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/loop-acceleration/array_4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:14:01,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:14:01,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:14:01,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:14:01,694 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:14:01,696 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:14:01,698 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:14:01,710 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:14:01,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:14:01,713 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:14:01,714 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:14:01,717 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:14:01,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:14:01,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:14:01,720 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:14:01,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:14:01,722 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:14:01,722 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:14:01,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:14:01,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:14:01,727 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:14:01,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:14:01,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:14:01,729 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:14:01,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:14:01,738 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:14:01,739 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:14:01,739 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:14:01,740 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:14:01,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:14:01,742 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:14:01,743 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:14:01,743 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:14:01,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:14:01,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:14:01,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:14:01,748 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 23:14:01,768 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:14:01,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:14:01,771 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:14:01,771 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:14:01,771 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:14:01,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:14:01,772 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:14:01,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:14:01,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:14:01,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:14:01,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:14:01,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:14:01,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:14:01,774 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:14:01,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:14:01,775 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:14:01,775 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:14:01,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:14:01,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:14:01,775 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:14:01,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:14:01,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:14:01,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:14:01,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:14:01,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:14:01,777 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:14:01,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:14:01,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:14:01,778 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:14:02,080 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:14:02,092 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:14:02,096 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:14:02,097 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:14:02,098 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:14:02,098 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_4.i [2019-10-14 23:14:02,156 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1edd95e2d/992eca30bf0943abbd45b3fba48ac8da/FLAG0ce2b08a5 [2019-10-14 23:14:02,573 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:14:02,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i [2019-10-14 23:14:02,581 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1edd95e2d/992eca30bf0943abbd45b3fba48ac8da/FLAG0ce2b08a5 [2019-10-14 23:14:02,961 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1edd95e2d/992eca30bf0943abbd45b3fba48ac8da [2019-10-14 23:14:02,971 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:14:02,972 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:14:02,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:14:02,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:14:02,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:14:02,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:14:02" (1/1) ... [2019-10-14 23:14:02,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e90e1fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:02, skipping insertion in model container [2019-10-14 23:14:02,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:14:02" (1/1) ... [2019-10-14 23:14:02,988 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:14:03,003 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:14:03,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:14:03,158 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:14:03,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:14:03,194 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:14:03,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:03 WrapperNode [2019-10-14 23:14:03,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:14:03,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:14:03,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:14:03,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:14:03,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:03" (1/1) ... [2019-10-14 23:14:03,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:03" (1/1) ... [2019-10-14 23:14:03,299 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:03" (1/1) ... [2019-10-14 23:14:03,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:03" (1/1) ... [2019-10-14 23:14:03,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:03" (1/1) ... [2019-10-14 23:14:03,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:03" (1/1) ... [2019-10-14 23:14:03,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:03" (1/1) ... [2019-10-14 23:14:03,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:14:03,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:14:03,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:14:03,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:14:03,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:03" (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 23:14:03,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:14:03,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:14:03,381 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:14:03,381 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:14:03,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:14:03,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:14:03,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:14:03,382 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:14:03,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:14:03,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:14:03,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:14:03,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:14:03,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:14:03,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:14:03,579 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:14:03,579 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-14 23:14:03,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:14:03 BoogieIcfgContainer [2019-10-14 23:14:03,581 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:14:03,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:14:03,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:14:03,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:14:03,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:14:02" (1/3) ... [2019-10-14 23:14:03,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3385ce20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:14:03, skipping insertion in model container [2019-10-14 23:14:03,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:03" (2/3) ... [2019-10-14 23:14:03,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3385ce20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:14:03, skipping insertion in model container [2019-10-14 23:14:03,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:14:03" (3/3) ... [2019-10-14 23:14:03,600 INFO L109 eAbstractionObserver]: Analyzing ICFG array_4.i [2019-10-14 23:14:03,621 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:14:03,636 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:14:03,659 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:14:03,687 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:14:03,687 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:14:03,687 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:14:03,688 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:14:03,688 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:14:03,688 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:14:03,688 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:14:03,688 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:14:03,706 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-14 23:14:03,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-14 23:14:03,713 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:03,714 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:03,716 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:03,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:03,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1816719235, now seen corresponding path program 1 times [2019-10-14 23:14:03,731 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:03,732 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008459322] [2019-10-14 23:14:03,732 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:03,732 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:03,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:03,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:03,885 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 23:14:03,886 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008459322] [2019-10-14 23:14:03,887 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:14:03,887 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:14:03,887 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239320534] [2019-10-14 23:14:03,892 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:14:03,892 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:03,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:14:03,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:14:03,909 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-10-14 23:14:04,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:04,015 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2019-10-14 23:14:04,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:14:04,017 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-14 23:14:04,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:04,028 INFO L225 Difference]: With dead ends: 40 [2019-10-14 23:14:04,028 INFO L226 Difference]: Without dead ends: 17 [2019-10-14 23:14:04,035 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:14:04,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-14 23:14:04,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-14 23:14:04,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-14 23:14:04,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-10-14 23:14:04,086 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2019-10-14 23:14:04,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:04,087 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-10-14 23:14:04,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:14:04,087 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-10-14 23:14:04,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 23:14:04,088 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:04,088 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:04,089 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:04,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:04,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1663088498, now seen corresponding path program 1 times [2019-10-14 23:14:04,090 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:04,090 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385554169] [2019-10-14 23:14:04,090 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:04,090 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:04,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:04,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:04,169 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 23:14:04,169 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385554169] [2019-10-14 