/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_strcpy_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:47:02,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:47:02,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:47:02,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:47:02,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:47:02,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:47:02,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:47:02,722 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:47:02,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:47:02,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:47:02,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:47:02,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:47:02,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:47:02,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:47:02,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:47:02,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:47:02,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:47:02,735 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:47:02,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:47:02,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:47:02,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:47:02,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:47:02,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:47:02,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:47:02,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:47:02,754 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:47:02,754 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:47:02,756 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:47:02,757 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:47:02,759 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:47:02,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:47:02,760 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:47:02,760 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:47:02,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:47:02,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:47:02,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:47:02,763 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:47:02,783 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:47:02,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:47:02,785 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:47:02,785 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:47:02,785 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:47:02,786 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:47:02,786 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:47:02,786 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:47:02,786 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:47:02,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:47:02,787 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:47:02,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:47:02,788 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:47:02,788 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:47:02,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:47:02,789 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:47:02,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:47:02,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:47:02,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:47:02,790 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:47:02,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:47:02,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:47:02,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:47:02,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:47:02,791 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:47:02,791 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:47:02,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:47:02,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:47:02,791 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:47:03,062 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:47:03,083 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:47:03,087 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:47:03,088 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:47:03,089 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:47:03,089 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_strcpy_ground-1.i [2019-11-06 18:47:03,161 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90f471157/80ed5e1f1bf44b4887d5a6bed4fa9888/FLAGbc8024ac5 [2019-11-06 18:47:03,614 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:47:03,615 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_strcpy_ground-1.i [2019-11-06 18:47:03,621 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90f471157/80ed5e1f1bf44b4887d5a6bed4fa9888/FLAGbc8024ac5 [2019-11-06 18:47:03,988 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90f471157/80ed5e1f1bf44b4887d5a6bed4fa9888 [2019-11-06 18:47:03,998 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:47:03,999 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:47:04,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:47:04,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:47:04,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:47:04,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:47:03" (1/1) ... [2019-11-06 18:47:04,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@422cf923 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:04, skipping insertion in model container [2019-11-06 18:47:04,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:47:03" (1/1) ... [2019-11-06 18:47:04,016 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:47:04,034 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:47:04,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:47:04,234 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:47:04,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:47:04,271 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:47:04,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:04 WrapperNode [2019-11-06 18:47:04,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:47:04,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:47:04,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:47:04,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:47:04,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:04" (1/1) ... [2019-11-06 18:47:04,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:04" (1/1) ... [2019-11-06 18:47:04,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:04" (1/1) ... [2019-11-06 18:47:04,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:04" (1/1) ... [2019-11-06 18:47:04,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:04" (1/1) ... [2019-11-06 18:47:04,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:04" (1/1) ... [2019-11-06 18:47:04,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:04" (1/1) ... [2019-11-06 18:47:04,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:47:04,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:47:04,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:47:04,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:47:04,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:47:04,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:47:04,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:47:04,450 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:47:04,450 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:47:04,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:47:04,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:47:04,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:47:04,451 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:47:04,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:47:04,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:47:04,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:47:04,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:47:04,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:47:04,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:47:04,738 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:47:04,738 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 18:47:04,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:47:04 BoogieIcfgContainer [2019-11-06 18:47:04,739 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:47:04,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:47:04,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:47:04,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:47:04,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:47:03" (1/3) ... [2019-11-06 18:47:04,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@256aa1e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:47:04, skipping insertion in model container [2019-11-06 18:47:04,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:04" (2/3) ... [2019-11-06 18:47:04,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@256aa1e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:47:04, skipping insertion in model container [2019-11-06 18:47:04,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:47:04" (3/3) ... [2019-11-06 18:47:04,753 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_strcpy_ground-1.i [2019-11-06 18:47:04,762 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:47:04,769 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:47:04,780 