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 0.1.24-13a467a-m [2019-10-14 23:17:25,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:17:25,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:17:25,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:17:25,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:17:25,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:17:25,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:17:25,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:17:25,786 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:17:25,790 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:17:25,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:17:25,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:17:25,795 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:17:25,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:17:25,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:17:25,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:17:25,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:17:25,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:17:25,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:17:25,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:17:25,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:17:25,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:17:25,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:17:25,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:17:25,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:17:25,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:17:25,827 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:17:25,828 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:17:25,828 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:17:25,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:17:25,829 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:17:25,830 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:17:25,830 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:17:25,830 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:17:25,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:17:25,832 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:17:25,832 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:17:25,847 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:17:25,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:17:25,848 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:17:25,848 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:17:25,849 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:17:25,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:17:25,849 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:17:25,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:17:25,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:17:25,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:17:25,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:17:25,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:17:25,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:17:25,850 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:17:25,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:17:25,851 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:17:25,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:17:25,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:17:25,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:17:25,852 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:17:25,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:17:25,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:17:25,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:17:25,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:17:25,853 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:17:25,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:17:25,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:17:25,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:17:25,853 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:17:26,118 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:17:26,131 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:17:26,135 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:17:26,136 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:17:26,136 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:17:26,137 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/prod4br.c [2019-10-14 23:17:26,197 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc7fbadbc/6179c80c3efc401fb012661b4b0284b0/FLAG5119ed2ba [2019-10-14 23:17:26,630 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:17:26,631 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/prod4br.c [2019-10-14 23:17:26,639 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc7fbadbc/6179c80c3efc401fb012661b4b0284b0/FLAG5119ed2ba [2019-10-14 23:17:27,028 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc7fbadbc/6179c80c3efc401fb012661b4b0284b0 [2019-10-14 23:17:27,038 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:17:27,040 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:17:27,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:27,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:17:27,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:17:27,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:27" (1/1) ... [2019-10-14 23:17:27,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b0f51fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:27, skipping insertion in model container [2019-10-14 23:17:27,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:27" (1/1) ... [2019-10-14 23:17:27,056 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:17:27,075 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:17:27,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:27,261 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:17:27,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:27,292 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:17:27,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:27 WrapperNode [2019-10-14 23:17:27,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:27,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:17:27,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:17:27,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:17:27,381 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:27" (1/1) ... [2019-10-14 23:17:27,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:27" (1/1) ... [2019-10-14 23:17:27,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:27" (1/1) ... [2019-10-14 23:17:27,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:27" (1/1) ... [2019-10-14 23:17:27,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:27" (1/1) ... [2019-10-14 23:17:27,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:27" (1/1) ... [2019-10-14 23:17:27,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:27" (1/1) ... [2019-10-14 23:17:27,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:17:27,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:17:27,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:17:27,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:17:27,415 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:17:27,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:17:27,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:17:27,462 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:17:27,462 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:17:27,462 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:17:27,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:17:27,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:17:27,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:17:27,464 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:17:27,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:17:27,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:17:27,688 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:17:27,688 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:17:27,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:27 BoogieIcfgContainer [2019-10-14 23:17:27,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:17:27,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:17:27,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:17:27,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:17:27,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:17:27" (1/3) ... [2019-10-14 23:17:27,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a2b8926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:27, skipping insertion in model container [2019-10-14 23:17:27,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:27" (2/3) ... [2019-10-14 23:17:27,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a2b8926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:27, skipping insertion in model container [2019-10-14 23:17:27,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:27" (3/3) ... [2019-10-14 23:17:27,718 INFO L109 eAbstractionObserver]: Analyzing ICFG prod4br.c [2019-10-14 23:17:27,738 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:17:27,755 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:17:27,777 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:17:27,803 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:17:27,803 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:17:27,804 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:17:27,804 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:17:27,804 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:17:27,804 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:17:27,804 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:17:27,804 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:17:27,819 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-14 23:17:27,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:17:27,825 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:27,826 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:27,828 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:27,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:27,833 INFO L82 PathProgramCache]: Analyzing trace with hash 152624894, now seen corresponding path program 1 times [2019-10-14 23:17:27,842 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:27,842 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325857039] [2019-10-14 23:17:27,843 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:27,843 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:27,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:27,945 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325857039] [2019-10-14 23:17:27,946 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:27,946 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:17:27,947 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861155027] [2019-10-14 23:17:27,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:17:27,951 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:27,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:17:27,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:17:27,963 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2019-10-14 23:17:27,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:27,986 INFO L93 Difference]: Finished difference Result 43 states and 62 transitions. [2019-10-14 23:17:27,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:17:27,987 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-14 23:17:27,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:27,997 INFO L225 Difference]: With dead ends: 43 [2019-10-14 23:17:27,997 INFO L226 Difference]: Without dead ends: 19 [2019-10-14 23:17:28,001 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:17:28,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-14 