23:14:04,170 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:14:04,170 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:14:04,170 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529329530] [2019-10-14 23:14:04,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:14:04,172 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:04,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:14:04,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:14:04,173 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2019-10-14 23:14:04,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:04,238 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2019-10-14 23:14:04,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:14:04,238 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-14 23:14:04,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:04,241 INFO L225 Difference]: With dead ends: 32 [2019-10-14 23:14:04,242 INFO L226 Difference]: Without dead ends: 23 [2019-10-14 23:14:04,242 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:14:04,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-14 23:14:04,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2019-10-14 23:14:04,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-14 23:14:04,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-10-14 23:14:04,250 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2019-10-14 23:14:04,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:04,250 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-10-14 23:14:04,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:14:04,251 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-10-14 23:14:04,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 23:14:04,251 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:04,252 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:04,252 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:04,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:04,252 INFO L82 PathProgramCache]: Analyzing trace with hash 845539860, now seen corresponding path program 1 times [2019-10-14 23:14:04,253 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:04,253 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636780835] [2019-10-14 23:14:04,253 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:04,254 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:04,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:04,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:14:04,357 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636780835] [2019-10-14 23:14:04,359 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:14:04,360 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:14:04,360 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492024411] [2019-10-14 23:14:04,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:14:04,361 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:04,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:14:04,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:14:04,362 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2019-10-14 23:14:04,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:04,466 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-10-14 23:14:04,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:14:04,467 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-10-14 23:14:04,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:04,468 INFO L225 Difference]: With dead ends: 27 [2019-10-14 23:14:04,468 INFO L226 Difference]: Without dead ends: 22 [2019-10-14 23:14:04,469 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:14:04,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-14 23:14:04,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2019-10-14 23:14:04,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-14 23:14:04,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-10-14 23:14:04,474 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2019-10-14 23:14:04,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:04,474 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-10-14 23:14:04,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:14:04,474 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-10-14 23:14:04,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 23:14:04,475 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:04,475 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:04,476 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:04,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:04,476 INFO L82 PathProgramCache]: Analyzing trace with hash 221784433, now seen corresponding path program 1 times [2019-10-14 23:14:04,476 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:04,477 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173406528] [2019-10-14 23:14:04,477 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:04,477 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:04,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:14:04,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173406528] [2019-10-14 23:14:04,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701832424] [2019-10-14 23:14:04,597 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 23:14:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:04,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:14:04,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:14:04,712 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:04,713 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-10-14 23:14:04,713 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628406988] [2019-10-14 23:14:04,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:14:04,714 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:04,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:14:04,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:14:04,715 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2019-10-14 23:14:04,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:04,847 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2019-10-14 23:14:04,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:14:04,847 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2019-10-14 23:14:04,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:04,848 INFO L225 Difference]: With dead ends: 41 [2019-10-14 23:14:04,848 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 23:14:04,849 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:14:04,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 23:14:04,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2019-10-14 23:14:04,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-14 23:14:04,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-10-14 23:14:04,855 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2019-10-14 23:14:04,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:04,855 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-10-14 23:14:04,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:14:04,855 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-10-14 23:14:04,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 23:14:04,856 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:04,856 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:05,060 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:05,060 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:05,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:05,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1899315606, now seen corresponding path program 2 times [2019-10-14 23:14:05,061 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:05,062 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569677161] [2019-10-14 23:14:05,062 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:05,063 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:05,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:05,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:14:05,197 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569677161] [2019-10-14 23:14:05,197 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650144705] [2019-10-14 23:14:05,198 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 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 23:14:05,234 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:14:05,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:05,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:14:05,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 23:14:05,258 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:05,258 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2019-10-14 23:14:05,259 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803047579] [2019-10-14 23:14:05,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:14:05,259 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:05,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:14:05,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:14:05,260 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 9 states. [2019-10-14 23:14:05,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:05,365 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2019-10-14 23:14:05,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:14:05,366 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-10-14 23:14:05,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:05,367 INFO L225 Difference]: With dead ends: 49 [2019-10-14 23:14:05,367 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 23:14:05,368 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:14:05,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 23:14:05,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-10-14 23:14:05,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:14:05,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-10-14 23:14:05,374 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 24 [2019-10-14 23:14:05,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:05,374 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-10-14 23:14:05,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:14:05,374 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-10-14 23:14:05,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 23:14:05,375 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:05,375 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:05,579 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:05,580 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:05,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:05,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2019962701, now seen corresponding path program 3 times [2019-10-14 23:14:05,581 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:05,582 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546621347] [2019-10-14 23:14:05,582 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:05,582 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:05,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:05,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:14:05,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546621347] [2019-10-14 23:14:05,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042311643] [2019-10-14 23:14:05,672 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 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 23:14:05,720 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:14:05,721 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:05,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:14:05,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:05,742 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:14:05,742 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:05,743 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 10 [2019-10-14 23:14:05,743 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118437564] [2019-10-14 23:14:05,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:14:05,744 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:05,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:14:05,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:14:05,746 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2019-10-14 23:14:05,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:05,887 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2019-10-14 23:14:05,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:14:05,888 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2019-10-14 23:14:05,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:05,889 INFO L225 Difference]: With dead ends: 57 [2019-10-14 23:14:05,889 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 23:14:05,891 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:14:05,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 23:14:05,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2019-10-14 23:14:05,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 23:14:05,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-10-14 23:14:05,901 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 29 [2019-10-14 23:14:05,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:05,901 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-10-14 23:14:05,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:14:05,904 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-10-14 23:14:05,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:14:05,905 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:05,906 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:06,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:06,107 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:06,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:06,107 INFO L82 PathProgramCache]: Analyzing trace with hash -73516102, now seen corresponding path program 4 times [2019-10-14 