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:47:04,805 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:47:04,805 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:47:04,805 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:47:04,805 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:47:04,805 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:47:04,805 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:47:04,806 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:47:04,806 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:47:04,822 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-06 18:47:04,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-06 18:47:04,827 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:04,828 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:04,830 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:04,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:04,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1224509072, now seen corresponding path program 1 times [2019-11-06 18:47:04,841 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:04,842 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679469210] [2019-11-06 18:47:04,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:04,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:05,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:47:05,004 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679469210] [2019-11-06 18:47:05,005 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:47:05,006 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:47:05,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143273216] [2019-11-06 18:47:05,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:47:05,012 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:05,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:47:05,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:47:05,029 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2019-11-06 18:47:05,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:05,144 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2019-11-06 18:47:05,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:47:05,146 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-06 18:47:05,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:05,155 INFO L225 Difference]: With dead ends: 45 [2019-11-06 18:47:05,155 INFO L226 Difference]: Without dead ends: 21 [2019-11-06 18:47:05,158 INFO L630 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 [2019-11-06 18:47:05,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-06 18:47:05,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-06 18:47:05,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-06 18:47:05,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-06 18:47:05,194 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2019-11-06 18:47:05,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:05,194 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-06 18:47:05,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:47:05,195 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-06 18:47:05,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:47:05,196 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:05,196 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:05,197 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:05,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:05,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1351700691, now seen corresponding path program 1 times [2019-11-06 18:47:05,198 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:05,198 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619919460] [2019-11-06 18:47:05,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:47:05,291 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619919460] [2019-11-06 18:47:05,291 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:47:05,292 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:47:05,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235649396] [2019-11-06 18:47:05,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:47:05,294 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:05,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:47:05,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:47:05,295 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 4 states. [2019-11-06 18:47:05,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:05,391 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2019-11-06 18:47:05,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:47:05,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-06 18:47:05,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:05,393 INFO L225 Difference]: With dead ends: 36 [2019-11-06 18:47:05,394 INFO L226 Difference]: Without dead ends: 22 [2019-11-06 18:47:05,396 INFO L630 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 [2019-11-06 18:47:05,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-06 18:47:05,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-06 18:47:05,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-06 18:47:05,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-06 18:47:05,408 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 16 [2019-11-06 18:47:05,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:05,409 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-06 18:47:05,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:47:05,409 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-06 18:47:05,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:47:05,410 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:05,410 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:05,411 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:05,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:05,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1495374293, now seen corresponding path program 1 times [2019-11-06 18:47:05,413 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:05,413 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359104766] [2019-11-06 18:47:05,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:05,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:47:05,526 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359104766] [2019-11-06 18:47:05,526 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:47:05,526 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 18:47:05,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014458330] [2019-11-06 18:47:05,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:47:05,527 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:05,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:47:05,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:47:05,528 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2019-11-06 18:47:05,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:05,607 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2019-11-06 18:47:05,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:47:05,607 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-11-06 18:47:05,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:05,608 INFO L225 Difference]: With dead ends: 37 [2019-11-06 18:47:05,608 INFO L226 Difference]: Without dead ends: 25 [2019-11-06 18:47:05,609 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:47:05,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-06 18:47:05,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-06 18:47:05,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-06 18:47:05,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-11-06 18:47:05,615 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2019-11-06 18:47:05,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:05,615 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-11-06 18:47:05,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:47:05,615 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-11-06 18:47:05,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:47:05,616 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:05,616 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:05,617 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:05,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:05,617 INFO L82 PathProgramCache]: Analyzing trace with hash 967402426, now seen corresponding path program 1 times [2019-11-06 18:47:05,617 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:05,618 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688572222] [2019-11-06 18:47:05,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 18:47:05,681 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688572222] [2019-11-06 18:47:05,681 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695000878] [2019-11-06 18:47:05,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:05,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:47:05,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:05,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 18:47:05,807 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:05,807 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:47:05,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519978920] [2019-11-06 18:47:05,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:47:05,812 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:05,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:47:05,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:47:05,814 