23:17:28,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-14 23:17:28,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-14 23:17:28,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2019-10-14 23:17:28,042 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2019-10-14 23:17:28,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:28,043 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-10-14 23:17:28,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:17:28,043 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2019-10-14 23:17:28,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:17:28,044 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:28,045 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:28,045 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:28,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:28,046 INFO L82 PathProgramCache]: Analyzing trace with hash 130400808, now seen corresponding path program 1 times [2019-10-14 23:17:28,046 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:28,046 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004414880] [2019-10-14 23:17:28,046 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:28,047 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:28,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:28,055 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:28,056 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641537181] [2019-10-14 23:17:28,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:28,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 23:17:28,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:28,182 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004414880] [2019-10-14 23:17:28,182 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:28,182 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641537181] [2019-10-14 23:17:28,183 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:28,183 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:17:28,183 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725982504] [2019-10-14 23:17:28,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:17:28,185 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:28,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:17:28,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:17:28,186 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 5 states. [2019-10-14 23:17:28,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:28,297 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-10-14 23:17:28,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:17:28,298 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-14 23:17:28,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:28,300 INFO L225 Difference]: With dead ends: 33 [2019-10-14 23:17:28,301 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 23:17:28,302 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:17:28,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 23:17:28,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2019-10-14 23:17:28,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-14 23:17:28,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2019-10-14 23:17:28,321 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 10 [2019-10-14 23:17:28,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:28,321 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2019-10-14 23:17:28,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:17:28,322 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2019-10-14 23:17:28,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 23:17:28,323 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:28,323 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:28,527 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:28,528 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:28,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:28,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1836845457, now seen corresponding path program 1 times [2019-10-14 23:17:28,529 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:28,530 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311437716] [2019-10-14 23:17:28,530 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:28,531 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:28,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:28,540 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:28,540 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349269856] [2019-10-14 23:17:28,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:28,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 23:17:28,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:28,649 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:28,718 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311437716] [2019-10-14 23:17:28,719 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:28,719 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349269856] [2019-10-14 23:17:28,719 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:28,719 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:17:28,719 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044984200] [2019-10-14 23:17:28,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:17:28,720 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:28,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:17:28,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:28,721 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 9 states. [2019-10-14 23:17:29,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:29,149 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2019-10-14 23:17:29,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:17:29,149 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-10-14 23:17:29,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:29,152 INFO L225 Difference]: With dead ends: 39 [2019-10-14 23:17:29,152 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 23:17:29,153 INFO L600 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 [2019-10-14 23:17:29,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 23:17:29,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2019-10-14 23:17:29,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 23:17:29,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2019-10-14 23:17:29,162 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 16 [2019-10-14 23:17:29,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:29,162 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2019-10-14 23:17:29,162 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:17:29,163 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2019-10-14 23:17:29,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:17:29,163 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:29,164 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:29,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:29,373 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:29,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:29,373 INFO L82 PathProgramCache]: Analyzing trace with hash 682822634, now seen corresponding path program 1 times [2019-10-14 23:17:29,373 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:29,374 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688837038] [2019-10-14 23:17:29,374 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:29,374 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:29,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:29,385 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:29,385 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443483825] [2019-10-14 23:17:29,386 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 [2019-10-14 23:17:29,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:29,418 WARN L254 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 23:17:29,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:29,551 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:29,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688837038] [2019-10-14 23:17:29,579 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:29,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443483825] [2019-10-14 23:17:29,579 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:29,579 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:17:29,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929119214] [2019-10-14 23:17:29,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:17:29,581 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:29,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:17:29,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:29,582 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 9 states. [2019-10-14 23:17:29,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:29,880 INFO L93 Difference]: Finished difference Result 55 states and 74 transitions. [2019-10-14 23:17:29,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:17:29,881 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2019-10-14 23:17:29,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:29,882 INFO L225 Difference]: With dead ends: 55 [2019-10-14 23:17:29,882 INFO L226 Difference]: Without dead ends: 53 [2019-10-14 23:17:29,883 INFO L600 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 [2019-10-14 23:17:29,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-14 23:17:29,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2019-10-14 23:17:29,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 23:17:29,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2019-10-14 23:17:29,895 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 18 [2019-10-14 23:17:29,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:29,897 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2019-10-14 23:17:29,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:17:29,897 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2019-10-14 23:17:29,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 23:17:29,898 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:29,898 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:30,099 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:30,099 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:30,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:30,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1827366173, now seen corresponding path program 1 times [2019-10-14 23:17:30,100 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:30,100 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518448192] [2019-10-14 23:17:30,101 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:30,101 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:30,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:30,106 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:30,107 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1985610869] [2019-10-14 23:17:30,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:30,162 WARN L254 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 23:17:30,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:30,529 WARN L191 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2019-10-14 23:17:30,534 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:30,583 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518448192] [2019-10-14 23:17:30,583 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:30,584 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985610869] [2019-10-14 23:17:30,584 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:30,584 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:17:30,584 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46476775] [2019-10-14 23:17:30,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:17:30,585 