/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/recursive/EvenOdd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:58:11,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:58:11,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:58:11,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 06:58:11,729 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 06:58:11,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 06:58:11,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 06:58:11,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 06:58:11,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 06:58:11,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 06:58:11,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 06:58:11,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 06:58:11,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:58:11,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:58:11,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:58:11,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:58:11,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:58:11,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:58:11,802 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:58:11,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:58:11,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:58:11,813 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:58:11,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:58:11,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:58:11,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:58:11,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:58:11,843 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:58:11,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:58:11,847 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:58:11,901 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:58:11,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:58:11,905 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:58:11,906 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:58:11,906 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:58:11,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:58:11,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:58:11,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:58:11,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:58:11,907 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:58:11,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:58:11,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:58:11,909 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:58:11,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:58:11,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:58:11,909 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:58:11,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:58:11,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:58:11,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:58:11,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:58:11,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:58:11,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:58:11,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:58:11,911 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:58:11,911 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:58:11,912 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:58:12,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:58:12,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:58:12,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:58:12,398 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:58:12,399 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:58:12,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/EvenOdd01-1.c [2020-12-22 06:58:12,483 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fce103f7/5ccd7d690d2549f6812aea635935c394/FLAG125dc1128 [2020-12-22 06:58:13,162 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:58:13,163 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/EvenOdd01-1.c [2020-12-22 06:58:13,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fce103f7/5ccd7d690d2549f6812aea635935c394/FLAG125dc1128 [2020-12-22 06:58:13,518 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fce103f7/5ccd7d690d2549f6812aea635935c394 [2020-12-22 06:58:13,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:58:13,523 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:58:13,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:58:13,529 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:58:13,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:58:13,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:58:13" (1/1) ... [2020-12-22 06:58:13,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53dd90f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:13, skipping insertion in model container [2020-12-22 06:58:13,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:58:13" (1/1) ... [2020-12-22 06:58:13,548 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:58:13,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:58:13,804 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/EvenOdd01-1.c[975,988] [2020-12-22 06:58:13,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:58:13,827 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:58:13,846 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/EvenOdd01-1.c[975,988] [2020-12-22 06:58:13,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:58:13,864 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:58:13,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:13 WrapperNode [2020-12-22 06:58:13,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:58:13,866 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:58:13,866 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:58:13,867 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:58:13,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:13" (1/1) ... [2020-12-22 06:58:13,884 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:13" (1/1) ... [2020-12-22 06:58:13,905 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:58:13,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:58:13,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:58:13,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:58:13,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:13" (1/1) ... [2020-12-22 06:58:13,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:13" (1/1) ... [2020-12-22 06:58:13,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:13" (1/1) ... [2020-12-22 06:58:13,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:13" (1/1) ... [2020-12-22 06:58:13,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:13" (1/1) ... [2020-12-22 06:58:13,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:13" (1/1) ... [2020-12-22 06:58:13,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:13" (1/1) ... [2020-12-22 06:58:13,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:58:13,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:58:13,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:58:13,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:58:13,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:13" (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 [2020-12-22 06:58:14,047 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2020-12-22 06:58:14,048 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2020-12-22 06:58:14,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:58:14,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:58:14,048 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2020-12-22 06:58:14,049 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2020-12-22 06:58:14,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:58:14,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:58:14,379 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:58:14,380 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 06:58:14,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:58:14 BoogieIcfgContainer [2020-12-22 06:58:14,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:58:14,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:58:14,384 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:58:14,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:58:14,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:58:13" (1/3) ... [2020-12-22 06:58:14,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa10375 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:58:14, skipping insertion in model container [2020-12-22 06:58:14,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:13" (2/3) ... [2020-12-22 06:58:14,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa10375 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:58:14, skipping insertion in model container [2020-12-22 06:58:14,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:58:14" (3/3) ... [2020-12-22 06:58:14,392 INFO L111 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2020-12-22 06:58:14,407 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:58:14,415 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 06:58:14,442 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 06:58:14,515 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:58:14,515 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:58:14,515 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:58:14,515 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:58:14,515 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:58:14,515 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:58:14,516 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:58:14,516 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:58:14,541 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-12-22 06:58:14,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 06:58:14,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:14,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:14,548 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:14,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:14,554 INFO L82 PathProgramCache]: Analyzing trace with hash 951696528, now seen corresponding path program 1 times [2020-12-22 06:58:14,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:14,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789667153] [2020-12-22 06:58:14,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:15,117 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 11 [2020-12-22 06:58:15,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:15,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:58:15,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789667153] [2020-12-22 06:58:15,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:58:15,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:58:15,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361919244] [2020-12-22 06:58:15,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:58:15,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:15,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:58:15,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:58:15,199 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 7 states. [2020-12-22 06:58:15,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:15,316 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-12-22 06:58:15,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:58:15,318 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-12-22 06:58:15,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:15,328 INFO L225 Difference]: With dead ends: 40 [2020-12-22 06:58:15,328 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 06:58:15,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:58:15,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 06:58:15,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-22 06:58:15,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 06:58:15,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-22 06:58:15,383 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 11 [2020-12-22 06:58:15,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:15,383 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-22 06:58:15,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:58:15,384 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-22 06:58:15,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 06:58:15,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:15,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:15,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:58:15,386 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:15,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:15,387 INFO L82 PathProgramCache]: Analyzing trace with hash 186374926, now seen corresponding path program 1 times [2020-12-22 06:58:15,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:15,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364706167] [2020-12-22 06:58:15,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:15,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:15,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:15,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:58:15,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364706167] [2020-12-22 06:58:15,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:58:15,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:58:15,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271756692] [2020-12-22 06:58:15,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:58:15,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:15,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:58:15,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:58:15,669 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 7 states. [2020-12-22 06:58:15,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:15,753 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-12-22 06:58:15,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 06:58:15,753 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-22 06:58:15,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:15,755 INFO L225 Difference]: With dead ends: 30 [2020-12-22 06:58:15,755 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 06:58:15,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:58:15,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 06:58:15,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-12-22 06:58:15,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 06:58:15,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-22 06:58:15,764 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2020-12-22 06:58:15,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:15,764 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-22 06:58:15,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:58:15,764 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-22 06:58:15,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 06:58:15,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:15,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:15,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:58:15,766 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:15,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:15,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1539294770, now seen corresponding path program 1 times [2020-12-22 06:58:15,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:15,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894810186] [2020-12-22 06:58:15,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:15,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:15,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:58:15,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894810186] [2020-12-22 06:58:15,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:58:15,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:58:15,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221991191] [2020-12-22 06:58:15,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:58:15,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:15,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:58:15,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:58:15,854 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 5 states. [2020-12-22 06:58:15,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:15,903 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-12-22 06:58:15,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:58:15,904 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-22 06:58:15,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:15,905 INFO L225 Difference]: With dead ends: 38 [2020-12-22 06:58:15,905 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 06:58:15,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:58:15,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 06:58:15,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-12-22 06:58:15,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 06:58:15,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-12-22 