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2019-11-06 18:47:05,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:05,883 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-11-06 18:47:05,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:47:05,883 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-11-06 18:47:05,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:05,884 INFO L225 Difference]: With dead ends: 43 [2019-11-06 18:47:05,885 INFO L226 Difference]: Without dead ends: 26 [2019-11-06 18:47:05,885 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:47:05,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-06 18:47:05,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-06 18:47:05,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 18:47:05,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-06 18:47:05,897 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2019-11-06 18:47:05,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:05,900 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-06 18:47:05,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:47:05,900 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-06 18:47:05,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 18:47:05,901 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:05,901 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:06,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:06,108 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:06,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:06,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1525237150, now seen corresponding path program 2 times [2019-11-06 18:47:06,120 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:06,121 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289590663] [2019-11-06 18:47:06,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:06,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 18:47:06,205 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289590663] [2019-11-06 18:47:06,205 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451454218] [2019-11-06 18:47:06,205 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 [2019-11-06 18:47:06,249 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:47:06,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:06,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:47:06,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:06,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 18:47:06,264 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:06,264 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:47:06,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973650607] [2019-11-06 18:47:06,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:47:06,265 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:06,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:47:06,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:47:06,266 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 7 states. [2019-11-06 18:47:06,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:06,333 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-11-06 18:47:06,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:47:06,334 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-11-06 18:47:06,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:06,335 INFO L225 Difference]: With dead ends: 44 [2019-11-06 18:47:06,335 INFO L226 Difference]: Without dead ends: 27 [2019-11-06 18:47:06,338 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:47:06,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-06 18:47:06,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-06 18:47:06,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 18:47:06,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-06 18:47:06,349 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2019-11-06 18:47:06,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:06,349 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-06 18:47:06,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:47:06,350 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-06 18:47:06,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-06 18:47:06,350 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:06,350 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:06,551 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:06,552 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:06,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:06,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1487652678, now seen corresponding path program 3 times [2019-11-06 18:47:06,553 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:06,553 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274184457] [2019-11-06 18:47:06,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:06,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:06,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 18:47:06,629 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274184457] [2019-11-06 18:47:06,629 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685049014] [2019-11-06 18:47:06,629 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 [2019-11-06 18:47:06,679 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 18:47:06,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:06,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 18:47:06,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:06,732 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-06 18:47:06,733 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:47:06,747 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:47:06,748 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:47:06,749 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-06 18:47:06,785 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2019-11-06 18:47:06,786 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:47:06,795 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:47:06,796 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:47:06,796 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2019-11-06 18:47:06,854 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2019-11-06 18:47:06,855 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:47:06,859 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:47:06,860 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:47:06,860 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2019-11-06 18:47:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 18:47:06,902 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:06,902 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2019-11-06 18:47:06,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252785221] [2019-11-06 18:47:06,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:47:06,903 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:06,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:47:06,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:47:06,904 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 13 states. [2019-11-06 18:47:07,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:07,230 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2019-11-06 18:47:07,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:47:07,232 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2019-11-06 18:47:07,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:07,233 INFO L225 Difference]: With dead ends: 53 [2019-11-06 18:47:07,233 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 18:47:07,235 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:47:07,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 18:47:07,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-06 18:47:07,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 18:47:07,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-06 18:47:07,247 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 22 [2019-11-06 18:47:07,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:07,251 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-06 18:47:07,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:47:07,251 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-06 18:47:07,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 18:47:07,252 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:07,252 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:07,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:07,456 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:07,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:07,456 INFO L82 PathProgramCache]: Analyzing trace with hash -19978727, now seen corresponding path program 1 times [2019-11-06 18:47:07,456 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:07,457 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292888872] [2019-11-06 18:47:07,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:07,545 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:47:07,546 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292888872] [2019-11-06 18:47:07,546 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460602531] [2019-11-06 18:47:07,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:07,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:47:07,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:07,623 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:47:07,624 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:07,624 