23:14:06,108 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:06,108 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432679745] [2019-10-14 23:14:06,108 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:06,108 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:06,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:14:06,218 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432679745] [2019-10-14 23:14:06,219 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638820932] [2019-10-14 23:14:06,219 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:14:06,283 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:14:06,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:06,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:14:06,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-14 23:14:06,317 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:06,317 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2019-10-14 23:14:06,319 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496293881] [2019-10-14 23:14:06,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:14:06,320 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:06,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:14:06,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:14:06,321 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 11 states. [2019-10-14 23:14:06,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:06,458 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2019-10-14 23:14:06,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:14:06,458 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2019-10-14 23:14:06,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:06,459 INFO L225 Difference]: With dead ends: 65 [2019-10-14 23:14:06,459 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 23:14:06,460 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:14:06,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 23:14:06,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2019-10-14 23:14:06,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 23:14:06,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2019-10-14 23:14:06,466 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 34 [2019-10-14 23:14:06,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:06,466 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2019-10-14 23:14:06,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:14:06,466 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2019-10-14 23:14:06,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 23:14:06,467 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:06,468 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:06,677 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:06,678 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:06,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:06,679 INFO L82 PathProgramCache]: Analyzing trace with hash -669211351, now seen corresponding path program 5 times [2019-10-14 23:14:06,679 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:06,679 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105820364] [2019-10-14 23:14:06,680 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:06,680 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:06,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 23:14:06,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105820364] [2019-10-14 23:14:06,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251936104] [2019-10-14 23:14:06,814 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:14:06,862 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 23:14:06,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:06,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:14:06,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:06,889 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-14 23:14:06,890 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:06,890 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2019-10-14 23:14:06,890 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879935236] [2019-10-14 23:14:06,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:14:06,891 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:06,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:14:06,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:14:06,892 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 12 states. [2019-10-14 23:14:07,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:07,022 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2019-10-14 23:14:07,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:14:07,022 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2019-10-14 23:14:07,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:07,023 INFO L225 Difference]: With dead ends: 73 [2019-10-14 23:14:07,023 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 23:14:07,024 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:14:07,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 23:14:07,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-10-14 23:14:07,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 23:14:07,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2019-10-14 23:14:07,030 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 39 [2019-10-14 23:14:07,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:07,030 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2019-10-14 23:14:07,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:14:07,030 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2019-10-14 23:14:07,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-14 23:14:07,031 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:07,032 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:07,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:07,233 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:07,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:07,234 INFO L82 PathProgramCache]: Analyzing trace with hash -37624354, now seen corresponding path program 6 times [2019-10-14 23:14:07,235 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:07,235 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043426249] [2019-10-14 23:14:07,236 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:07,236 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:07,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:07,359 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 23:14:07,360 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043426249] [2019-10-14 23:14:07,360 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385186482] [2019-10-14 23:14:07,360 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:14:07,426 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 23:14:07,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:07,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:14:07,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:07,447 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:14:07,469 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 23:14:07,469 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:07,470 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2019-10-14 23:14:07,470 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853540566] [2019-10-14 23:14:07,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:14:07,471 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:07,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:14:07,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:14:07,471 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2019-10-14 23:14:07,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:07,607 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2019-10-14 23:14:07,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:14:07,607 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2019-10-14 23:14:07,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:07,608 INFO L225 Difference]: With dead ends: 81 [2019-10-14 23:14:07,608 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 23:14:07,609 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:14:07,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 23:14:07,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2019-10-14 23:14:07,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-14 23:14:07,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-10-14 23:14:07,615 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 44 [2019-10-14 23:14:07,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:07,615 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-10-14 23:14:07,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:14:07,616 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-10-14 23:14:07,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 23:14:07,617 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:07,617 INFO L380 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:07,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:07,821 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:07,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:07,821 INFO L82 PathProgramCache]: Analyzing trace with hash 37047045, now seen corresponding path program 7 times [2019-10-14 23:14:07,822 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:07,822 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042296276] [2019-10-14 23:14:07,822 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:07,822 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:07,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-14 23:14:07,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042296276] [2019-10-14 23:14:07,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420237025] [2019-10-14 23:14:07,975 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:14:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:08,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:14:08,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-14 23:14:08,040 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:08,040 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 14 [2019-10-14 23:14:08,040 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114225513] [2019-10-14 23:14:08,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:14:08,041 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:08,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:14:08,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:14:08,042 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 14 states. [2019-10-14 23:14:08,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:08,173 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2019-10-14 23:14:08,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:14:08,173 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2019-10-14 23:14:08,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:08,174 INFO L225 Difference]: With dead ends: 89 [2019-10-14 23:14:08,174 INFO L226 Difference]: Without dead ends: 57 [2019-10-14 23:14:08,175 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:14:08,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-14 23:14:08,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2019-10-14 23:14:08,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-14 23:14:08,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2019-10-14 23:14:08,181 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 49 [2019-10-14 23:14:08,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:08,181 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2019-10-14 23:14:08,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:14:08,182 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2019-10-14 23:14:08,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-14 23:14:08,183 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:08,183 INFO L380 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:08,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:08,387 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:08,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:08,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1182367742, now seen corresponding path program 8 times [2019-10-14 23:14:08,388 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:08,388 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61614746] [2019-10-14 23:14:08,389 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:08,389 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:08,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 23:14:08,515 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61614746] [2019-10-14 23:14:08,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321896043] [2019-10-14 23:14:08,516 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 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 23:14:08,559 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:14:08,560 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:08,560 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:14:08,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:08,579 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-14 23:14:08,580 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:08,580 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 15 [2019-10-14 23:14:08,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391229638] [2019-10-14 23:14:08,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:14:08,581 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:08,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:14:08,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:14:08,582 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 15 states. [2019-10-14 23:14:08,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:08,723 