06:58:15,913 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 18 [2020-12-22 06:58:15,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:15,913 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-12-22 06:58:15,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:58:15,914 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-12-22 06:58:15,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 06:58:15,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:15,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:15,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:58:15,915 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:15,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:15,916 INFO L82 PathProgramCache]: Analyzing trace with hash -542404186, now seen corresponding path program 1 times [2020-12-22 06:58:15,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:15,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702876501] [2020-12-22 06:58:15,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:16,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:16,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:16,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:58:16,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702876501] [2020-12-22 06:58:16,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:58:16,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 06:58:16,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377401961] [2020-12-22 06:58:16,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 06:58:16,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:16,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 06:58:16,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 06:58:16,131 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 10 states. [2020-12-22 06:58:16,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:16,315 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-12-22 06:58:16,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 06:58:16,315 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-12-22 06:58:16,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:16,320 INFO L225 Difference]: With dead ends: 33 [2020-12-22 06:58:16,321 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 06:58:16,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-12-22 06:58:16,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 06:58:16,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-12-22 06:58:16,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 06:58:16,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-12-22 06:58:16,341 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2020-12-22 06:58:16,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:16,342 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-12-22 06:58:16,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 06:58:16,342 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-12-22 06:58:16,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 06:58:16,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:16,344 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:16,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 06:58:16,346 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:16,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:16,352 INFO L82 PathProgramCache]: Analyzing trace with hash 928601386, now seen corresponding path program 1 times [2020-12-22 06:58:16,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:16,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465308244] [2020-12-22 06:58:16,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:16,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:16,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:16,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 06:58:16,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465308244] [2020-12-22 06:58:16,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:58:16,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:58:16,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657819935] [2020-12-22 06:58:16,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:58:16,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:16,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:58:16,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:58:16,463 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-12-22 06:58:16,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:16,504 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-12-22 06:58:16,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:58:16,504 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-12-22 06:58:16,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:16,505 INFO L225 Difference]: With dead ends: 39 [2020-12-22 06:58:16,506 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 06:58:16,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:58:16,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 06:58:16,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-22 06:58:16,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 06:58:16,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-12-22 06:58:16,512 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 25 [2020-12-22 06:58:16,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:16,512 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-12-22 06:58:16,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:58:16,513 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-12-22 06:58:16,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 06:58:16,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:16,514 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:16,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 06:58:16,514 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:16,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:16,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1102972856, now seen corresponding path program 1 times [2020-12-22 06:58:16,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:16,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200297171] [2020-12-22 06:58:16,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:16,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:16,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:16,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:16,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 06:58:16,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200297171] [2020-12-22 06:58:16,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370619497] [2020-12-22 06:58:16,906 INFO L95 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 [2020-12-22 06:58:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:16,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 06:58:16,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:58:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 06:58:17,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:58:17,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2020-12-22 06:58:17,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387110287] [2020-12-22 06:58:17,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 06:58:17,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:17,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 06:58:17,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-12-22 06:58:17,246 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 15 states. [2020-12-22 06:58:17,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:17,485 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-12-22 06:58:17,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 06:58:17,485 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-12-22 06:58:17,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:17,487 INFO L225 Difference]: With dead ends: 39 [2020-12-22 06:58:17,487 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 06:58:17,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-12-22 06:58:17,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 06:58:17,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-12-22 06:58:17,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 06:58:17,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-22 06:58:17,494 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2020-12-22 06:58:17,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:17,494 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-22 06:58:17,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 06:58:17,494 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-22 06:58:17,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 06:58:17,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:17,496 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:17,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 06:58:17,710 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:17,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:17,711 INFO L82 PathProgramCache]: Analyzing trace with hash 550160832, now seen corresponding path program 1 times [2020-12-22 06:58:17,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:17,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077060666] [2020-12-22 06:58:17,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:17,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:17,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:17,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:17,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:17,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 06:58:18,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077060666] [2020-12-22 06:58:18,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016739294] [2020-12-22 06:58:18,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:58:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:18,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 06:58:18,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:58:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 06:58:18,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:58:18,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 16 [2020-12-22 06:58:18,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192097650] [2020-12-22 06:58:18,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 06:58:18,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:18,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 06:58:18,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-12-22 06:58:18,312 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 16 states. [2020-12-22 06:58:18,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:18,751 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-12-22 06:58:18,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 06:58:18,752 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-12-22 06:58:18,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:18,754 INFO L225 Difference]: With dead ends: 45 [2020-12-22 06:58:18,754 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 06:58:18,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-12-22 06:58:18,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 06:58:18,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-12-22 06:58:18,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 06:58:18,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-12-22 06:58:18,762 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 33 [2020-12-22 06:58:18,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:18,762 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-12-22 06:58:18,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 06:58:18,762 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-12-22 06:58:18,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 06:58:18,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:18,764 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:18,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:58:18,979 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:18,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:18,980 INFO L82 PathProgramCache]: Analyzing trace with hash 780373730, now seen corresponding path program 2 times [2020-12-22 06:58:18,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:18,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123194724] [2020-12-22 06:58:18,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:19,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:19,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:19,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:19,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:19,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:19,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:19,431 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 06:58:19,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123194724] [2020-12-22 06:58:19,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211363436] [2020-12-22 06:58:19,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:58:19,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 06:58:19,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 06:58:19,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 06:58:19,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:58:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 06:58:19,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:58:19,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2020-12-22 06:58:19,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022651597] [2020-12-22 06:58:19,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 06:58:19,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:19,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 06:58:19,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-12-22 06:58:19,723 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 19 states. [2020-12-22 06:58:20,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:20,125 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-12-22 06:58:20,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 06:58:20,130 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 40 [2020-12-22 06:58:20,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:20,132 INFO L225 Difference]: With dead ends: 51 [2020-12-22 06:58:20,132 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 06:58:20,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2020-12-22 06:58:20,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 06:58:20,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2020-12-22 06:58:20,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 06:58:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-12-22 06:58:20,145 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 40 [2020-12-22 06:58:20,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:20,145 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-12-22 06:58:20,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 06:58:20,146 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-12-22 06:58:20,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 06:58:20,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:20,151 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:20,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:58:20,353 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:20,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:20,354 INFO L82 PathProgramCache]: Analyzing trace with hash 866829402, now seen corresponding path program 2 times [2020-12-22 06:58:20,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:20,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59962415] [2020-12-22 06:58:20,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:20,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:20,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:20,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:20,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:20,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:20,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:20,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:20,795 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 06:58:20,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59962415] [2020-12-22 06:58:20,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311109742] [2020-12-22 06:58:20,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-12-22 06:58:20,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 06:58:20,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 06:58:20,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-22 06:58:20,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:58:21,048 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 06:58:21,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:58:21,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-12-22 06:58:21,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645909105] [2020-12-22 06:58:21,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 