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:47:07,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175352372] [2019-11-06 18:47:07,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:47:07,625 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:07,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:47:07,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:47:07,626 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 9 states. [2019-11-06 18:47:07,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:07,704 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-11-06 18:47:07,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:47:07,705 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2019-11-06 18:47:07,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:07,710 INFO L225 Difference]: With dead ends: 58 [2019-11-06 18:47:07,711 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 18:47:07,715 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:47:07,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 18:47:07,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-06 18:47:07,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 18:47:07,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-11-06 18:47:07,727 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 31 [2019-11-06 18:47:07,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:07,730 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-11-06 18:47:07,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:47:07,730 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-11-06 18:47:07,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:47:07,731 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:07,731 INFO L410 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:07,944 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:07,944 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:07,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:07,945 INFO L82 PathProgramCache]: Analyzing trace with hash -681273743, now seen corresponding path program 2 times [2019-11-06 18:47:07,945 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:07,946 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830150476] [2019-11-06 18:47:07,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:07,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:47:08,053 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830150476] [2019-11-06 18:47:08,053 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17583121] [2019-11-06 18:47:08,053 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:08,096 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:47:08,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:08,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:47:08,100 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:47:08,121 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:08,121 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-06 18:47:08,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433886961] [2019-11-06 18:47:08,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:47:08,123 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:08,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:47:08,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:47:08,124 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 10 states. [2019-11-06 18:47:08,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:08,205 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2019-11-06 18:47:08,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:47:08,205 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2019-11-06 18:47:08,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:08,206 INFO L225 Difference]: With dead ends: 59 [2019-11-06 18:47:08,206 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 18:47:08,207 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:47:08,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 18:47:08,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-06 18:47:08,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-06 18:47:08,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-11-06 18:47:08,213 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 32 [2019-11-06 18:47:08,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:08,213 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-11-06 18:47:08,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:47:08,214 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-11-06 18:47:08,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-06 18:47:08,215 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:08,215 INFO L410 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:08,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:08,416 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:08,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:08,417 INFO L82 PathProgramCache]: Analyzing trace with hash 293417241, now seen corresponding path program 3 times [2019-11-06 18:47:08,418 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:08,418 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463307743] [2019-11-06 18:47:08,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:47:08,560 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463307743] [2019-11-06 18:47:08,560 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877141249] [2019-11-06 18:47:08,561 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:08,607 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 18:47:08,607 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:08,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:47:08,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:08,657 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-06 18:47:08,658 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:08,658 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-11-06 18:47:08,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206863857] [2019-11-06 18:47:08,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:47:08,659 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:08,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:47:08,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:47:08,659 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 14 states. [2019-11-06 18:47:08,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:08,842 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2019-11-06 18:47:08,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:47:08,842 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2019-11-06 18:47:08,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:08,844 INFO L225 Difference]: With dead ends: 69 [2019-11-06 18:47:08,844 INFO L226 Difference]: Without dead ends: 40 [2019-11-06 18:47:08,845 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:47:08,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-06 18:47:08,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-06 18:47:08,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 18:47:08,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2019-11-06 18:47:08,862 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 33 [2019-11-06 18:47:08,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:08,863 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2019-11-06 18:47:08,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:47:08,867 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2019-11-06 18:47:08,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 18:47:08,868 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:08,868 INFO L410 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:09,071 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:09,072 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:09,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:09,073 INFO L82 PathProgramCache]: Analyzing trace with hash 604607084, now seen corresponding path program 4 times [2019-11-06 18:47:09,073 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:09,074 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950115105] [2019-11-06 18:47:09,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-06 18:47:09,192 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950115105] [2019-11-06 18:47:09,192 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993492137] [2019-11-06 18:47:09,192 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:09,250 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:47:09,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:09,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:47:09,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:47:09,274 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:09,274 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:47:09,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457977562] [2019-11-06 18:47:09,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:47:09,275 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:09,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:47:09,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:47:09,276 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 12 states. [2019-11-06 18:47:09,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:09,348 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2019-11-06 18:47:09,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:47:09,348 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2019-11-06 18:47:09,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:09,349 INFO L225 Difference]: With dead