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2019-10-14 23:14:08,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:14:08,723 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2019-10-14 23:14:08,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:08,724 INFO L225 Difference]: With dead ends: 97 [2019-10-14 23:14:08,725 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 23:14:08,726 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:14:08,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 23:14:08,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2019-10-14 23:14:08,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-14 23:14:08,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2019-10-14 23:14:08,735 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 54 [2019-10-14 23:14:08,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:08,735 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2019-10-14 23:14:08,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:14:08,735 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2019-10-14 23:14:08,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-14 23:14:08,736 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:08,736 INFO L380 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:08,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:08,942 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:08,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:08,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1274421023, now seen corresponding path program 9 times [2019-10-14 23:14:08,944 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:08,944 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081164845] [2019-10-14 23:14:08,944 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:08,944 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:08,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:09,117 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 23:14:09,118 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081164845] [2019-10-14 23:14:09,118 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946963206] [2019-10-14 23:14:09,118 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 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 23:14:09,291 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-14 23:14:09,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:09,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 23:14:09,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:09,323 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:14:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 23:14:09,357 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:09,358 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2019-10-14 23:14:09,358 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382120833] [2019-10-14 23:14:09,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:14:09,359 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:09,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:14:09,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:14:09,360 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 18 states. [2019-10-14 23:14:09,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:09,540 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2019-10-14 23:14:09,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 23:14:09,540 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2019-10-14 23:14:09,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:09,541 INFO L225 Difference]: With dead ends: 105 [2019-10-14 23:14:09,541 INFO L226 Difference]: Without dead ends: 67 [2019-10-14 23:14:09,544 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:14:09,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-14 23:14:09,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-10-14 23:14:09,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-14 23:14:09,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2019-10-14 23:14:09,553 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 59 [2019-10-14 23:14:09,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:09,554 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2019-10-14 23:14:09,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 23:14:09,554 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2019-10-14 23:14:09,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-14 23:14:09,555 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:09,555 INFO L380 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:09,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:09,766 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:09,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:09,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1532119590, now seen corresponding path program 10 times [2019-10-14 23:14:09,767 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:09,767 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449127559] [2019-10-14 23:14:09,767 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:09,767 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:09,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-14 23:14:09,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449127559] [2019-10-14 23:14:09,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883861894] [2019-10-14 23:14:09,941 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:14:10,003 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:14:10,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:10,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 23:14:10,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-10-14 23:14:10,037 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:10,037 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 17 [2019-10-14 23:14:10,037 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896306590] [2019-10-14 23:14:10,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 23:14:10,038 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:10,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 23:14:10,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:14:10,039 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 17 states. [2019-10-14 23:14:10,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:10,186 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2019-10-14 23:14:10,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 23:14:10,187 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 64 [2019-10-14 23:14:10,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:10,188 INFO L225 Difference]: With dead ends: 113 [2019-10-14 23:14:10,188 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 23:14:10,189 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:14:10,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 23:14:10,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-10-14 23:14:10,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-14 23:14:10,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2019-10-14 23:14:10,196 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 64 [2019-10-14 23:14:10,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:10,196 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2019-10-14 23:14:10,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 23:14:10,196 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2019-10-14 23:14:10,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-14 23:14:10,198 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:10,198 INFO L380 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:10,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:10,402 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:10,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:10,402 INFO L82 PathProgramCache]: Analyzing trace with hash -294377795, now seen corresponding path program 11 times [2019-10-14 23:14:10,403 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:10,403 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125748248] [2019-10-14 23:14:10,404 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:10,404 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:10,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:10,570 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-14 23:14:10,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125748248] [2019-10-14 23:14:10,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005241779] [2019-10-14 23:14:10,570 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:14:10,656 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-14 23:14:10,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:10,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:14:10,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 23:14:10,696 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:10,696 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 18 [2019-10-14 23:14:10,696 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565641125] [2019-10-14 23:14:10,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:14:10,697 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:10,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:14:10,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:14:10,698 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 18 states. [2019-10-14 23:14:10,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:10,861 INFO L93 Difference]: Finished difference Result 121 states and 124 transitions. [2019-10-14 23:14:10,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:14:10,862 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2019-10-14 23:14:10,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:10,863 INFO L225 Difference]: With dead ends: 121 [2019-10-14 23:14:10,863 INFO L226 Difference]: Without dead ends: 77 [2019-10-14 23:14:10,864 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:14:10,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-14 23:14:10,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2019-10-14 23:14:10,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-14 23:14:10,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2019-10-14 23:14:10,869 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 69 [2019-10-14 23:14:10,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:10,869 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2019-10-14 23:14:10,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 23:14:10,870 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2019-10-14 23:14:10,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-14 23:14:10,871 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:10,871 INFO L380 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:11,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:11,075 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:11,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:11,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1643412406, now seen corresponding path program 12 times [2019-10-14 23:14:11,076 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:11,077 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901852499] [2019-10-14 23:14:11,077 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:11,077 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:11,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-14 23:14:11,250 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901852499] [2019-10-14 23:14:11,250 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934898317] [2019-10-14 23:14:11,251 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:14:11,562 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 23:14:11,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:11,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 23:14:11,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:11,587 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:14:11,638 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-14 23:14:11,639 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:11,639 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 21 [2019-10-14 23:14:11,639 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124505350] [2019-10-14 23:14:11,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 23:14:11,640 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:11,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 23:14:11,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:14:11,641 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 21 states. [2019-10-14 23:14:11,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:11,814 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2019-10-14 23:14:11,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 23:14:11,814 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 74 [2019-10-14 23:14:11,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:11,816 INFO L225 Difference]: With dead ends: 129 [2019-10-14 23:14:11,816 INFO L226 Difference]: Without dead ends: 82 [2019-10-14 23:14:11,817 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:14:11,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-14 23:14:11,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2019-10-14 23:14:11,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-10-14 23:14:11,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2019-10-14 23:14:11,823 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 74 [2019-10-14 23:14:11,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:11,823 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2019-10-14 23:14:11,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 23:14:11,823 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2019-10-14 23:14:11,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-14 23:14:11,824 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:11,824 