06:58:21,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:21,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 06:58:21,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-12-22 06:58:21,051 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 20 states. [2020-12-22 06:58:21,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:21,564 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-12-22 06:58:21,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 06:58:21,565 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-12-22 06:58:21,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:21,566 INFO L225 Difference]: With dead ends: 57 [2020-12-22 06:58:21,566 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 06:58:21,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-12-22 06:58:21,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 06:58:21,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2020-12-22 06:58:21,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 06:58:21,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-12-22 06:58:21,574 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 47 [2020-12-22 06:58:21,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:21,575 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-12-22 06:58:21,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 06:58:21,575 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-12-22 06:58:21,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 06:58:21,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:21,577 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:21,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:58:21,791 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:21,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:21,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1271721844, now seen corresponding path program 3 times [2020-12-22 06:58:21,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:21,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079507019] [2020-12-22 06:58:21,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:21,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:21,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:22,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-22 06:58:22,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079507019] [2020-12-22 06:58:22,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663486915] [2020-12-22 06:58:22,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:58:22,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 06:58:22,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 06:58:22,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-22 06:58:22,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:58:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-22 06:58:22,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:58:22,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 23 [2020-12-22 06:58:22,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836403472] [2020-12-22 06:58:22,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 06:58:22,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:22,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 06:58:22,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2020-12-22 06:58:22,685 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 23 states. [2020-12-22 06:58:23,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:23,331 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-12-22 06:58:23,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 06:58:23,332 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-12-22 06:58:23,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:23,333 INFO L225 Difference]: With dead ends: 63 [2020-12-22 06:58:23,334 INFO L226 Difference]: Without dead ends: 59 [2020-12-22 06:58:23,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 06:58:23,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-22 06:58:23,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-12-22 06:58:23,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 06:58:23,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-12-22 06:58:23,342 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 54 [2020-12-22 06:58:23,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:23,343 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-12-22 06:58:23,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 06:58:23,343 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-12-22 06:58:23,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 06:58:23,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:23,345 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:23,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 06:58:23,561 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:23,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:23,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1194008948, now seen corresponding path program 3 times [2020-12-22 06:58:23,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:23,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871974631] [2020-12-22 06:58:23,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:23,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:23,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:23,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:23,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:23,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:23,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:24,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:24,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:24,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 06:58:24,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871974631] [2020-12-22 06:58:24,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127090467] [2020-12-22 06:58:24,214 INFO L93 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 [2020-12-22 06:58:24,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 06:58:24,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 06:58:24,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-22 06:58:24,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:58:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 06:58:24,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:58:24,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-12-22 06:58:24,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316239413] [2020-12-22 06:58:24,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 06:58:24,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:24,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 06:58:24,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2020-12-22 06:58:24,520 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 24 states. [2020-12-22 06:58:25,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:25,356 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-12-22 06:58:25,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 06:58:25,357 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 61 [2020-12-22 06:58:25,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:25,359 INFO L225 Difference]: With dead ends: 69 [2020-12-22 06:58:25,359 INFO L226 Difference]: Without dead ends: 65 [2020-12-22 06:58:25,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 06:58:25,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-22 06:58:25,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2020-12-22 06:58:25,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 06:58:25,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-12-22 06:58:25,384 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 61 [2020-12-22 06:58:25,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:25,385 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-12-22 06:58:25,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 06:58:25,385 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-12-22 06:58:25,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 06:58:25,387 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:25,388 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:25,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:58:25,598 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:25,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:25,599 INFO L82 PathProgramCache]: Analyzing trace with hash 809184438, now seen corresponding path program 4 times [2020-12-22 06:58:25,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:25,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428205072] [2020-12-22 06:58:25,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:25,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:26,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:26,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:26,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:26,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-22 06:58:26,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428205072] [2020-12-22 06:58:26,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3638535] [2020-12-22 06:58:26,325 INFO L93 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 [2020-12-22 06:58:26,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 06:58:26,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 06:58:26,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-22 06:58:26,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:58:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-22 06:58:26,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:58:26,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 27 [2020-12-22 06:58:26,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284140631] [2020-12-22 06:58:26,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 06:58:26,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:26,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 06:58:26,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2020-12-22 06:58:26,664 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 27 states. [2020-12-22 06:58:27,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:27,561 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-12-22 06:58:27,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 06:58:27,562 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 68 [2020-12-22 06:58:27,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:27,563 INFO L225 Difference]: With dead ends: 75 [2020-12-22 06:58:27,564 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 06:58:27,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=132, Invalid=1848, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 06:58:27,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 06:58:27,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-12-22 06:58:27,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 06:58:27,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-12-22 06:58:27,572 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 68 [2020-12-22 06:58:27,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:27,573 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-12-22 06:58:27,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 06:58:27,573 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-12-22 06:58:27,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 06:58:27,574 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:27,574 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:27,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:58:27,788 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:27,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:27,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1512865522, now seen corresponding path program 4 times [2020-12-22 06:58:27,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:27,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689358857] [2020-12-22 06:58:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:27,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:27,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:28,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:28,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:28,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:28,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:28,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:28,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:28,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:28,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:28,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-12-22 06:58:28,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689358857] [2020-12-22 06:58:28,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345084363] [2020-12-22 06:58:28,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:58:28,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 06:58:28,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 06:58:28,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-22 06:58:28,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:58:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-12-22 06:58:28,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:58:28,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-12-22 06:58:28,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407183867] [2020-12-22 06:58:28,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 06:58:28,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:28,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 06:58:28,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2020-12-22 06:58:28,944 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 28 states. [2020-12-22 06:58:30,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:30,046 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-12-22 06:58:30,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 06:58:30,046 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 75 [2020-12-22 06:58:30,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:30,047 INFO L225 Difference]: With dead ends: 81 [2020-12-22 06:58:30,048 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 06:58:30,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 06:58:30,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 06:58:30,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2020-12-22 06:58:30,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 06:58:30,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-12-22 06:58:30,056 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 75 [2020-12-22 06:58:30,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:30,056 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-12-22 06:58:30,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 06:58:30,056 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-12-22 06:58:30,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 06:58:30,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:30,062 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:30,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 06:58:30,277 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:30,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:30,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1531804832, now seen corresponding path program 5 times [2020-12-22 06:58:30,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:30,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459392168] [2020-12-22 06:58:30,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:30,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:30,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:30,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:30,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:30,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:30,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:30,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:30,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:30,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:30,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:30,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:30,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:31,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:31,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:31,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-22 06:58:31,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459392168] [2020-12-22 06:58:31,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056300331] [2020-12-22 06:58:31,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:58:31,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 06:58:31,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 06:58:31,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 96 conjunts are in the unsatisfiable core [2020-12-22 06:58:31,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:58:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-22 06:58:31,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:58:31,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 31 [2020-12-22 