21:27:15,695 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:15,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 21:27:15,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:27:15,696 INFO L87 Difference]: Start difference. First operand 131 states and 161 transitions. Second operand 6 states. [2019-11-06 21:27:15,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:15,760 INFO L93 Difference]: Finished difference Result 140 states and 170 transitions. [2019-11-06 21:27:15,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 21:27:15,766 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2019-11-06 21:27:15,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:15,767 INFO L225 Difference]: With dead ends: 140 [2019-11-06 21:27:15,767 INFO L226 Difference]: Without dead ends: 132 [2019-11-06 21:27:15,768 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:27:15,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-11-06 21:27:15,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2019-11-06 21:27:15,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-11-06 21:27:15,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 158 transitions. [2019-11-06 21:27:15,778 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 158 transitions. Word has length 31 [2019-11-06 21:27:15,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:15,778 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 158 transitions. [2019-11-06 21:27:15,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 21:27:15,778 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 158 transitions. [2019-11-06 21:27:15,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 21:27:15,779 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:15,779 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:15,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:15,983 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:15,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:15,983 INFO L82 PathProgramCache]: Analyzing trace with hash 169189792, now seen corresponding path program 1 times [2019-11-06 21:27:15,983 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:15,984 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743223933] [2019-11-06 21:27:15,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:16,000 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:27:16,000 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574214969] [2019-11-06 21:27:16,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:16,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 21:27:16,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:27:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 21:27:16,107 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743223933] [2019-11-06 21:27:16,107 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:27:16,107 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574214969] [2019-11-06 21:27:16,108 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:27:16,108 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-06 21:27:16,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965122633] [2019-11-06 21:27:16,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 21:27:16,108 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:16,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 21:27:16,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 21:27:16,109 INFO L87 Difference]: Start difference. First operand 131 states and 158 transitions. Second operand 5 states. [2019-11-06 21:27:16,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:16,192 INFO L93 Difference]: Finished difference Result 186 states and 243 transitions. [2019-11-06 21:27:16,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 21:27:16,193 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2019-11-06 21:27:16,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:16,194 INFO L225 Difference]: With dead ends: 186 [2019-11-06 21:27:16,194 INFO L226 Difference]: Without dead ends: 152 [2019-11-06 21:27:16,195 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:27:16,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-11-06 21:27:16,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 146. [2019-11-06 21:27:16,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-11-06 21:27:16,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 179 transitions. [2019-11-06 21:27:16,206 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 179 transitions. Word has length 30 [2019-11-06 21:27:16,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:16,207 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 179 transitions. [2019-11-06 21:27:16,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 21:27:16,207 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 179 transitions. [2019-11-06 21:27:16,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 21:27:16,208 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:16,208 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:16,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:16,419 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:16,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:16,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1091445474, now seen corresponding path program 1 times [2019-11-06 21:27:16,420 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:16,420 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316698752] [2019-11-06 21:27:16,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:16,424 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:27:16,425 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1633452402] [2019-11-06 21:27:16,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:27:16,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 21:27:16,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:27:16,490 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 21:27:16,503 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316698752] [2019-11-06 21:27:16,503 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:27:16,503 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633452402] [2019-11-06 21:27:16,503 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:27:16,504 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 21:27:16,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814526901] [2019-11-06 21:27:16,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:27:16,505 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:16,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:27:16,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:27:16,505 INFO L87 Difference]: Start difference. First operand 146 states and 179 transitions. Second operand 7 states. [2019-11-06 21:27:16,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:16,609 INFO L93 Difference]: Finished difference Result 157 states and 192 transitions. [2019-11-06 21:27:16,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 21:27:16,610 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2019-11-06 21:27:16,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:16,612 INFO L225 Difference]: With dead ends: 157 [2019-11-06 21:27:16,612 INFO L226 Difference]: Without dead ends: 144 [2019-11-06 21:27:16,613 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:27:16,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-11-06 21:27:16,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 119. [2019-11-06 21:27:16,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-11-06 21:27:16,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 143 transitions. [2019-11-06 21:27:16,630 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 143 transitions. Word has length 31 [2019-11-06 21:27:16,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:16,630 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 143 transitions. [2019-11-06 21:27:16,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:27:16,630 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 143 transitions. [2019-11-06 21:27:16,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 21:27:16,631 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:16,632 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:16,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:16,836 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:16,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:16,836 INFO L82 PathProgramCache]: Analyzing trace with hash -909136864, now seen corresponding path program 2 times [2019-11-06 21:27:16,836 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:16,837 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704837123] [2019-11-06 21:27:16,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:16,841 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:27:16,841 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [600931512] [2019-11-06 21:27:16,842 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:16,886 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:27:16,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:27:16,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-06 21:27:16,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:27:17,012 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:27:17,040 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704837123] [2019-11-06 21:27:17,040 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:27:17,040 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600931512] [2019-11-06 21:27:17,041 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:27:17,041 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 21:27:17,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740734701] [2019-11-06 21:27:17,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:27:17,041 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:17,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:27:17,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:27:17,042 INFO L87 Difference]: Start difference. First operand 119 states and 143 transitions. Second operand 10 states. [2019-11-06 