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:30,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:17:30,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:30,586 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 9 states. [2019-10-14 23:17:30,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:30,945 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2019-10-14 23:17:30,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:17:30,946 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2019-10-14 23:17:30,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:30,947 INFO L225 Difference]: With dead ends: 75 [2019-10-14 23:17:30,947 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 23:17:30,948 INFO L600 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 [2019-10-14 23:17:30,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 23:17:30,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2019-10-14 23:17:30,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 23:17:30,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2019-10-14 23:17:30,958 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 19 [2019-10-14 23:17:30,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:30,959 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2019-10-14 23:17:30,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:17:30,959 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2019-10-14 23:17:30,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 23:17:30,960 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:30,960 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:31,163 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:31,164 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:31,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:31,165 INFO L82 PathProgramCache]: Analyzing trace with hash 560958013, now seen corresponding path program 1 times [2019-10-14 23:17:31,165 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:31,166 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748939171] [2019-10-14 23:17:31,166 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:31,167 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:31,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:31,173 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:31,173 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598163461] [2019-10-14 23:17:31,173 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 [2019-10-14 23:17:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:31,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:17:31,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:31,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:17:31,232 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748939171] [2019-10-14 23:17:31,232 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:31,232 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598163461] [2019-10-14 23:17:31,232 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:31,233 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:17:31,233 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291354189] [2019-10-14 23:17:31,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:17:31,234 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:31,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:17:31,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:17:31,234 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 6 states. [2019-10-14 23:17:31,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:31,326 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2019-10-14 23:17:31,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:17:31,326 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-10-14 23:17:31,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:31,327 INFO L225 Difference]: With dead ends: 61 [2019-10-14 23:17:31,327 INFO L226 Difference]: Without dead ends: 49 [2019-10-14 23:17:31,328 INFO L600 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 [2019-10-14 23:17:31,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-14 23:17:31,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-10-14 23:17:31,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-14 23:17:31,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2019-10-14 23:17:31,336 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 21 [2019-10-14 23:17:31,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:31,337 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2019-10-14 23:17:31,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:17:31,337 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2019-10-14 23:17:31,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 23:17:31,337 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:31,337 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:31,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:31,539 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:31,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:31,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1203344027, now seen corresponding path program 1 times [2019-10-14 23:17:31,540 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:31,540 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020979619] [2019-10-14 23:17:31,540 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:31,540 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:31,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:31,546 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:31,546 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345660892] [2019-10-14 23:17:31,546 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 [2019-10-14 23:17:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:31,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 23:17:31,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:31,689 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:31,711 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020979619] [2019-10-14 23:17:31,711 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:31,711 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345660892] [2019-10-14 23:17:31,711 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:31,712 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:17:31,712 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157834928] [2019-10-14 23:17:31,712 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:17:31,712 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:31,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:17:31,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:31,713 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 9 states. [2019-10-14 23:17:32,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:32,163 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2019-10-14 23:17:32,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:17:32,164 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2019-10-14 23:17:32,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:32,165 INFO L225 Difference]: With dead ends: 75 [2019-10-14 23:17:32,165 INFO L226 Difference]: Without dead ends: 61 [2019-10-14 23:17:32,166 INFO L600 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 [2019-10-14 23:17:32,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-14 23:17:32,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2019-10-14 23:17:32,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-14 23:17:32,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2019-10-14 23:17:32,175 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 20 [2019-10-14 23:17:32,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:32,175 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2019-10-14 23:17:32,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:17:32,176 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2019-10-14 23:17:32,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 23:17:32,177 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:32,177 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:32,379 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:32,380 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:32,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:32,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1146085725, now seen corresponding path program 1 times [2019-10-14 23:17:32,381 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:32,381 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722780081] [2019-10-14 23:17:32,381 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:32,382 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:32,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:32,387 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:32,387 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756123220] [2019-10-14 23:17:32,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:32,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 23:17:32,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:32,676 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2019-10-14 23:17:32,805 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:32,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:32,830 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722780081] [2019-10-14 23:17:32,830 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:32,830 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756123220] [2019-10-14 23:17:32,831 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:32,831 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:17:32,831 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332534701] [2019-10-14 23:17:32,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:17:32,832 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:32,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:17:32,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:32,832 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand 10 states. [2019-10-14 23:17:33,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:33,607 INFO L93 Difference]: Finished difference Result 85 states and 111 transitions. [2019-10-14 23:17:33,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:17:33,611 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2019-10-14 23:17:33,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:33,612 INFO L225 Difference]: With dead ends: 85 [2019-10-14 23:17:33,613 INFO L226 Difference]: Without dead ends: 71 [2019-10-14 23:17:33,614 INFO L600 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 [2019-10-14 23:17:33,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-14 23:17:33,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2019-10-14 23:17:33,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-14 23:17:33,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2019-10-14 23:17:33,624 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 20 [2019-10-14 23:17:33,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:33,624 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2019-10-14 23:17:33,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:17:33,634 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2019-10-14 23:17:33,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 23:17:33,636 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:33,636 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:33,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:33,840 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:33,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:33,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1259300529, now seen corresponding path program 1 times [2019-10-14 23:17:33,841 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:33,841 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718867867] [2019-10-14 