06:58:31,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618602041] [2020-12-22 06:58:31,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 06:58:31,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:31,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 06:58:31,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=864, Unknown=0, NotChecked=0, Total=930 [2020-12-22 06:58:31,660 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 31 states. [2020-12-22 06:58:33,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:33,010 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2020-12-22 06:58:33,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 06:58:33,011 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 82 [2020-12-22 06:58:33,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:33,012 INFO L225 Difference]: With dead ends: 87 [2020-12-22 06:58:33,012 INFO L226 Difference]: Without dead ends: 83 [2020-12-22 06:58:33,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=156, Invalid=2600, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 06:58:33,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-22 06:58:33,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-12-22 06:58:33,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 06:58:33,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-12-22 06:58:33,021 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 82 [2020-12-22 06:58:33,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:33,021 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-12-22 06:58:33,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 06:58:33,022 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-12-22 06:58:33,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 06:58:33,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:33,023 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:33,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:58:33,238 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:33,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:33,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1881963736, now seen corresponding path program 5 times [2020-12-22 06:58:33,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:33,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628493703] [2020-12-22 06:58:33,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:33,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:33,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:33,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:33,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:33,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:33,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:33,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:33,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:33,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:33,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:34,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:34,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-12-22 06:58:34,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628493703] [2020-12-22 06:58:34,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127925397] [2020-12-22 06:58:34,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-12-22 06:58:34,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 06:58:34,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 06:58:34,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 104 conjunts are in the unsatisfiable core [2020-12-22 06:58:34,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:58:34,640 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-12-22 06:58:34,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:58:34,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 33 [2020-12-22 06:58:34,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244614248] [2020-12-22 06:58:34,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 06:58:34,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:34,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 06:58:34,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=987, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 06:58:34,643 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 33 states. [2020-12-22 06:58:36,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:36,244 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-12-22 06:58:36,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 06:58:36,245 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 89 [2020-12-22 06:58:36,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:36,246 INFO L225 Difference]: With dead ends: 93 [2020-12-22 06:58:36,246 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 06:58:36,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=167, Invalid=3025, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 06:58:36,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 06:58:36,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-12-22 06:58:36,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 06:58:36,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-12-22 06:58:36,255 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 89 [2020-12-22 06:58:36,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:36,255 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-12-22 06:58:36,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 06:58:36,255 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-12-22 06:58:36,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 06:58:36,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:36,257 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:36,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 06:58:36,471 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:36,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:36,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1649915018, now seen corresponding path program 6 times [2020-12-22 06:58:36,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:36,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258769447] [2020-12-22 06:58:36,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:36,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:36,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:36,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:36,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:36,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:36,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:36,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:37,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:37,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:37,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:37,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:37,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:37,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:37,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:37,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-12-22 06:58:37,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258769447] [2020-12-22 06:58:37,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354615614] [2020-12-22 06:58:37,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-12-22 06:58:37,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 06:58:37,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 06:58:37,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 112 conjunts are in the unsatisfiable core [2020-12-22 06:58:37,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:58:38,219 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-12-22 06:58:38,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:58:38,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 35 [2020-12-22 06:58:38,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103541266] [2020-12-22 06:58:38,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 06:58:38,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:38,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 06:58:38,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1116, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 06:58:38,221 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 35 states. [2020-12-22 06:58:40,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:40,026 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-12-22 06:58:40,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 06:58:40,026 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 96 [2020-12-22 06:58:40,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:40,028 INFO L225 Difference]: With dead ends: 99 [2020-12-22 06:58:40,028 INFO L226 Difference]: Without dead ends: 95 [2020-12-22 06:58:40,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=180, Invalid=3480, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 06:58:40,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-22 06:58:40,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 60. [2020-12-22 06:58:40,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 06:58:40,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-12-22 06:58:40,035 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 96 [2020-12-22 06:58:40,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:40,036 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-12-22 06:58:40,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 06:58:40,036 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-12-22 06:58:40,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-22 06:58:40,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:40,037 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:40,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 06:58:40,253 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:40,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:40,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1794979902, now seen corresponding path program 6 times [2020-12-22 06:58:40,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:40,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316828705] [2020-12-22 06:58:40,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:40,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:40,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:40,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:40,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:40,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:40,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:40,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:40,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:40,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:40,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:40,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:41,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:41,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:41,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:41,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:41,510 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-22 06:58:41,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316828705] [2020-12-22 06:58:41,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682149069] [2020-12-22 06:58:41,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:58:41,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 06:58:41,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 06:58:41,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 120 conjunts are in the unsatisfiable core [2020-12-22 06:58:41,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:58:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-22 06:58:41,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:58:41,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 36 [2020-12-22 06:58:42,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541632959] [2020-12-22 06:58:42,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 06:58:42,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:42,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 06:58:42,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1187, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 06:58:42,002 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 36 states. [2020-12-22 06:58:44,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:44,043 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2020-12-22 06:58:44,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 06:58:44,043 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 103 [2020-12-22 06:58:44,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:44,045 INFO L225 Difference]: With dead ends: 105 [2020-12-22 06:58:44,045 INFO L226 Difference]: Without dead ends: 101 [2020-12-22 06:58:44,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=186, Invalid=3846, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 06:58:44,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-22 06:58:44,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 63. [2020-12-22 06:58:44,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 06:58:44,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-12-22 06:58:44,053 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 103 [2020-12-22 06:58:44,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:44,053 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-12-22 06:58:44,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 06:58:44,053 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-12-22 06:58:44,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 06:58:44,055 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:44,055 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:44,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 06:58:44,270 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:44,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:44,271 INFO L82 PathProgramCache]: Analyzing trace with hash 848388148, now seen corresponding path program 7 times [2020-12-22 06:58:44,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:44,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837041443] [2020-12-22 06:58:44,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:44,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:44,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:44,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:44,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:44,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:44,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:44,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:44,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:44,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:44,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:45,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:45,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:45,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:45,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:45,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:45,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:45,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-12-22 06:58:45,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837041443] [2020-12-22 06:58:45,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064317382] [2020-12-22 06:58:45,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:58:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:45,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 128 conjunts are in the unsatisfiable core [2020-12-22 06:58:45,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:58:46,183 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-12-22 06:58:46,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:58:46,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 39 [2020-12-22 06:58:46,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077685434] [2020-12-22 06:58:46,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 06:58:46,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:46,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 06:58:46,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1400, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 06:58:46,189 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 39 states. [2020-12-22 06:58:48,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:48,317 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2020-12-22 06:58:48,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 06:58:48,317 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 110 [2020-12-22 06:58:48,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:48,319 INFO L225 Difference]: With dead ends: 111 [2020-12-22 06:58:48,319 INFO L226 Difference]: Without dead ends: 107 [2020-12-22 06:58:48,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=204, Invalid=4488, Unknown=0, NotChecked=0, Total=4692 [2020-12-22 06:58:48,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-22 06:58:48,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 66. [2020-12-22 