ends: 67 [2019-11-06 18:47:09,349 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 18:47:09,350 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:47:09,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 18:47:09,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-06 18:47:09,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 18:47:09,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2019-11-06 18:47:09,356 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 37 [2019-11-06 18:47:09,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:09,356 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2019-11-06 18:47:09,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:47:09,357 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2019-11-06 18:47:09,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 18:47:09,357 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:09,358 INFO L410 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:09,561 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:09,562 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:09,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:09,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1643077828, now seen corresponding path program 5 times [2019-11-06 18:47:09,563 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:09,564 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343106558] [2019-11-06 18:47:09,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-06 18:47:09,658 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343106558] [2019-11-06 18:47:09,658 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758691615] [2019-11-06 18:47:09,658 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:09,770 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-06 18:47:09,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:09,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:47:09,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:47:09,796 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:09,796 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:47:09,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503545363] [2019-11-06 18:47:09,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:47:09,797 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:09,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:47:09,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:47:09,797 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 13 states. [2019-11-06 18:47:09,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:09,881 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2019-11-06 18:47:09,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:47:09,882 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2019-11-06 18:47:09,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:09,883 INFO L225 Difference]: With dead ends: 68 [2019-11-06 18:47:09,883 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 18:47:09,884 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:47:09,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 18:47:09,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-11-06 18:47:09,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-06 18:47:09,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2019-11-06 18:47:09,899 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 38 [2019-11-06 18:47:09,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:09,900 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2019-11-06 18:47:09,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:47:09,900 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2019-11-06 18:47:09,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-06 18:47:09,901 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:09,901 INFO L410 BasicCegarLoop]: trace histogram [9, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:10,112 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:10,113 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:10,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:10,113 INFO L82 PathProgramCache]: Analyzing trace with hash -524067476, now seen corresponding path program 6 times [2019-11-06 18:47:10,113 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:10,114 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596268902] [2019-11-06 18:47:10,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:10,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-06 18:47:10,260 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596268902] [2019-11-06 18:47:10,261 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072164068] [2019-11-06 18:47:10,261 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:10,315 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-06 18:47:10,315 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:10,316 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-06 18:47:10,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:10,327 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-06 18:47:10,328 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:47:10,334 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:47:10,335 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:47:10,335 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-06 18:47:10,378 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2019-11-06 18:47:10,378 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:47:10,385 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:47:10,386 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:47:10,386 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2019-11-06 18:47:12,470 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#src~0.base_BEFORE_CALL_1| Int) (|v_main_~#dst~0.base_BEFORE_CALL_1| Int)) (and (not (= |v_main_~#src~0.base_BEFORE_CALL_1| |v_main_~#dst~0.base_BEFORE_CALL_1|)) (= (select (select |c_#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_1|) 4) (select (select |c_#memory_int| |v_main_~#src~0.base_BEFORE_CALL_1|) 4)))) is different from true [2019-11-06 18:47:12,548 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2019-11-06 18:47:12,549 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:47:12,555 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:47:12,555 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:47:12,556 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2019-11-06 18:47:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 45 trivial. 2 not checked. [2019-11-06 18:47:12,617 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:12,617 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2019-11-06 18:47:12,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507090691] [2019-11-06 18:47:12,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 18:47:12,618 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:12,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 18:47:12,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=335, Unknown=1, NotChecked=38, Total=462 [2019-11-06 18:47:12,619 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 22 states. [2019-11-06 18:47:17,020 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 23 [2019-11-06 18:47:21,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:21,250 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2019-11-06 18:47:21,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-06 18:47:21,251 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 39 [2019-11-06 18:47:21,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:21,252 INFO L225 Difference]: With dead ends: 79 [2019-11-06 18:47:21,252 INFO L226 Difference]: Without dead ends: 53 [2019-11-06 18:47:21,254 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=236, Invalid=954, Unknown=4, NotChecked=66, Total=1260 [2019-11-06 18:47:21,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-06 18:47:21,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2019-11-06 18:47:21,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 18:47:21,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2019-11-06 18:47:21,261 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 39 [2019-11-06 18:47:21,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:21,261 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2019-11-06 18:47:21,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-06 18:47:21,262 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2019-11-06 18:47:21,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-06 18:47:21,262 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:21,263 INFO L410 BasicCegarLoop]: trace histogram [10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:21,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:21,464 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:21,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:21,464 INFO L82 PathProgramCache]: Analyzing trace with hash -650505093, now seen corresponding path program 7 times [2019-11-06 18:47:21,465 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:21,465 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13398953] [2019-11-06 18:47:21,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:21,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:21,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:21,606 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-06 18:47:21,606 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13398953] [2019-11-06 18:47:21,606 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578436961] [2019-11-06 