23:17:33,842 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:33,842 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:33,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:33,847 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:33,847 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198476987] [2019-10-14 23:17:33,848 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 [2019-10-14 23:17:33,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:33,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 23:17:33,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:33,882 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:33,883 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:33,883 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:33,884 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:33,885 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:34,611 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:35,113 WARN L191 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 16 [2019-10-14 23:17:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:17:35,135 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718867867] [2019-10-14 23:17:35,136 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:35,136 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198476987] [2019-10-14 23:17:35,136 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:35,136 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:17:35,136 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102383209] [2019-10-14 23:17:35,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:17:35,137 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:35,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:17:35,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=70, Unknown=1, NotChecked=0, Total=90 [2019-10-14 23:17:35,137 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand 10 states. [2019-10-14 23:17:41,387 WARN L191 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2019-10-14 23:17:43,872 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 26 [2019-10-14 23:17:48,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:48,569 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2019-10-14 23:17:48,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:17:48,569 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2019-10-14 23:17:48,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:48,571 INFO L225 Difference]: With dead ends: 81 [2019-10-14 23:17:48,571 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 23:17:48,572 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=45, Invalid=161, Unknown=4, NotChecked=0, Total=210 [2019-10-14 23:17:48,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 23:17:48,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-10-14 23:17:48,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-14 23:17:48,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2019-10-14 23:17:48,581 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 24 [2019-10-14 23:17:48,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:48,582 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2019-10-14 23:17:48,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:17:48,582 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2019-10-14 23:17:48,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 23:17:48,583 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:48,583 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:48,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:48,784 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:48,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:48,785 INFO L82 PathProgramCache]: Analyzing trace with hash -333220948, now seen corresponding path program 2 times [2019-10-14 23:17:48,785 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:48,786 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580771310] [2019-10-14 23:17:48,786 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:48,786 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:48,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:48,791 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:48,791 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [693042019] [2019-10-14 23:17:48,791 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:48,827 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:48,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:48,828 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-14 23:17:48,829 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:48,842 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:48,842 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:48,997 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:48,998 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:48,999 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:49,000 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:49,001 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:49,208 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2019-10-14 23:17:49,213 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 7 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:17:49,248 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580771310] [2019-10-14 23:17:49,248 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:49,248 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693042019] [2019-10-14 23:17:49,248 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:49,248 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:17:49,249 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192670675] [2019-10-14 23:17:49,249 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:17:49,249 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:49,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:17:49,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=70, Unknown=1, NotChecked=0, Total=90 [2019-10-14 23:17:49,250 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand 10 states. [2019-10-14 23:17:49,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:49,933 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2019-10-14 23:17:49,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:17:49,933 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2019-10-14 23:17:49,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:49,935 INFO L225 Difference]: With dead ends: 90 [2019-10-14 23:17:49,935 INFO L226 Difference]: Without dead ends: 88 [2019-10-14 23:17:49,936 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=101, Unknown=1, NotChecked=0, Total=132 [2019-10-14 23:17:49,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-14 23:17:49,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2019-10-14 23:17:49,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-14 23:17:49,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2019-10-14 23:17:49,947 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 26 [2019-10-14 23:17:49,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:49,947 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2019-10-14 23:17:49,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:17:49,948 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2019-10-14 23:17:49,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 23:17:49,949 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:49,949 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:50,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:50,154 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:50,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:50,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1198817260, now seen corresponding path program 1 times [2019-10-14 23:17:50,155 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:50,156 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705930605] [2019-10-14 23:17:50,156 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:50,156 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:50,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:50,162 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:50,162 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904846136] [2019-10-14 23:17:50,162 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 [2019-10-14 23:17:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:50,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 23:17:50,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:50,224 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:17:50,258 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705930605] [2019-10-14 23:17:50,258 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:50,258 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904846136] [2019-10-14 23:17:50,258 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:50,258 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:17:50,258 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775569136] [2019-10-14 23:17:50,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:17:50,259 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:50,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:17:50,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:50,259 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand 10 states. [2019-10-14 23:17:52,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:52,527 INFO L93 Difference]: Finished difference Result 106 states and 138 transitions. [2019-10-14 23:17:52,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:17:52,528 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2019-10-14 23:17:52,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:52,529 INFO L225 Difference]: With dead ends: 106 [2019-10-14 23:17:52,529 INFO L226 Difference]: Without dead ends: 103 [2019-10-14 23:17:52,530 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:17:52,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-14 23:17:52,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2019-10-14 23:17:52,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-10-14 23:17:52,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 115 transitions. [2019-10-14 23:17:52,541 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 115 transitions. Word has length 26 [2019-10-14 23:17:52,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:52,541 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 115 transitions. [2019-10-14 23:17:52,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:17:52,541 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 115 transitions. [2019-10-14 23:17:52,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 23:17:52,542 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:52,543 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:52,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:52,746 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:52,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:52,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1456982698, now seen corresponding path program 1 times [2019-10-14 23:17:52,747 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:52,748 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670621464] [2019-10-14 23:17:52,748 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:52,748 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:52,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:52,754 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:52,754 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658695255] [2019-10-14 23:17:52,754 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 [2019-10-14 23:17:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:52,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:17:52,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:52,840 