06:58:48,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 06:58:48,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-12-22 06:58:48,327 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 110 [2020-12-22 06:58:48,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:48,328 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-12-22 06:58:48,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 06:58:48,328 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-12-22 06:58:48,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 06:58:48,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:48,329 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:48,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 06:58:48,543 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:48,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:48,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1860234972, now seen corresponding path program 7 times [2020-12-22 06:58:48,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:48,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907176270] [2020-12-22 06:58:48,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:48,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:48,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:48,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:48,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:48,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:48,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:49,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:49,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:49,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:49,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:49,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:49,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:49,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:49,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:49,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:49,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:50,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:50,292 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-12-22 06:58:50,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907176270] [2020-12-22 06:58:50,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572916446] [2020-12-22 06:58:50,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:58:50,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:50,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 136 conjunts are in the unsatisfiable core [2020-12-22 06:58:50,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:58:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-12-22 06:58:50,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:58:50,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 41 [2020-12-22 06:58:50,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651892633] [2020-12-22 06:58:50,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 06:58:50,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:50,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 06:58:50,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1555, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 06:58:50,788 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 41 states. [2020-12-22 06:58:53,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:53,275 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2020-12-22 06:58:53,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 06:58:53,276 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 117 [2020-12-22 06:58:53,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:53,277 INFO L225 Difference]: With dead ends: 117 [2020-12-22 06:58:53,277 INFO L226 Difference]: Without dead ends: 113 [2020-12-22 06:58:53,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=215, Invalid=5041, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 06:58:53,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-22 06:58:53,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-12-22 06:58:53,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 06:58:53,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-12-22 06:58:53,285 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 117 [2020-12-22 06:58:53,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:53,285 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-12-22 06:58:53,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 06:58:53,285 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-12-22 06:58:53,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 06:58:53,286 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:53,287 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:53,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:58:53,502 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:53,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:53,504 INFO L82 PathProgramCache]: Analyzing trace with hash 23995998, now seen corresponding path program 8 times [2020-12-22 06:58:53,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:53,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870764560] [2020-12-22 06:58:53,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:53,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:53,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:53,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:53,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:53,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:53,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:54,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:54,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:54,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:54,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:54,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:54,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:54,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:54,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:54,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:54,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:54,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:55,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:55,300 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-12-22 06:58:55,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870764560] [2020-12-22 06:58:55,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065171386] [2020-12-22 06:58:55,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:58:55,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 06:58:55,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 06:58:55,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 144 conjunts are in the unsatisfiable core [2020-12-22 06:58:55,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:58:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-12-22 06:58:55,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:58:55,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 43 [2020-12-22 06:58:55,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912657317] [2020-12-22 06:58:55,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 06:58:55,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:55,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 06:58:55,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1716, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 06:58:55,926 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 43 states. [2020-12-22 06:58:58,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:58,674 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2020-12-22 06:58:58,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 06:58:58,674 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 124 [2020-12-22 06:58:58,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:58,676 INFO L225 Difference]: With dead ends: 123 [2020-12-22 06:58:58,676 INFO L226 Difference]: Without dead ends: 119 [2020-12-22 06:58:58,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 152 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=228, Invalid=5624, Unknown=0, NotChecked=0, Total=5852 [2020-12-22 06:58:58,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-22 06:58:58,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 72. [2020-12-22 06:58:58,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 06:58:58,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-12-22 06:58:58,684 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 124 [2020-12-22 06:58:58,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:58,685 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-12-22 06:58:58,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 06:58:58,685 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-12-22 06:58:58,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 06:58:58,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:58,686 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:58,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:58:58,897 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:58,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:58,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1519753334, now seen corresponding path program 8 times [2020-12-22 06:58:58,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:58,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061662684] [2020-12-22 06:58:58,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:58,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:59,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:59,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:59,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:59,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:59,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:59,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:59,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:59,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:59,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:59,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:59,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:59,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:59,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:59,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:00,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:00,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:00,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:00,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:00,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:00,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:00,742 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-12-22 06:59:00,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061662684] [2020-12-22 06:59:00,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673880999] [2020-12-22 06:59:00,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:59:00,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 06:59:00,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 06:59:00,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 152 conjunts are in the unsatisfiable core [2020-12-22 06:59:00,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:59:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-12-22 06:59:01,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:59:01,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 44 [2020-12-22 06:59:01,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103158100] [2020-12-22 06:59:01,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 06:59:01,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:59:01,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 06:59:01,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1804, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 06:59:01,312 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 44 states. [2020-12-22 06:59:04,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:59:04,494 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2020-12-22 06:59:04,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 06:59:04,494 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 131 [2020-12-22 06:59:04,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:59:04,496 INFO L225 Difference]: With dead ends: 129 [2020-12-22 06:59:04,496 INFO L226 Difference]: Without dead ends: 125 [2020-12-22 06:59:04,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=233, Invalid=6087, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 06:59:04,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-22 06:59:04,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 75. [2020-12-22 06:59:04,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 06:59:04,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-12-22 06:59:04,504 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 131 [2020-12-22 06:59:04,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:59:04,505 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-12-22 06:59:04,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 06:59:04,505 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-12-22 06:59:04,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 06:59:04,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:59:04,506 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:59:04,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:59:04,719 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:59:04,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:59:04,720 INFO L82 PathProgramCache]: Analyzing trace with hash 128231176, now seen corresponding path program 9 times [2020-12-22 06:59:04,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:59:04,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581612575] [2020-12-22 06:59:04,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:59:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:04,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:04,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:04,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:05,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:05,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:05,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:05,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:05,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:05,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:05,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:05,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:05,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:05,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:05,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:05,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:05,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:05,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:05,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:06,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:06,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:06,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:06,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:06,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-12-22 06:59:06,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581612575] [2020-12-22 06:59:06,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287063971] [2020-12-22 06:59:06,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:59:06,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 06:59:06,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 06:59:06,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 160 conjunts are in the unsatisfiable core [2020-12-22 06:59:06,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:59:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-12-22 06:59:07,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:59:07,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 47 [2020-12-22 06:59:07,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22177762] [2020-12-22 06:59:07,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 06:59:07,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:59:07,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 06:59:07,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2064, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 06:59:07,499 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 47 states. [2020-12-22 06:59:10,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:59:10,868 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2020-12-22 06:59:10,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 06:59:10,872 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 138 [2020-12-22 06:59:10,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:59:10,876 INFO L225 Difference]: With dead ends: 135 [2020-12-22 06:59:10,876 INFO L226 Difference]: Without dead ends: 131 [2020-12-22 06:59:10,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=252, Invalid=6888, Unknown=0, NotChecked=0, Total=7140 [2020-12-22 