INFO L380 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:12,028 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:12,029 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:12,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:12,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1372445849, now seen corresponding path program 13 times [2019-10-14 23:14:12,030 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:12,030 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801231312] [2019-10-14 23:14:12,031 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:12,031 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:12,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:12,225 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-10-14 23:14:12,225 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801231312] [2019-10-14 23:14:12,226 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244855767] [2019-10-14 23:14:12,226 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:14:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:12,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:14:12,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-10-14 23:14:12,309 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:12,309 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 20 [2019-10-14 23:14:12,309 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696194480] [2019-10-14 23:14:12,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:14:12,310 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:12,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:14:12,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:14:12,311 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 20 states. [2019-10-14 23:14:12,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:12,568 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2019-10-14 23:14:12,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:14:12,568 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2019-10-14 23:14:12,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:12,569 INFO L225 Difference]: With dead ends: 137 [2019-10-14 23:14:12,569 INFO L226 Difference]: Without dead ends: 87 [2019-10-14 23:14:12,570 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2019-10-14 23:14:12,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-10-14 23:14:12,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2019-10-14 23:14:12,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-10-14 23:14:12,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2019-10-14 23:14:12,577 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 79 [2019-10-14 23:14:12,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:12,577 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2019-10-14 23:14:12,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:14:12,577 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2019-10-14 23:14:12,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-10-14 23:14:12,578 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:12,578 INFO L380 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:12,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:12,783 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:12,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:12,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1863872110, now seen corresponding path program 14 times [2019-10-14 23:14:12,784 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:12,784 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841155102] [2019-10-14 23:14:12,784 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:12,784 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:12,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:12,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:13,001 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-10-14 23:14:13,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841155102] [2019-10-14 23:14:13,002 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087840032] [2019-10-14 23:14:13,002 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 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 23:14:13,060 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:14:13,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:13,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 23:14:13,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:13,099 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-10-14 23:14:13,100 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:13,100 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 21 [2019-10-14 23:14:13,100 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026607042] [2019-10-14 23:14:13,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 23:14:13,101 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:13,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 23:14:13,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:14:13,102 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 21 states. [2019-10-14 23:14:13,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:13,256 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2019-10-14 23:14:13,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:14:13,257 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2019-10-14 23:14:13,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:13,258 INFO L225 Difference]: With dead ends: 145 [2019-10-14 23:14:13,258 INFO L226 Difference]: Without dead ends: 92 [2019-10-14 23:14:13,258 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:14:13,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-14 23:14:13,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2019-10-14 23:14:13,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-14 23:14:13,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2019-10-14 23:14:13,263 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 84 [2019-10-14 23:14:13,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:13,264 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2019-10-14 23:14:13,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 23:14:13,264 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2019-10-14 23:14:13,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-14 23:14:13,265 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:13,265 INFO L380 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:13,466 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:13,466 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:13,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:13,467 INFO L82 PathProgramCache]: Analyzing trace with hash 2045821557, now seen corresponding path program 15 times [2019-10-14 23:14:13,467 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:13,468 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664492831] [2019-10-14 23:14:13,468 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:13,468 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:13,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:13,675 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-14 23:14:13,675 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664492831] [2019-10-14 23:14:13,675 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623010822] [2019-10-14 23:14:13,676 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 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 23:14:14,021 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-10-14 23:14:14,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:14,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 23:14:14,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-10-14 23:14:14,047 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:14,047 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 22 [2019-10-14 23:14:14,048 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603684553] [2019-10-14 23:14:14,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 23:14:14,048 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:14,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 23:14:14,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2019-10-14 23:14:14,049 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 22 states. [2019-10-14 23:14:14,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:14,240 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2019-10-14 23:14:14,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 23:14:14,240 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 89 [2019-10-14 23:14:14,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:14,241 INFO L225 Difference]: With dead ends: 153 [2019-10-14 23:14:14,241 INFO L226 Difference]: Without dead ends: 97 [2019-10-14 23:14:14,241 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:14:14,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-10-14 23:14:14,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-10-14 23:14:14,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-14 23:14:14,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2019-10-14 23:14:14,245 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 89 [2019-10-14 23:14:14,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:14,245 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2019-10-14 23:14:14,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 23:14:14,245 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2019-10-14 23:14:14,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-14 23:14:14,247 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:14,247 INFO L380 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:14,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:14,452 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:14,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:14,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1839249262, now seen corresponding path program 16 times [2019-10-14 23:14:14,453 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:14,453 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116154848] [2019-10-14 23:14:14,453 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:14,454 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:14,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-10-14 23:14:14,674 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116154848] [2019-10-14 23:14:14,674 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601563482] [2019-10-14 23:14:14,674 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:14:14,736 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:14:14,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:14,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 23:14:14,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-10-14 23:14:14,763 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:14,763 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 23 [2019-10-14 23:14:14,763 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713692435] [2019-10-14 23:14:14,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 23:14:14,764 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:14,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 23:14:14,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:14:14,765 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 23 states. [2019-10-14 23:14:14,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:14,938 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2019-10-14 23:14:14,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 23:14:14,938 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 94 [2019-10-14 23:14:14,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:14,939 INFO L225 Difference]: With dead ends: 161 [2019-10-14 23:14:14,939 INFO L226 Difference]: Without dead ends: 102 [2019-10-14 23:14:14,940 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:14:14,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-10-14 23:14:14,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2019-10-14 23:14:14,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-10-14 23:14:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2019-10-14 23:14:14,944 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 94 [2019-10-14 23:14:14,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:14,944 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2019-10-14 23:14:14,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 23:14:14,944 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2019-10-14 23:14:14,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-14 23:14:14,945 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:14,945 INFO L380 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:15,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:15,147 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:15,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:15,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1513527377, now seen corresponding path program 17 times [2019-10-14 23:14:15,147 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:15,148 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939939060] [2019-10-14 23:14:15,148 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:15,148 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:15,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-10-14 23:14:15,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939939060] [2019-10-14 23:14:15,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823778050] [2019-10-14 23:14:15,407 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:14:15,574 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-10-14 23:14:15,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:15,576 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 23:14:15,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-10-14 