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:17:52,880 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670621464] [2019-10-14 23:17:52,880 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:52,881 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658695255] [2019-10-14 23:17:52,881 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:52,881 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:17:52,881 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447309362] [2019-10-14 23:17:52,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:17:52,882 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:52,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:17:52,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:52,882 INFO L87 Difference]: Start difference. First operand 92 states and 115 transitions. Second operand 10 states. [2019-10-14 23:17:53,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:53,337 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2019-10-14 23:17:53,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:17:53,338 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2019-10-14 23:17:53,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:53,340 INFO L225 Difference]: With dead ends: 106 [2019-10-14 23:17:53,340 INFO L226 Difference]: Without dead ends: 104 [2019-10-14 23:17:53,341 INFO L600 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 [2019-10-14 23:17:53,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-10-14 23:17:53,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 92. [2019-10-14 23:17:53,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-10-14 23:17:53,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 115 transitions. [2019-10-14 23:17:53,351 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 115 transitions. Word has length 26 [2019-10-14 23:17:53,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:53,351 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 115 transitions. [2019-10-14 23:17:53,351 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:17:53,351 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 115 transitions. [2019-10-14 23:17:53,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 23:17:53,352 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:53,353 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:53,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:53,556 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:53,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:53,557 INFO L82 PathProgramCache]: Analyzing trace with hash 394786203, now seen corresponding path program 1 times [2019-10-14 23:17:53,557 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:53,558 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880003013] [2019-10-14 23:17:53,558 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:53,558 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:53,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:53,567 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:53,567 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872253433] [2019-10-14 23:17:53,567 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 [2019-10-14 23:17:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:53,600 WARN L254 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 40 conjunts are in the unsatisfiable core [2019-10-14 23:17:53,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:54,477 WARN L191 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2019-10-14 23:17:54,482 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:54,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:17:54,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880003013] [2019-10-14 23:17:54,542 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:54,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872253433] [2019-10-14 23:17:54,542 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:54,542 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:17:54,543 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349715300] [2019-10-14 23:17:54,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:17:54,543 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:54,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:17:54,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:54,544 INFO L87 Difference]: Start difference. First operand 92 states and 115 transitions. Second operand 10 states. [2019-10-14 23:17:55,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:55,247 INFO L93 Difference]: Finished difference Result 138 states and 180 transitions. [2019-10-14 23:17:55,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:17:55,248 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2019-10-14 23:17:55,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:55,249 INFO L225 Difference]: With dead ends: 138 [2019-10-14 23:17:55,249 INFO L226 Difference]: Without dead ends: 102 [2019-10-14 23:17:55,250 INFO L600 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 [2019-10-14 23:17:55,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-10-14 23:17:55,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2019-10-14 23:17:55,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-10-14 23:17:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 125 transitions. [2019-10-14 23:17:55,261 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 125 transitions. Word has length 27 [2019-10-14 23:17:55,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:55,262 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 125 transitions. [2019-10-14 23:17:55,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:17:55,262 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 125 transitions. [2019-10-14 23:17:55,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 23:17:55,263 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:55,263 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:55,466 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:55,467 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:55,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:55,467 INFO L82 PathProgramCache]: Analyzing trace with hash -862656033, now seen corresponding path program 2 times [2019-10-14 23:17:55,468 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:55,468 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462529802] [2019-10-14 23:17:55,468 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:55,469 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:55,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:55,473 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:55,473 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712651530] [2019-10-14 23:17:55,474 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 [2019-10-14 23:17:55,511 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:55,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:55,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 23:17:55,514 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:55,575 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:55,575 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:55,766 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:55,766 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:55,767 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:55,769 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:55,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:55,901 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:17:55,944 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462529802] [2019-10-14 23:17:55,944 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:55,945 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712651530] [2019-10-14 23:17:55,945 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:55,945 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-14 23:17:55,946 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182125843] [2019-10-14 23:17:55,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:17:55,951 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:55,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:17:55,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:17:55,954 INFO L87 Difference]: Start difference. First operand 101 states and 125 transitions. Second operand 11 states. [2019-10-14 23:17:56,152 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 [2019-10-14 23:17:58,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:58,653 INFO L93 Difference]: Finished difference Result 113 states and 140 transitions. [2019-10-14 23:17:58,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:17:58,653 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2019-10-14 23:17:58,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:58,654 INFO L225 Difference]: With dead ends: 113 [2019-10-14 23:17:58,655 INFO L226 Difference]: Without dead ends: 111 [2019-10-14 23:17:58,655 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=122, Unknown=1, NotChecked=22, Total=182 [2019-10-14 23:17:58,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-10-14 23:17:58,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2019-10-14 23:17:58,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-14 23:17:58,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 131 transitions. [2019-10-14 23:17:58,668 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 131 transitions. Word has length 27 [2019-10-14 23:17:58,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:58,669 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 131 transitions. [2019-10-14 23:17:58,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:17:58,669 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 131 transitions. [2019-10-14 23:17:58,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:17:58,670 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:58,670 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:58,873 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:58,873 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:58,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:58,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1631317159, now seen corresponding path program 1 times [2019-10-14 23:17:58,874 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:58,874 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602145643] [2019-10-14 23:17:58,874 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:58,874 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:58,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:58,878 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:58,878 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311106358] [2019-10-14 23:17:58,879 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 [2019-10-14 23:17:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:58,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 38 conjunts are in the unsatisfiable core [2019-10-14 23:17:58,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:59,112 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:17:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:17:59,132 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602145643] [2019-10-14 23:17:59,132 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:59,132 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311106358] [2019-10-14 23:17:59,133 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:59,133 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:17:59,133 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441477681] [2019-10-14 23:17:59,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:17:59,134 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:59,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:17:59,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:59,134 