06:59:10,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-22 06:59:10,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 78. [2020-12-22 06:59:10,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 06:59:10,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-12-22 06:59:10,886 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 138 [2020-12-22 06:59:10,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:59:10,887 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-12-22 06:59:10,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 06:59:10,887 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-12-22 06:59:10,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-22 06:59:10,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:59:10,888 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:59:11,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 06:59:11,102 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:59:11,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:59:11,103 INFO L82 PathProgramCache]: Analyzing trace with hash -219126640, now seen corresponding path program 9 times [2020-12-22 06:59:11,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:59:11,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006820710] [2020-12-22 06:59:11,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:59:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:11,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:11,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:11,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:11,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:11,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:11,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:11,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:11,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:11,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:11,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:11,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:12,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:12,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:12,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:12,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:12,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:12,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:12,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:12,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:12,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:12,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:12,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:13,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:13,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-12-22 06:59:13,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006820710] [2020-12-22 06:59:13,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846200053] [2020-12-22 06:59:13,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:59:13,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 06:59:13,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 06:59:13,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 168 conjunts are in the unsatisfiable core [2020-12-22 06:59:13,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:59:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-12-22 06:59:14,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:59:14,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 48 [2020-12-22 06:59:14,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309131065] [2020-12-22 06:59:14,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 06:59:14,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:59:14,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 06:59:14,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2159, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 06:59:14,160 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 48 states. [2020-12-22 06:59:18,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:59:18,050 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2020-12-22 06:59:18,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 06:59:18,050 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 145 [2020-12-22 06:59:18,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:59:18,052 INFO L225 Difference]: With dead ends: 141 [2020-12-22 06:59:18,052 INFO L226 Difference]: Without dead ends: 137 [2020-12-22 06:59:18,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=258, Invalid=7398, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 06:59:18,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-22 06:59:18,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 81. [2020-12-22 06:59:18,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 06:59:18,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-12-22 06:59:18,059 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 145 [2020-12-22 06:59:18,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:59:18,059 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-12-22 06:59:18,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 06:59:18,060 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-12-22 06:59:18,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-22 06:59:18,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:59:18,061 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:59:18,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 06:59:18,263 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:59:18,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:59:18,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1955824178, now seen corresponding path program 10 times [2020-12-22 06:59:18,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:59:18,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332064276] [2020-12-22 06:59:18,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:59:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:18,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:18,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:18,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:18,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:18,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:18,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:18,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:18,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:18,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:19,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:19,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:19,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:19,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:19,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:19,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:19,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:19,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:19,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:20,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:20,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:20,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:20,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:20,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-12-22 06:59:20,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332064276] [2020-12-22 06:59:20,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994983021] [2020-12-22 06:59:20,891 INFO L93 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:59:20,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 06:59:20,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 06:59:20,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 176 conjunts are in the unsatisfiable core [2020-12-22 06:59:20,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:59:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-12-22 06:59:21,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:59:21,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 51 [2020-12-22 06:59:21,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484912698] [2020-12-22 06:59:21,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 06:59:21,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:59:21,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 06:59:21,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2444, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 06:59:21,683 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 51 states. [2020-12-22 06:59:25,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:59:25,740 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2020-12-22 06:59:25,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 06:59:25,742 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 152 [2020-12-22 06:59:25,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:59:25,744 INFO L225 Difference]: With dead ends: 147 [2020-12-22 06:59:25,744 INFO L226 Difference]: Without dead ends: 143 [2020-12-22 06:59:25,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=276, Invalid=8280, Unknown=0, NotChecked=0, Total=8556 [2020-12-22 06:59:25,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-12-22 06:59:25,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 84. [2020-12-22 06:59:25,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-22 06:59:25,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-12-22 06:59:25,757 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 152 [2020-12-22 06:59:25,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:59:25,757 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-12-22 06:59:25,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 06:59:25,757 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-12-22 06:59:25,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-22 06:59:25,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:59:25,759 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:59:25,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 06:59:25,965 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:59:25,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:59:25,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1972833494, now seen corresponding path program 10 times [2020-12-22 06:59:25,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:59:25,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392791736] [2020-12-22 06:59:25,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:59:25,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:26,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:26,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:26,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:26,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:26,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:26,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:26,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:26,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:26,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:26,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:26,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:26,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:27,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:27,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:27,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:27,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:27,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:27,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:27,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:27,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:27,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:27,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:28,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:28,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:28,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:28,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2020-12-22 06:59:28,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392791736] [2020-12-22 06:59:28,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411696972] [2020-12-22 06:59:28,768 INFO L93 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:59:28,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 06:59:28,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 06:59:28,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 184 conjunts are in the unsatisfiable core [2020-12-22 06:59:28,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:59:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2020-12-22 06:59:29,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:59:29,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 52 [2020-12-22 06:59:29,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598721827] [2020-12-22 06:59:29,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 06:59:29,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:59:29,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 06:59:29,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2547, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 06:59:29,450 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 52 states. [2020-12-22 06:59:33,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:59:33,942 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2020-12-22 06:59:33,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 06:59:33,942 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 159 [2020-12-22 06:59:33,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:59:33,944 INFO L225 Difference]: With dead ends: 153 [2020-12-22 06:59:33,944 INFO L226 Difference]: Without dead ends: 149 [2020-12-22 06:59:33,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=282, Invalid=8838, Unknown=0, NotChecked=0, Total=9120 [2020-12-22 06:59:33,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-22 06:59:33,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 87. [2020-12-22 06:59:33,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 06:59:33,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-12-22 06:59:33,951 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 159 [2020-12-22 06:59:33,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:59:33,951 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-12-22 06:59:33,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 06:59:33,951 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-12-22 06:59:33,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 06:59:33,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:59:33,952 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:59:34,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 06:59:34,167 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:59:34,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:59:34,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1740548132, now seen corresponding path program 11 times [2020-12-22 06:59:34,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:59:34,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782215687] [2020-12-22 06:59:34,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:59:34,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:34,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:34,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:34,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:34,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:34,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:34,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:34,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:34,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:35,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:35,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:35,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:35,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:35,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:35,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:35,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:35,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:35,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:35,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:35,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:35,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:36,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:36,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:36,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:36,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:36,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:36,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-12-22 06:59:37,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782215687] [2020-12-22 06:59:37,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637358079] [2020-12-22 06:59:37,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:59:37,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 06:59:37,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 06:59:37,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 192 