23:14:15,613 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:15,613 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 24 [2019-10-14 23:14:15,613 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118893096] [2019-10-14 23:14:15,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:14:15,614 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:15,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:14:15,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:14:15,615 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 24 states. [2019-10-14 23:14:15,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:15,797 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2019-10-14 23:14:15,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 23:14:15,797 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2019-10-14 23:14:15,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:15,798 INFO L225 Difference]: With dead ends: 169 [2019-10-14 23:14:15,799 INFO L226 Difference]: Without dead ends: 107 [2019-10-14 23:14:15,800 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2019-10-14 23:14:15,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-14 23:14:15,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2019-10-14 23:14:15,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-14 23:14:15,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2019-10-14 23:14:15,804 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 99 [2019-10-14 23:14:15,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:15,804 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2019-10-14 23:14:15,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:14:15,805 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2019-10-14 23:14:15,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-14 23:14:15,806 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:15,806 INFO L380 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:16,011 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:16,011 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:16,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:16,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1179013814, now seen corresponding path program 18 times [2019-10-14 23:14:16,013 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:16,013 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539943970] [2019-10-14 23:14:16,013 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:16,013 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:16,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:16,247 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-10-14 23:14:16,247 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539943970] [2019-10-14 23:14:16,247 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845526760] [2019-10-14 23:14:16,247 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:14:17,347 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-14 23:14:17,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:17,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-14 23:14:17,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-10-14 23:14:17,379 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:17,379 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 25 [2019-10-14 23:14:17,379 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39045095] [2019-10-14 23:14:17,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 23:14:17,380 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:17,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 23:14:17,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:14:17,381 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 25 states. [2019-10-14 23:14:17,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:17,608 INFO L93 Difference]: Finished difference Result 177 states and 180 transitions. [2019-10-14 23:14:17,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 23:14:17,608 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 104 [2019-10-14 23:14:17,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:17,609 INFO L225 Difference]: With dead ends: 177 [2019-10-14 23:14:17,609 INFO L226 Difference]: Without dead ends: 112 [2019-10-14 23:14:17,610 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:14:17,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-10-14 23:14:17,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2019-10-14 23:14:17,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-10-14 23:14:17,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2019-10-14 23:14:17,614 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 104 [2019-10-14 23:14:17,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:17,615 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2019-10-14 23:14:17,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 23:14:17,615 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2019-10-14 23:14:17,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-14 23:14:17,616 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:17,616 INFO L380 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:17,825 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:17,826 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:17,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:17,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1720115667, now seen corresponding path program 19 times [2019-10-14 23:14:17,829 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:17,829 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792881673] [2019-10-14 23:14:17,829 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:17,829 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:17,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-10-14 23:14:18,117 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792881673] [2019-10-14 23:14:18,117 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167231846] [2019-10-14 23:14:18,117 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:14:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:18,187 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 23:14:18,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-10-14 23:14:18,209 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:18,209 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 26 [2019-10-14 23:14:18,209 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744844988] [2019-10-14 23:14:18,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 23:14:18,210 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:18,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 23:14:18,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2019-10-14 23:14:18,211 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 26 states. [2019-10-14 23:14:18,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:18,429 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2019-10-14 23:14:18,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 23:14:18,431 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 109 [2019-10-14 23:14:18,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:18,432 INFO L225 Difference]: With dead ends: 185 [2019-10-14 23:14:18,432 INFO L226 Difference]: Without dead ends: 117 [2019-10-14 23:14:18,433 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:14:18,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-14 23:14:18,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2019-10-14 23:14:18,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-10-14 23:14:18,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2019-10-14 23:14:18,437 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 109 [2019-10-14 23:14:18,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:18,437 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2019-10-14 23:14:18,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 23:14:18,437 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2019-10-14 23:14:18,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-14 23:14:18,438 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:18,438 INFO L380 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:18,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:18,645 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:18,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:18,646 INFO L82 PathProgramCache]: Analyzing trace with hash -407647014, now seen corresponding path program 20 times [2019-10-14 23:14:18,646 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:18,646 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336149753] [2019-10-14 23:14:18,646 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:18,647 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:18,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:18,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 23:14:18,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336149753] [2019-10-14 23:14:18,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329161190] [2019-10-14 23:14:18,963 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 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 23:14:19,042 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:14:19,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:19,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 23:14:19,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-10-14 23:14:19,071 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:19,071 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 27 [2019-10-14 23:14:19,071 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757628045] [2019-10-14 23:14:19,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:14:19,073 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:19,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:14:19,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:14:19,074 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 27 states. [2019-10-14 23:14:19,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:19,319 INFO L93 Difference]: Finished difference Result 193 states and 196 transitions. [2019-10-14 23:14:19,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 23:14:19,320 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 114 [2019-10-14 23:14:19,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:19,321 INFO L225 Difference]: With dead ends: 193 [2019-10-14 23:14:19,321 INFO L226 Difference]: Without dead ends: 122 [2019-10-14 23:14:19,322 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2019-10-14 23:14:19,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-10-14 23:14:19,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2019-10-14 23:14:19,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-10-14 23:14:19,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2019-10-14 23:14:19,327 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 114 [2019-10-14 23:14:19,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:19,327 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2019-10-14 23:14:19,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 23:14:19,328 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2019-10-14 23:14:19,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-14 23:14:19,328 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:19,329 INFO L380 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:19,532 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:19,532 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:19,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:19,533 INFO L82 PathProgramCache]: Analyzing trace with hash -300805111, now seen corresponding path program 21 times [2019-10-14 23:14:19,533 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:19,534 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535772477] [2019-10-14 23:14:19,534 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:19,534 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:19,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-10-14 23:14:19,999 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535772477] [2019-10-14 23:14:19,999 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002177069] [2019-10-14 23:14:20,000 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 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 23:14:22,479 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-10-14 23:14:22,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:22,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:14:22,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-10-14 23:14:22,506 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:22,506 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 28 [2019-10-14 23:14:22,506 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214670419] [2019-10-14 23:14:22,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 23:14:22,507 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:22,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 23:14:22,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:14:22,508 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 28 states. [2019-10-14 23:14:22,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:22,735 INFO L93 Difference]: Finished difference Result 201 states and 204 transitions. [2019-10-14 23:14:22,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 23:14:22,735 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 119 [2019-10-14 23:14:22,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:22,736 INFO L225 Difference]: With dead ends: 201 [2019-10-14 23:14:22,736 INFO L226 Difference]: Without dead ends: 127 [2019-10-14 23:14:22,738 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2019-10-14 23:14:22,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-10-14 