18:47:21,607 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:21,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:47:21,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:21,708 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-06 18:47:21,708 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:21,709 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-11-06 18:47:21,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108594001] [2019-11-06 18:47:21,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:47:21,709 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:21,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:47:21,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:47:21,710 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 15 states. [2019-11-06 18:47:21,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:21,793 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2019-11-06 18:47:21,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:47:21,794 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2019-11-06 18:47:21,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:21,794 INFO L225 Difference]: With dead ends: 86 [2019-11-06 18:47:21,795 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 18:47:21,795 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:47:21,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 18:47:21,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-06 18:47:21,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-06 18:47:21,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2019-11-06 18:47:21,802 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 48 [2019-11-06 18:47:21,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:21,803 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2019-11-06 18:47:21,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:47:21,803 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2019-11-06 18:47:21,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-06 18:47:21,804 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:21,804 INFO L410 BasicCegarLoop]: trace histogram [11, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:22,014 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:22,014 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:22,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:22,015 INFO L82 PathProgramCache]: Analyzing trace with hash 39345955, now seen corresponding path program 8 times [2019-11-06 18:47:22,015 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:22,016 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612946006] [2019-11-06 18:47:22,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:22,159 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-06 18:47:22,159 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612946006] [2019-11-06 18:47:22,159 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183442987] [2019-11-06 18:47:22,159 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:22,209 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:47:22,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:22,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 18:47:22,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-06 18:47:22,235 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:22,235 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-11-06 18:47:22,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027209954] [2019-11-06 18:47:22,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:47:22,236 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:22,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:47:22,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:47:22,237 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 16 states. [2019-11-06 18:47:22,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:22,334 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2019-11-06 18:47:22,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:47:22,335 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2019-11-06 18:47:22,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:22,335 INFO L225 Difference]: With dead ends: 87 [2019-11-06 18:47:22,336 INFO L226 Difference]: Without dead ends: 53 [2019-11-06 18:47:22,336 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:47:22,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-06 18:47:22,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-06 18:47:22,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 18:47:22,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2019-11-06 18:47:22,344 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 49 [2019-11-06 18:47:22,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:22,344 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2019-11-06 18:47:22,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:47:22,344 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2019-11-06 18:47:22,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 18:47:22,345 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:22,345 INFO L410 BasicCegarLoop]: trace histogram [12, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:22,546 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:22,546 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:22,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:22,547 INFO L82 PathProgramCache]: Analyzing trace with hash -50108037, now seen corresponding path program 9 times [2019-11-06 18:47:22,547 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:22,547 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404754387] [2019-11-06 18:47:22,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:22,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:22,718 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 4 proven. 78 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-06 18:47:22,718 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404754387] [2019-11-06 18:47:22,718 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383600289] [2019-11-06 18:47:22,718 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:22,793 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:47:22,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:22,795 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:47:22,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-11-06 18:47:22,929 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:22,929 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2019-11-06 18:47:22,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260444372] [2019-11-06 18:47:22,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 18:47:22,931 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:22,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 18:47:22,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:47:22,933 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 22 states. [2019-11-06 18:47:23,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:23,358 INFO L93 Difference]: Finished difference Result 101 states and 115 transitions. [2019-11-06 18:47:23,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-06 18:47:23,358 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2019-11-06 18:47:23,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:23,359 INFO L225 Difference]: With dead ends: 101 [2019-11-06 18:47:23,359 INFO L226 Difference]: Without dead ends: 57 [2019-11-06 18:47:23,361 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=828, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:47:23,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-06 18:47:23,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-11-06 18:47:23,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 18:47:23,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2019-11-06 18:47:23,370 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 50 [2019-11-06 18:47:23,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:23,370 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2019-11-06 18:47:23,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-06 18:47:23,370 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2019-11-06 18:47:23,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-06 18:47:23,371 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:23,371 INFO L410 BasicCegarLoop]: trace histogram [13, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:23,575 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:23,575 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:23,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:23,576 INFO L82 PathProgramCache]: Analyzing trace with hash -2059303352, now seen corresponding path program 10 times [2019-11-06 18:47:23,576 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:23,577 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793626452] [2019-11-06 18:47:23,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 4 proven. 