conjunts are in the unsatisfiable core [2020-12-22 06:59:37,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:59:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-12-22 06:59:38,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:59:38,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 55 [2020-12-22 06:59:38,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318031709] [2020-12-22 06:59:38,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-22 06:59:38,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:59:38,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-22 06:59:38,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=2856, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 06:59:38,079 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 55 states. [2020-12-22 06:59:43,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:59:43,066 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2020-12-22 06:59:43,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 06:59:43,067 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 166 [2020-12-22 06:59:43,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:59:43,069 INFO L225 Difference]: With dead ends: 159 [2020-12-22 06:59:43,069 INFO L226 Difference]: Without dead ends: 155 [2020-12-22 06:59:43,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 206 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=300, Invalid=9800, Unknown=0, NotChecked=0, Total=10100 [2020-12-22 06:59:43,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-22 06:59:43,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 90. [2020-12-22 06:59:43,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-22 06:59:43,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-12-22 06:59:43,076 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 166 [2020-12-22 06:59:43,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:59:43,077 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-12-22 06:59:43,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-22 06:59:43,077 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-12-22 06:59:43,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-22 06:59:43,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:59:43,078 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:59:43,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 06:59:43,293 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:59:43,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:59:43,293 INFO L82 PathProgramCache]: Analyzing trace with hash 85910596, now seen corresponding path program 11 times [2020-12-22 06:59:43,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:59:43,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136100789] [2020-12-22 06:59:43,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:59:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:43,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:43,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:43,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:43,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:43,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:43,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:43,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:43,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:43,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:43,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:44,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:44,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:44,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:44,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:44,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:44,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:44,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:44,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:44,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:45,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:45,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:45,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:45,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:45,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:45,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:46,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:46,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2020-12-22 06:59:46,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136100789] [2020-12-22 06:59:46,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849197098] [2020-12-22 06:59:46,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:59:46,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 06:59:46,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 06:59:46,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 200 conjunts are in the unsatisfiable core [2020-12-22 06:59:46,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:59:47,491 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2020-12-22 06:59:47,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:59:47,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 57 [2020-12-22 06:59:47,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799888341] [2020-12-22 06:59:47,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-22 06:59:47,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:59:47,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-22 06:59:47,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3075, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 06:59:47,493 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 57 states. [2020-12-22 06:59:52,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:59:52,930 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2020-12-22 06:59:52,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 06:59:52,930 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 173 [2020-12-22 06:59:52,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:59:52,932 INFO L225 Difference]: With dead ends: 165 [2020-12-22 06:59:52,932 INFO L226 Difference]: Without dead ends: 161 [2020-12-22 06:59:52,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=311, Invalid=10609, Unknown=0, NotChecked=0, Total=10920 [2020-12-22 06:59:52,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-22 06:59:52,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 93. [2020-12-22 06:59:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 06:59:52,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2020-12-22 06:59:52,939 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 173 [2020-12-22 06:59:52,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:59:52,939 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2020-12-22 06:59:52,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-22 06:59:52,940 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2020-12-22 06:59:52,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-12-22 06:59:52,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:59:52,941 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:59:53,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:59:53,156 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:59:53,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:59:53,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1923299322, now seen corresponding path program 12 times [2020-12-22 06:59:53,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:59:53,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684258658] [2020-12-22 06:59:53,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:59:53,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:53,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:53,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:53,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:53,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:53,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:53,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:53,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:53,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:53,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:53,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:53,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:53,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:53,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:54,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:54,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:54,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:54,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:54,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:54,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:54,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:55,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:55,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:55,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:55,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:55,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:55,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:55,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:55,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:56,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:56,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:56,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:59:56,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:59:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2020-12-22 06:59:56,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684258658] [2020-12-22 06:59:56,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461055969] [2020-12-22 06:59:56,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:59:57,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 06:59:57,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 06:59:57,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 208 conjunts are in the unsatisfiable core [2020-12-22 06:59:57,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:59:57,909 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2020-12-22 06:59:57,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:59:57,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 59 [2020-12-22 06:59:57,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339317484] [2020-12-22 06:59:57,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-22 06:59:57,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:59:57,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-22 06:59:57,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=3300, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 06:59:57,912 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 59 states. [2020-12-22 07:00:03,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:00:03,852 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2020-12-22 07:00:03,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-22 07:00:03,853 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 180 [2020-12-22 07:00:03,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:00:03,854 INFO L225 Difference]: With dead ends: 171 [2020-12-22 07:00:03,854 INFO L226 Difference]: Without dead ends: 167 [2020-12-22 07:00:03,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 224 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=324, Invalid=11448, Unknown=0, NotChecked=0, Total=11772 [2020-12-22 07:00:03,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-22 07:00:03,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 96. [2020-12-22 07:00:03,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-22 07:00:03,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-12-22 07:00:03,860 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 180 [2020-12-22 07:00:03,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:00:03,861 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-12-22 07:00:03,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-22 07:00:03,861 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-12-22 07:00:03,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-12-22 07:00:03,862 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:00:03,862 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:00:04,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 07:00:04,077 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:00:04,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:00:04,078 INFO L82 PathProgramCache]: Analyzing trace with hash 853137374, now seen corresponding path program 12 times [2020-12-22 07:00:04,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:00:04,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442629075] [2020-12-22 07:00:04,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:00:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:04,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:04,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:04,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:04,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:04,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:04,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:04,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:04,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:04,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:04,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:04,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:04,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:05,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:05,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:05,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:05,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:05,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:05,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:05,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:05,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:05,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:06,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:06,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:06,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:06,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:06,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:06,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:06,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:06,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:07,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:07,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:07,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:07,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-12-22 07:00:08,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442629075] [2020-12-22 07:00:08,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554125399] [2020-12-22 07:00:08,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:00:08,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 07:00:08,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:00:08,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 216 conjunts are in the unsatisfiable core [2020-12-22 07:00:08,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:00:08,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-12-22 07:00:08,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:00:08,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 58] total 60 [2020-12-22 07:00:08,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500324740] [2020-12-22 07:00:08,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-22 07:00:08,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:00:08,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-22 07:00:08,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3419, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 07:00:08,844 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 60 states. [2020-12-22 07:00:15,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:00:15,173 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2020-12-22 07:00:15,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-22 07:00:15,173 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 187 [2020-12-22 07:00:15,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:00:15,175 INFO L225 Difference]: With dead ends: 177 [2020-12-22 07:00:15,175 INFO L226 Difference]: Without dead ends: 173 [2020-12-22 07:00:15,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 235 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1434 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=330, Invalid=12102, Unknown=0, NotChecked=0, Total=12432 [2020-12-22 07:00:15,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-12-22 07:00:15,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 99. [2020-12-22 07:00:15,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-22 07:00:15,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-12-22 07:00:15,183 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 187 [2020-12-22 07:00:15,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:00:15,183 