23:14:22,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2019-10-14 23:14:22,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-14 23:14:22,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2019-10-14 23:14:22,742 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 119 [2019-10-14 23:14:22,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:22,743 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2019-10-14 23:14:22,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 23:14:22,743 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2019-10-14 23:14:22,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-14 23:14:22,744 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:22,744 INFO L380 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:22,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:22,950 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:22,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:22,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1777469698, now seen corresponding path program 22 times [2019-10-14 23:14:22,951 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:22,951 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417117200] [2019-10-14 23:14:22,951 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:22,952 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:22,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:23,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-10-14 23:14:23,433 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417117200] [2019-10-14 23:14:23,433 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593494370] [2019-10-14 23:14:23,433 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:14:23,556 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:14:23,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:23,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 23:14:23,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2019-10-14 23:14:23,632 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:23,632 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 29 [2019-10-14 23:14:23,632 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427311736] [2019-10-14 23:14:23,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-14 23:14:23,633 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:23,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-14 23:14:23,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2019-10-14 23:14:23,634 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 29 states. [2019-10-14 23:14:23,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:23,929 INFO L93 Difference]: Finished difference Result 209 states and 212 transitions. [2019-10-14 23:14:23,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 23:14:23,930 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 124 [2019-10-14 23:14:23,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:23,931 INFO L225 Difference]: With dead ends: 209 [2019-10-14 23:14:23,931 INFO L226 Difference]: Without dead ends: 132 [2019-10-14 23:14:23,932 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=341, Invalid=589, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:14:23,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-10-14 23:14:23,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2019-10-14 23:14:23,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-10-14 23:14:23,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2019-10-14 23:14:23,937 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 124 [2019-10-14 23:14:23,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:23,937 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2019-10-14 23:14:23,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-14 23:14:23,937 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2019-10-14 23:14:23,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-14 23:14:23,938 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:23,938 INFO L380 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:24,141 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:24,142 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:24,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:24,142 INFO L82 PathProgramCache]: Analyzing trace with hash 2044410341, now seen corresponding path program 23 times [2019-10-14 23:14:24,142 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:24,143 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030195467] [2019-10-14 23:14:24,143 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:24,143 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:24,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:24,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-10-14 23:14:24,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030195467] [2019-10-14 23:14:24,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961220785] [2019-10-14 23:14:24,604 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:14:24,998 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-10-14 23:14:24,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:25,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 23:14:25,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-10-14 23:14:25,027 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:25,027 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 30 [2019-10-14 23:14:25,027 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052704941] [2019-10-14 23:14:25,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 23:14:25,027 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:25,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 23:14:25,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2019-10-14 23:14:25,028 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 30 states. [2019-10-14 23:14:25,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:25,272 INFO L93 Difference]: Finished difference Result 217 states and 220 transitions. [2019-10-14 23:14:25,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 23:14:25,273 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 129 [2019-10-14 23:14:25,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:25,274 INFO L225 Difference]: With dead ends: 217 [2019-10-14 23:14:25,274 INFO L226 Difference]: Without dead ends: 137 [2019-10-14 23:14:25,275 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=367, Invalid=625, Unknown=0, NotChecked=0, Total=992 [2019-10-14 23:14:25,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-10-14 23:14:25,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2019-10-14 23:14:25,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-10-14 23:14:25,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2019-10-14 23:14:25,280 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 129 [2019-10-14 23:14:25,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:25,280 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2019-10-14 23:14:25,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 23:14:25,280 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2019-10-14 23:14:25,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-14 23:14:25,281 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:25,281 INFO L380 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:25,486 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:25,486 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:25,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:25,487 INFO L82 PathProgramCache]: Analyzing trace with hash -683994846, now seen corresponding path program 24 times [2019-10-14 23:14:25,487 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:25,487 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001780471] [2019-10-14 23:14:25,488 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:25,488 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:25,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:25,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-10-14 23:14:25,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001780471] [2019-10-14 23:14:25,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795659519] [2019-10-14 23:14:25,907 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:30,317 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-10-14 23:14:30,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:30,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 23:14:30,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:30,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2019-10-14 23:14:30,351 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:30,351 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27] total 31 [2019-10-14 23:14:30,351 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442210912] [2019-10-14 23:14:30,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 23:14:30,352 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:30,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 23:14:30,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:14:30,352 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 31 states. [2019-10-14 23:14:30,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:30,653 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2019-10-14 23:14:30,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 23:14:30,653 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 134 [2019-10-14 23:14:30,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:30,654 INFO L225 Difference]: With dead ends: 225 [2019-10-14 23:14:30,654 INFO L226 Difference]: Without dead ends: 142 [2019-10-14 23:14:30,655 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:14:30,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-10-14 23:14:30,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2019-10-14 23:14:30,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-10-14 23:14:30,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2019-10-14 23:14:30,660 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 134 [2019-10-14 23:14:30,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:30,661 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2019-10-14 23:14:30,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 23:14:30,661 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2019-10-14 23:14:30,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-14 23:14:30,662 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:30,662 INFO L380 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:30,867 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:30,868 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:30,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:30,869 INFO L82 PathProgramCache]: Analyzing trace with hash 640569281, now seen corresponding path program 25 times [2019-10-14 23:14:30,869 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:30,869 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896451930] [2019-10-14 23:14:30,869 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:30,870 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:30,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:31,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:31,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-10-14 23:14:31,309 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896451930] [2019-10-14 23:14:31,309 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53552979] [2019-10-14 23:14:31,309 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:31,396 INFO L256 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 23:14:31,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2019-10-14 23:14:31,427 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:31,427 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28] total 32 [2019-10-14 23:14:31,427 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411479240] [2019-10-14 23:14:31,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 23:14:31,428 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:31,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 23:14:31,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2019-10-14 23:14:31,429 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand 32 states. [2019-10-14 23:14:31,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:31,664 INFO L93 Difference]: Finished difference Result 233 states and 236 transitions. [2019-10-14 23:14:31,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-14 23:14:31,665 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 139 [2019-10-14 23:14:31,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:31,666 INFO L225 Difference]: With dead ends: 233 [2019-10-14 23:14:31,666 INFO L226 Difference]: Without dead ends: 147 [2019-10-14 23:14:31,667 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=422, Invalid=700, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:14:31,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-10-14 23:14:31,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2019-10-14 23:14:31,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-10-14 23:14:31,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2019-10-14 23:14:31,673 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 139 [2019-10-14 23:14:31,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:31,674 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2019-10-14 23:14:31,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 23:14:31,674 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2019-10-14 23:14:31,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-14 23:14:31,675 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:31,676 INFO L380 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:31,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:31,879 INFO L410 