21:27:17,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:17,546 INFO L93 Difference]: Finished difference Result 161 states and 200 transitions. [2019-11-06 21:27:17,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:27:17,553 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-11-06 21:27:17,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:17,554 INFO L225 Difference]: With dead ends: 161 [2019-11-06 21:27:17,554 INFO L226 Difference]: Without dead ends: 129 [2019-11-06 21:27:17,554 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:27:17,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-06 21:27:17,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 121. [2019-11-06 21:27:17,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-06 21:27:17,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 146 transitions. [2019-11-06 21:27:17,564 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 146 transitions. Word has length 30 [2019-11-06 21:27:17,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:17,564 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 146 transitions. [2019-11-06 21:27:17,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:27:17,564 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 146 transitions. [2019-11-06 21:27:17,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 21:27:17,565 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:17,565 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:17,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:17,768 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:17,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:17,769 INFO L82 PathProgramCache]: Analyzing trace with hash -851878562, now seen corresponding path program 2 times [2019-11-06 21:27:17,769 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:17,769 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641349364] [2019-11-06 21:27:17,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:17,774 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:27:17,775 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [130002242] [2019-11-06 21:27:17,775 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:17,815 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:27:17,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:27:17,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 21:27:17,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:27:17,853 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:17,853 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:17,854 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 21:27:17,854 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:17,855 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:17,855 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:17,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:17,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:17,857 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:17,858 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,047 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 21:27:18,047 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641349364] [2019-11-06 21:27:18,048 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:27:18,048 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130002242] [2019-11-06 21:27:18,048 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:27:18,048 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-06 21:27:18,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200509513] [2019-11-06 21:27:18,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 21:27:18,049 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:18,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 21:27:18,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:27:18,049 INFO L87 Difference]: Start difference. First operand 121 states and 146 transitions. Second operand 6 states. [2019-11-06 21:27:18,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:27:18,222 INFO L93 Difference]: Finished difference Result 168 states and 213 transitions. [2019-11-06 21:27:18,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:27:18,223 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-11-06 21:27:18,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:27:18,225 INFO L225 Difference]: With dead ends: 168 [2019-11-06 21:27:18,225 INFO L226 Difference]: Without dead ends: 138 [2019-11-06 21:27:18,225 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:27:18,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-06 21:27:18,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 122. [2019-11-06 21:27:18,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-11-06 21:27:18,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 147 transitions. [2019-11-06 21:27:18,239 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 147 transitions. Word has length 30 [2019-11-06 21:27:18,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:27:18,239 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 147 transitions. [2019-11-06 21:27:18,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 21:27:18,239 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 147 transitions. [2019-11-06 21:27:18,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 21:27:18,243 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:27:18,243 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:27:18,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:18,447 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:27:18,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:27:18,448 INFO L82 PathProgramCache]: Analyzing trace with hash 605616494, now seen corresponding path program 3 times [2019-11-06 21:27:18,448 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:27:18,448 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957433087] [2019-11-06 21:27:18,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:27:18,452 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:27:18,452 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556973376] [2019-11-06 21:27:18,452 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:27:18,505 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 21:27:18,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:27:18,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 21:27:18,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:27:18,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,540 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,540 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,546 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,548 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,549 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,550 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,551 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,555 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,556 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,557 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,558 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,559 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,560 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,562 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,563 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,563 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,565 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,566 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,567 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,568 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,569 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,570 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,571 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,573 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,574 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,575 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,579 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,580 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,581 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,582 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,590 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,590 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,591 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,592 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,592 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,593 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,594 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,594 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,596 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,597 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,598 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,599 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,599 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:18,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:21,312 WARN L191 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2019-11-06 21:27:21,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:27:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 21:27:21,350 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957433087] [2019-11-06 21:27:21,350 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:27:21,351 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556973376] [2019-11-06 21:27:21,351 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:27:21,351 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 21:27:21,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011118903] [2019-11-06 21:27:21,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:27:21,351 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:27:21,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:27:21,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=53, Unknown=1, NotChecked=0, Total=72 [2019-11-06 21:27:21,352 INFO L87 Difference]: Start difference. First operand 122 states and 147 transitions. Second operand 9 states.