91 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-06 18:47:23,761 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793626452] [2019-11-06 18:47:23,761 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391055036] [2019-11-06 18:47:23,761 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:23,822 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:47:23,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:23,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 18:47:23,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 18:47:23,854 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:23,854 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-06 18:47:23,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92241044] [2019-11-06 18:47:23,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:47:23,855 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:23,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:47:23,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:47:23,855 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 18 states. [2019-11-06 18:47:23,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:23,967 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2019-11-06 18:47:23,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:47:23,967 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 54 [2019-11-06 18:47:23,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:23,968 INFO L225 Difference]: With dead ends: 95 [2019-11-06 18:47:23,968 INFO L226 Difference]: Without dead ends: 58 [2019-11-06 18:47:23,969 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:47:23,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-06 18:47:23,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-06 18:47:23,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-06 18:47:23,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2019-11-06 18:47:23,977 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 54 [2019-11-06 18:47:23,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:23,977 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2019-11-06 18:47:23,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:47:23,977 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2019-11-06 18:47:23,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-06 18:47:23,978 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:23,978 INFO L410 BasicCegarLoop]: trace histogram [14, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:24,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:24,179 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:24,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:24,180 INFO L82 PathProgramCache]: Analyzing trace with hash 605500144, now seen corresponding path program 11 times [2019-11-06 18:47:24,180 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:24,181 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175478023] [2019-11-06 18:47:24,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:24,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:24,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 4 proven. 105 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-06 18:47:24,368 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175478023] [2019-11-06 18:47:24,368 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678075522] [2019-11-06 18:47:24,368 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:24,705 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-11-06 18:47:24,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:24,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 18:47:24,710 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:24,730 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 18:47:24,731 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:24,731 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-06 18:47:24,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827935094] [2019-11-06 18:47:24,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:47:24,732 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:24,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:47:24,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:47:24,732 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 19 states. [2019-11-06 18:47:24,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:24,843 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2019-11-06 18:47:24,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:47:24,844 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2019-11-06 18:47:24,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:24,845 INFO L225 Difference]: With dead ends: 96 [2019-11-06 18:47:24,845 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 18:47:24,846 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:47:24,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 18:47:24,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-11-06 18:47:24,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-06 18:47:24,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2019-11-06 18:47:24,853 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 55 [2019-11-06 18:47:24,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:24,853 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2019-11-06 18:47:24,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:47:24,854 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2019-11-06 18:47:24,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 18:47:24,854 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:24,854 INFO L410 BasicCegarLoop]: trace histogram [15, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:25,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:25,059 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:25,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:25,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1610029896, now seen corresponding path program 12 times [2019-11-06 18:47:25,060 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:25,060 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408819589] [2019-11-06 18:47:25,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:25,296 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 4 proven. 120 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-06 18:47:25,297 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408819589] [2019-11-06 18:47:25,297 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471006713] [2019-11-06 18:47:25,297 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:25,451 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 18:47:25,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:25,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-06 18:47:25,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:25,462 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-06 18:47:25,463 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:47:25,471 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:47:25,471 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:47:25,471 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-06 18:47:25,534 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2019-11-06 18:47:25,535 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:47:25,548 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:47:25,549 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 18:47:25,550 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2019-11-06 18:47:27,632 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~i~0_16 Int) (|v_main_~#dst~0.base_BEFORE_CALL_2| Int) (|v_main_~#src~0.base_BEFORE_CALL_2| Int)) (and (let ((.cse0 (* v_main_~i~0_16 4))) (= (select (select |c_#memory_int| |v_main_~#src~0.base_BEFORE_CALL_2|) .cse0) (select (select |c_#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_2|) .cse0))) (not (= |v_main_~#src~0.base_BEFORE_CALL_2| |v_main_~#dst~0.base_BEFORE_CALL_2|)) (<= v_main_~i~0_16 2))) is different from true [2019-11-06 18:47:29,736 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~i~0_16 Int) (|v_main_~#dst~0.base_BEFORE_CALL_3| Int) (|v_main_~#src~0.base_BEFORE_CALL_3| Int)) (and (let ((.cse0 (* v_main_~i~0_16 4))) (= (select (select |c_#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_3|) .cse0) (select (select |c_#memory_int| |v_main_~#src~0.base_BEFORE_CALL_3|) .cse0))) (<= v_main_~i~0_16 2) (not (= |v_main_~#src~0.base_BEFORE_CALL_3| |v_main_~#dst~0.base_BEFORE_CALL_3|)))) is different from true [2019-11-06 18:47:31,765 WARN L191 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 21 [2019-11-06 18:47:33,808 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 22 [2019-11-06 18:47:33,942 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:47:33,944 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2019-11-06 18:47:33,944 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:47:33,953 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:47:33,954 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:47:33,954 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:47, output treesize:3 [2019-11-06 18:47:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 120 trivial. 7 not checked. [2019-11-06 18:47:36,039 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:36,039 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2019-11-06 18:47:36,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830021638] [2019-11-06 18:47:36,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-06 18:47:36,040 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:36,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-06 18:47:36,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=745, Unknown=3, NotChecked=118, Total=1056 [2019-11-06 18:47:36,041 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 33 states. [2019-11-06 18:47:40,931 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 27 [2019-11-06 18:47:45,023 WARN L191 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2019-11-06 18:47:49,105 WARN L191 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 44 DAG size of output: 33