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:31,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:31,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1000430406, now seen corresponding path program 26 times [2019-10-14 23:14:31,880 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:31,880 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995905271] [2019-10-14 23:14:31,881 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:31,881 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:31,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:32,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2019-10-14 23:14:32,388 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995905271] [2019-10-14 23:14:32,388 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385498558] [2019-10-14 23:14:32,388 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:32,482 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:14:32,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:32,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 23:14:32,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:32,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2019-10-14 23:14:32,513 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:32,513 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29] total 33 [2019-10-14 23:14:32,513 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644212695] [2019-10-14 23:14:32,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-14 23:14:32,514 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:32,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-14 23:14:32,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:14:32,515 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 33 states. [2019-10-14 23:14:32,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:32,818 INFO L93 Difference]: Finished difference Result 241 states and 244 transitions. [2019-10-14 23:14:32,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 23:14:32,819 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 144 [2019-10-14 23:14:32,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:32,820 INFO L225 Difference]: With dead ends: 241 [2019-10-14 23:14:32,820 INFO L226 Difference]: Without dead ends: 152 [2019-10-14 23:14:32,822 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=451, Invalid=739, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 23:14:32,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-10-14 23:14:32,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2019-10-14 23:14:32,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-10-14 23:14:32,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2019-10-14 23:14:32,826 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 144 [2019-10-14 23:14:32,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:32,827 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2019-10-14 23:14:32,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-14 23:14:32,827 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2019-10-14 23:14:32,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-14 23:14:32,828 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:32,828 INFO L380 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:33,031 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:33,032 INFO L410 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:33,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:33,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1763939, now seen corresponding path program 27 times [2019-10-14 23:14:33,033 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:33,033 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920420266] [2019-10-14 23:14:33,033 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:33,034 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:33,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2019-10-14 23:14:33,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920420266] [2019-10-14 23:14:33,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953038046] [2019-10-14 23:14:33,631 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:38,353 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-10-14 23:14:38,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:38,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-14 23:14:38,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2019-10-14 23:14:38,411 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:38,411 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 30] total 34 [2019-10-14 23:14:38,411 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567065543] [2019-10-14 23:14:38,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-14 23:14:38,412 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:38,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-14 23:14:38,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:14:38,413 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 34 states. [2019-10-14 23:14:38,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:38,775 INFO L93 Difference]: Finished difference Result 249 states and 252 transitions. [2019-10-14 23:14:38,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-14 23:14:38,775 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 149 [2019-10-14 23:14:38,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:38,777 INFO L225 Difference]: With dead ends: 249 [2019-10-14 23:14:38,777 INFO L226 Difference]: Without dead ends: 157 [2019-10-14 23:14:38,778 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=481, Invalid=779, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 23:14:38,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-10-14 23:14:38,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2019-10-14 23:14:38,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-10-14 23:14:38,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2019-10-14 23:14:38,786 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 149 [2019-10-14 23:14:38,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:38,786 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2019-10-14 23:14:38,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-14 23:14:38,787 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2019-10-14 23:14:38,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-14 23:14:38,788 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:38,789 INFO L380 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:38,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:38,998 INFO L410 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:38,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:38,999 INFO L82 PathProgramCache]: Analyzing trace with hash 36115818, now seen corresponding path program 28 times [2019-10-14 23:14:38,999 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:38,999 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709321868] [2019-10-14 23:14:39,000 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:39,000 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:39,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:39,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2019-10-14 23:14:39,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709321868] [2019-10-14 23:14:39,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88932587] [2019-10-14 23:14:39,700 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:39,798 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:14:39,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:39,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 23:14:39,803 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2019-10-14 23:14:39,840 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:39,840 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31] total 35 [2019-10-14 23:14:39,840 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248365081] [2019-10-14 23:14:39,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-14 23:14:39,841 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:39,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-14 23:14:39,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 23:14:39,842 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 35 states. [2019-10-14 23:14:40,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:40,185 INFO L93 Difference]: Finished difference Result 257 states and 260 transitions. [2019-10-14 23:14:40,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 23:14:40,185 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 154 [2019-10-14 23:14:40,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:40,186 INFO L225 Difference]: With dead ends: 257 [2019-10-14 23:14:40,186 INFO L226 Difference]: Without dead ends: 162 [2019-10-14 23:14:40,187 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=512, Invalid=820, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 23:14:40,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-10-14 23:14:40,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2019-10-14 23:14:40,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-10-14 23:14:40,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2019-10-14 23:14:40,192 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 154 [2019-10-14 23:14:40,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:40,192 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2019-10-14 23:14:40,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-14 23:14:40,193 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2019-10-14 23:14:40,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-14 23:14:40,193 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:40,194 INFO L380 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:40,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:40,398 INFO L410 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:40,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:40,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1822864519, now seen corresponding path program 29 times [2019-10-14 23:14:40,398 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:40,399 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593050626] [2019-10-14 23:14:40,399 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:40,399 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:40,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:40,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-10-14 23:14:40,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593050626] [2019-10-14 23:14:40,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656255234] [2019-10-14 23:14:40,887 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:41,431 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-10-14 23:14:41,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:41,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-14 23:14:41,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2019-10-14 23:14:41,471 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:41,471 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 32] total 36 [2019-10-14 23:14:41,471 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882624058] [2019-10-14 23:14:41,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 23:14:41,472 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:41,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 23:14:41,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 23:14:41,473 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand 36 states. [2019-10-14 23:14:41,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:41,806 INFO L93 Difference]: Finished difference Result 265 states and 268 transitions. [2019-10-14 23:14:41,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-14 23:14:41,807 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 159 [2019-10-14 23:14:41,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:41,808 INFO L225 Difference]: With dead ends: 265 [2019-10-14 23:14:41,809 INFO L226 Difference]: Without dead ends: 167 [2019-10-14 23:14:41,810 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=544, Invalid=862, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 23:14:41,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-10-14 23:14:41,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2019-10-14 23:14:41,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-10-14 23:14:41,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2019-10-14 23:14:41,816 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 159 [2019-10-14 23:14:41,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:41,816 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2019-10-14 23:14:41,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 23:14:41,817 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2019-10-14 23:14:41,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-14 23:14:41,818 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:41,818 INFO L380 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:42,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:42,019 INFO L410 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:42,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:42,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1137541234, now seen corresponding path program 30 times [2019-10-14 23:14:42,020 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:42,020 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451024575] [2019-10-14 23:14:42,020 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:42,020 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:42,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2019-10-14 23:14:42,527 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451024575] [2019-10-14 23:14:42,527 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171202072] [2019-10-14 23:14:42,528 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true