INFO L87 Difference]: Start difference. First operand 107 states and 131 transitions. Second operand 10 states. [2019-10-14 23:17:59,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:59,693 INFO L93 Difference]: Finished difference Result 142 states and 180 transitions. [2019-10-14 23:17:59,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:17:59,693 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-10-14 23:17:59,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:59,694 INFO L225 Difference]: With dead ends: 142 [2019-10-14 23:17:59,694 INFO L226 Difference]: Without dead ends: 120 [2019-10-14 23:17:59,695 INFO L600 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 [2019-10-14 23:17:59,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-10-14 23:17:59,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2019-10-14 23:17:59,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-14 23:17:59,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 145 transitions. [2019-10-14 23:17:59,707 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 145 transitions. Word has length 28 [2019-10-14 23:17:59,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:59,707 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 145 transitions. [2019-10-14 23:17:59,707 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:17:59,707 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 145 transitions. [2019-10-14 23:17:59,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:17:59,708 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:59,708 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:59,910 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:59,911 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:59,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:59,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1688575461, now seen corresponding path program 1 times [2019-10-14 23:17:59,912 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:59,912 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580353085] [2019-10-14 23:17:59,912 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:59,913 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:59,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:59,917 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:59,917 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772494674] [2019-10-14 23:17:59,917 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 [2019-10-14 23:17:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:59,951 WARN L254 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 40 conjunts are in the unsatisfiable core [2019-10-14 23:17:59,952 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:00,211 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2019-10-14 23:18:00,308 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:00,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:18:00,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580353085] [2019-10-14 23:18:00,333 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:00,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772494674] [2019-10-14 23:18:00,333 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:00,333 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-14 23:18:00,334 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891600630] [2019-10-14 23:18:00,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:18:00,334 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:00,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:18:00,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:18:00,335 INFO L87 Difference]: Start difference. First operand 117 states and 145 transitions. Second operand 11 states. [2019-10-14 23:18:01,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:01,385 INFO L93 Difference]: Finished difference Result 151 states and 192 transitions. [2019-10-14 23:18:01,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:18:01,386 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-10-14 23:18:01,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:01,387 INFO L225 Difference]: With dead ends: 151 [2019-10-14 23:18:01,387 INFO L226 Difference]: Without dead ends: 129 [2019-10-14 23:18:01,388 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:18:01,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-10-14 23:18:01,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2019-10-14 23:18:01,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-10-14 23:18:01,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 153 transitions. [2019-10-14 23:18:01,397 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 153 transitions. Word has length 28 [2019-10-14 23:18:01,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:01,397 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 153 transitions. [2019-10-14 23:18:01,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:18:01,398 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 153 transitions. [2019-10-14 23:18:01,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:18:01,398 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:01,399 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:01,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:01,604 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:01,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:01,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1671899687, now seen corresponding path program 2 times [2019-10-14 23:18:01,605 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:01,605 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698730520] [2019-10-14 23:18:01,605 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:01,605 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:01,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:01,610 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:01,610 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027109924] [2019-10-14 23:18:01,611 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 [2019-10-14 23:18:01,645 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:18:01,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:18:01,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 23:18:01,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:01,717 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:01,717 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:01,718 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:01,718 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:01,719 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:01,719 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:01,720 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:01,720 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:01,821 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:18:01,849 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698730520] [2019-10-14 23:18:01,849 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:01,849 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027109924] [2019-10-14 23:18:01,849 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:01,850 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:18:01,850 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722643696] [2019-10-14 23:18:01,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:18:01,851 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:01,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:18:01,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:18:01,851 INFO L87 Difference]: Start difference. First operand 124 states and 153 transitions. Second operand 10 states. [2019-10-14 23:18:04,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:04,520 INFO L93 Difference]: Finished difference Result 141 states and 176 transitions. [2019-10-14 23:18:04,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:18:04,524 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-10-14 23:18:04,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:04,526 INFO L225 Difference]: With dead ends: 141 [2019-10-14 23:18:04,526 INFO L226 Difference]: Without dead ends: 139 [2019-10-14 23:18:04,526 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:18:04,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-10-14 23:18:04,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 130. [2019-10-14 23:18:04,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-10-14 23:18:04,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 159 transitions. [2019-10-14 23:18:04,536 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 159 transitions. Word has length 28 [2019-10-14 23:18:04,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:04,537 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 159 transitions. [2019-10-14 23:18:04,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:18:04,537 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 159 transitions. [2019-10-14 23:18:04,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:18:04,538 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:04,538 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:04,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:04,746 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:04,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:04,747 INFO L82 PathProgramCache]: Analyzing trace with hash 660782437, now seen corresponding path program 2 times [2019-10-14 23:18:04,747 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:04,747 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296897669] [2019-10-14 23:18:04,748 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:04,748 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:04,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:04,752 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:04,752 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259767416] [2019-10-14 23:18:04,752 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 [2019-10-14 23:18:04,796 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:18:04,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:18:04,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-14 23:18:04,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:04,851 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:04,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:04,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:04,853 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:04,853 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:05,050 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2019-10-14 23:18:05,053 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:18:05,078 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296897669] [2019-10-14 23:18:05,078 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:05,078 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259767416] [2019-10-14 23:18:05,079 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:05,079 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:18:05,079 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612357586] [2019-10-14 23:18:05,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:18:05,079 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:05,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:18:05,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:18:05,080 INFO L87 Difference]: Start difference. First operand 130 states and 159 transitions. Second operand 10 states. [2019-10-14 23:18:08,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:08,602 INFO L93 Difference]: Finished difference Result 152 states and 191 transitions. [2019-10-14 23:18:08,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:18:08,602 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-10-14 23:18:08,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:08,604 INFO L225 Difference]: With dead ends: 152 [2019-10-14 23:18:08,604 INFO L226 Difference]: Without dead ends: 150 [2019-10-14 23:18:08,604 INFO L600 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 [2019-10-14 23:18:08,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-10-14 23:18:08,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 131. [2019-10-14 23:18:08,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-10-14 23:18:08,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 161 transitions. [2019-10-14 23:18:08,615 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 161 transitions. Word has length 28 [2019-10-14 23:18:08,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:08,615 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 161 transitions. [2019-10-14 23:18:08,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:18:08,616 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 161 transitions. [2019-10-14 23:18:08,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 23:18:08,616 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:08,617 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:08,820 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:08,821 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:08,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:08,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1615173920, now seen corresponding path program 1 times [2019-10-14 23:18:08,822 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:08,822 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755260566] [2019-10-14 23:18:08,822 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:08,822 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:08,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:08,827 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:08,827 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [591646534] [2019-10-14 23:18:08,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 23:18:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:18:08,855 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:18:08,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:18:08,894 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755260566] [2019-10-14 23:18:08,895 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:08,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591646534] [2019-10-14 23:18:08,895 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:18:08,895 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:18:08,896 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552343600] [2019-10-14 23:18:08,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:18:08,897 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:08,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:18:08,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:18:08,898 INFO L87 Difference]: Start difference. First operand 131 states and 161 transitions. Second operand 6 states. [2019-10-14 23:18:08,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:08,965 INFO L93 Difference]: Finished difference Result 140 states and 170 transitions. [2019-10-14 23:18:08,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:18:08,966 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2019-10-14 23:18:08,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:08,967 INFO L225 Difference]: With dead ends: 140 [2019-10-14 23:18:08,967 INFO L226 Difference]: Without dead ends: 132 [2019-10-14 23:18:08,967 INFO L600 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 [2019-10-14 23:18:08,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-10-14 23:18:08,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2019-10-14 23:18:08,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-10-14 23:18:08,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 158 transitions. [2019-10-14 23:18:08,978 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 158 transitions. Word has length 31 [2019-10-14 23:18:08,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:08,978 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 158 transitions. [2019-10-14 23:18:08,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:18:08,978 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 158 transitions. [2019-10-14 23:18:08,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 23:18:08,979 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:08,979 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:09,182 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:09,182 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:09,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:09,182 INFO L82 PathProgramCache]: Analyzing trace with hash 169189792, now seen corresponding path program 1 times [2019-10-14 23:18:09,183 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:09,183 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413664038] [2019-10-14 23:18:09,183 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:09,183 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:09,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:09,187 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:09,187 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339409337] [2019-10-14 23:18:09,187 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 [2019-10-14 23:18:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:18:09,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:18:09,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:18:09,275 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413664038] [2019-10-14 23:18:09,276 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:09,276 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339409337] [2019-10-14 23:18:09,276 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:09,276 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 23:18:09,276 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507894364] [2019-10-14 23:18:09,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:18:09,277 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:09,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:18:09,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:18:09,278 INFO L87 Difference]: Start difference. First operand 131 states and 158 transitions. Second operand 5 states. [2019-10-14 23:18:09,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:09,367 INFO L93 Difference]: Finished difference Result 186 states and 243 transitions. [2019-10-14 23:18:09,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:18:09,368 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2019-10-14 23:18:09,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:09,370 INFO L225 Difference]: With dead ends: 186 [2019-10-14 23:18:09,370 INFO L226 Difference]: Without dead ends: 152 [2019-10-14 23:18:09,371 INFO L600 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 [2019-10-14 23:18:09,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-10-14 23:18:09,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 146. [2019-10-14 23:18:09,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-10-14 23:18:09,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 179 transitions. [2019-10-14 23:18:09,381 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 179 transitions. Word has length 30 [2019-10-14 23:18:09,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:09,381 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 179 transitions. [2019-10-14 23:18:09,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:18:09,381 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 179 transitions. [2019-10-14 23:18:09,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 23:18:09,382 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:09,382 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:09,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:09,585 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:09,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:09,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1091445474, now seen corresponding path program 1 times [2019-10-14 23:18:09,586 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:09,586 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747034444] [2019-10-14 23:18:09,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:09,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:09,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:09,591 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:09,591 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074541780] [2019-10-14 23:18:09,591 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 [2019-10-14 23:18:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:18:09,619 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:18:09,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:09,636 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:09,651 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:18:09,651 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747034444] [2019-10-14 23:18:09,652 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:09,652 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074541780] [2019-10-14 23:18:09,652 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:09,652 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:18:09,652 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817738405] [2019-10-14 23:18:09,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:18:09,653 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:09,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:18:09,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:18:09,653 INFO L87 Difference]: Start difference. First operand 146 states and 179 transitions. Second operand 7 states. [2019-10-14 23:18:09,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:09,750 INFO L93 Difference]: Finished difference Result 157 states and 192 transitions. [2019-10-14 23:18:09,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:18:09,750 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2019-10-14 23:18:09,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:09,752 INFO L225 Difference]: With dead ends: 157 [2019-10-14 23:18:09,752 INFO L226 Difference]: Without dead ends: 144 [2019-10-14 23:18:09,752 INFO L600 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 [2019-10-14 23:18:09,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-10-14 23:18:09,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 119. [2019-10-14 23:18:09,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-10-14 23:18:09,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 143 transitions. [2019-10-14 23:18:09,763 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 143 transitions. Word has length 31 [2019-10-14 23:18:09,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:09,763 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 143 transitions. [2019-10-14 23:18:09,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:18:09,763 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 143 transitions. [2019-10-14 23:18:09,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 23:18:09,764 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:09,764 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:09,967 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:09,967 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:09,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:09,968 INFO L82 PathProgramCache]: Analyzing trace with hash -909136864, now seen corresponding path program 2 times [2019-10-14 23:18:09,968 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:09,968 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77220999] [2019-10-14 23:18:09,968 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:09,968 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:09,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:09,977 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:09,977 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390340718] [2019-10-14 23:18:09,977 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 [2019-10-14 23:18:10,009 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:18:10,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:18:10,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 23:18:10,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:10,118 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:10,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:18:10,149 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77220999] [2019-10-14 23:18:10,150 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:10,150 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390340718] [2019-10-14 23:18:10,150 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:10,150 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:18:10,150 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573456599] [2019-10-14 23:18:10,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:18:10,151 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:10,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:18:10,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:18:10,151 INFO L87 Difference]: Start difference. First operand 119 states and 143 transitions. Second operand 10 states. [2019-10-14 23:18:10,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:10,686 INFO L93 Difference]: Finished difference Result 161 states and 200 transitions. [2019-10-14 23:18:10,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:18:10,687 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-10-14 23:18:10,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:10,688 INFO L225 Difference]: With dead ends: 161 [2019-10-14 23:18:10,688 INFO L226 Difference]: Without dead ends: 129 [2019-10-14 23:18:10,689 INFO L600 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 [2019-10-14 23:18:10,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-10-14 23:18:10,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 121. [2019-10-14 23:18:10,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-10-14 23:18:10,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 146 transitions. [2019-10-14 23:18:10,697 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 146 transitions. Word has length 30 [2019-10-14 23:18:10,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:10,698 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 146 transitions. [2019-10-14 23:18:10,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:18:10,698 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 146 transitions. [2019-10-14 23:18:10,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 23:18:10,699 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:10,699 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:10,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:10,903 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:10,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:10,903 INFO L82 PathProgramCache]: Analyzing trace with hash -851878562, now seen corresponding path program 2 times [2019-10-14 23:18:10,904 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:10,904 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855288725] [2019-10-14 23:18:10,904 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:10,904 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:10,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:10,908 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:10,909 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701036991] [2019-10-14 23:18:10,909 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 [2019-10-14 23:18:10,942 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:18:10,943 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:18:10,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:18:10,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:10,984 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:10,985 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:10,985 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 23:18:10,985 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:10,986 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:10,986 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:10,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:10,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:10,988 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:10,989 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:18:11,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855288725] [2019-10-14 23:18:11,159 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:11,159 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701036991] [2019-10-14 23:18:11,159 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:11,159 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 23:18:11,159 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529475770] [2019-10-14 23:18:11,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:18:11,160 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:11,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:18:11,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:18:11,160 INFO L87 Difference]: Start difference. First operand 121 states and 146 transitions. Second operand 6 states. [2019-10-14 23:18:11,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:18:11,258 INFO L93 Difference]: Finished difference Result 164 states and 208 transitions. [2019-10-14 23:18:11,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:18:11,260 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-10-14 23:18:11,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:18:11,261 INFO L225 Difference]: With dead ends: 164 [2019-10-14 23:18:11,261 INFO L226 Difference]: Without dead ends: 134 [2019-10-14 23:18:11,262 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:18:11,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-10-14 23:18:11,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 102. [2019-10-14 23:18:11,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-10-14 23:18:11,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 118 transitions. [2019-10-14 23:18:11,277 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 118 transitions. Word has length 30 [2019-10-14 23:18:11,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:18:11,277 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 118 transitions. [2019-10-14 23:18:11,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:18:11,278 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 118 transitions. [2019-10-14 23:18:11,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:18:11,280 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:18:11,280 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:18:11,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:18:11,484 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:18:11,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:18:11,484 INFO L82 PathProgramCache]: Analyzing trace with hash 605616494, now seen corresponding path program 3 times [2019-10-14 23:18:11,485 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:18:11,485 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148999916] [2019-10-14 23:18:11,485 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:11,485 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:18:11,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:18:11,489 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:18:11,490 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204651764] [2019-10-14 23:18:11,490 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 [2019-10-14 23:18:11,538 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 23:18:11,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:18:11,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 23:18:11,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:18:11,570 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,570 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,571 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,571 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,571 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,573 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,574 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,574 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,577 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,577 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,578 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,579 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,580 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,581 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,582 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,583 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,584 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,585 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,586 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,587 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,588 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,589 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,590 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,591 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,592 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,593 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,594 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,596 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,597 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,599 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,599 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,601 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,601 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,602 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,604 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,605 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,605 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,606 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,608 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,611 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,611 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:11,612 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:13,323 WARN L191 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2019-10-14 23:18:13,326 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:18:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 23:18:15,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148999916] [2019-10-14 23:18:15,488 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:18:15,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204651764] [2019-10-14 23:18:15,488 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:18:15,488 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:18:15,488 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647648753] [2019-10-14 23:18:15,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:18:15,489 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:18:15,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:18:15,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=52, Unknown=2, NotChecked=0, Total=72 [2019-10-14 23:18:15,489 INFO L87 Difference]: Start difference. First operand 102 states and 118 transitions. Second operand 9 states.