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-12-22 07:00:15,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-22 07:00:15,184 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-12-22 07:00:15,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-22 07:00:15,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:00:15,185 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:00:15,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 07:00:15,400 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:00:15,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:00:15,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1664905904, now seen corresponding path program 13 times [2020-12-22 07:00:15,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:00:15,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349794969] [2020-12-22 07:00:15,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:00:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:15,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:15,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:15,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:15,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:15,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:16,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:16,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:16,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:16,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:16,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:16,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:16,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:16,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:16,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:17,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:17,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:17,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:17,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:17,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:17,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:17,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:18,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:18,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:18,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:18,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:18,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:18,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:18,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:19,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:19,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:19,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2020-12-22 07:00:20,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349794969] [2020-12-22 07:00:20,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675570199] [2020-12-22 07:00:20,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:00:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:20,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 224 conjunts are in the unsatisfiable core [2020-12-22 07:00:20,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:00:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2020-12-22 07:00:21,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:00:21,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 63 [2020-12-22 07:00:21,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868118885] [2020-12-22 07:00:21,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-22 07:00:21,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:00:21,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-22 07:00:21,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=3776, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 07:00:21,042 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 63 states. [2020-12-22 07:00:27,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:00:27,789 INFO L93 Difference]: Finished difference Result 183 states and 185 transitions. [2020-12-22 07:00:27,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-22 07:00:27,792 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 194 [2020-12-22 07:00:27,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:00:27,793 INFO L225 Difference]: With dead ends: 183 [2020-12-22 07:00:27,793 INFO L226 Difference]: Without dead ends: 179 [2020-12-22 07:00:27,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 242 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=348, Invalid=13224, Unknown=0, NotChecked=0, Total=13572 [2020-12-22 07:00:27,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-12-22 07:00:27,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 102. [2020-12-22 07:00:27,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-22 07:00:27,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-12-22 07:00:27,801 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 194 [2020-12-22 07:00:27,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:00:27,802 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-12-22 07:00:27,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-22 07:00:27,802 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-12-22 07:00:27,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-12-22 07:00:27,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:00:27,803 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:00:28,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:00:28,016 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:00:28,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:00:28,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1458999816, now seen corresponding path program 13 times [2020-12-22 07:00:28,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:00:28,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755787245] [2020-12-22 07:00:28,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:00:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:28,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:28,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:28,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:28,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:28,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:28,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:28,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:28,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:28,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:28,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:28,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:28,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:29,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:29,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:29,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:29,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:29,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:29,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:29,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:30,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:30,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:30,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:30,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:30,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:30,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:30,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:31,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:31,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:31,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:31,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:31,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:32,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:32,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-12-22 07:00:32,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755787245] [2020-12-22 07:00:32,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671616217] [2020-12-22 07:00:32,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:00:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:32,738 WARN L261 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 232 conjunts are in the unsatisfiable core [2020-12-22 07:00:32,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:00:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-12-22 07:00:33,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:00:33,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 62] total 64 [2020-12-22 07:00:33,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466911367] [2020-12-22 07:00:33,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-22 07:00:33,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:00:33,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-22 07:00:33,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=3903, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 07:00:33,490 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 64 states. [2020-12-22 07:00:40,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:00:40,779 INFO L93 Difference]: Finished difference Result 189 states and 191 transitions. [2020-12-22 07:00:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 07:00:40,779 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 201 [2020-12-22 07:00:40,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:00:40,781 INFO L225 Difference]: With dead ends: 189 [2020-12-22 07:00:40,781 INFO L226 Difference]: Without dead ends: 185 [2020-12-22 07:00:40,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 253 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1656 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=354, Invalid=13926, Unknown=0, NotChecked=0, Total=14280 [2020-12-22 07:00:40,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-22 07:00:40,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 105. [2020-12-22 07:00:40,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-22 07:00:40,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-12-22 07:00:40,788 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 201 [2020-12-22 07:00:40,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:00:40,789 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-12-22 07:00:40,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-22 07:00:40,789 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-12-22 07:00:40,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-12-22 07:00:40,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:00:40,790 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:00:41,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:00:41,005 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:00:41,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:00:41,006 INFO L82 PathProgramCache]: Analyzing trace with hash -941688870, now seen corresponding path program 14 times [2020-12-22 07:00:41,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:00:41,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619690475] [2020-12-22 07:00:41,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:00:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:41,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:41,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:41,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:41,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:41,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:41,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:41,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:41,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:41,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:41,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:41,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:42,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:42,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:42,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:42,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:42,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:42,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:42,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:43,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:43,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:43,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:43,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:43,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:43,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:44,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:44,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:44,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:44,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:44,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:45,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:45,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:45,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-12-22 07:00:46,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619690475] [2020-12-22 07:00:46,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577805045] [2020-12-22 07:00:46,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:00:46,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 07:00:46,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:00:46,313 WARN L261 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 240 conjunts are in the unsatisfiable core [2020-12-22 07:00:46,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:00:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-12-22 07:00:47,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:00:47,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 67 [2020-12-22 07:00:47,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057791732] [2020-12-22 07:00:47,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-22 07:00:47,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:00:47,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-22 07:00:47,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=4284, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 07:00:47,254 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 67 states. [2020-12-22 07:00:55,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:00:55,046 INFO L93 Difference]: Finished difference Result 195 states and 197 transitions. [2020-12-22 07:00:55,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-22 07:00:55,047 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 208 [2020-12-22 07:00:55,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:00:55,048 INFO L225 Difference]: With dead ends: 195 [2020-12-22 07:00:55,048 INFO L226 Difference]: Without dead ends: 191 [2020-12-22 07:00:55,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 260 SyntacticMatches, 3 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=372, Invalid=15128, Unknown=0, NotChecked=0, Total=15500 [2020-12-22 07:00:55,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-12-22 07:00:55,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 108. [2020-12-22 07:00:55,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-22 07:00:55,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2020-12-22 07:00:55,057 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 208 [2020-12-22 07:00:55,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:00:55,057 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2020-12-22 07:00:55,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-22 07:00:55,057 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2020-12-22 07:00:55,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-12-22 07:00:55,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:00:55,059 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:00:55,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 07:00:55,273 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:00:55,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:00:55,274 INFO L82 PathProgramCache]: Analyzing trace with hash 482690706, now seen corresponding path program 14 times [2020-12-22 07:00:55,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:00:55,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120645738] [2020-12-22 07:00:55,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:00:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:55,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:55,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:55,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:55,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:55,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:55,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:55,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:55,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:55,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:55,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:56,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:56,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:56,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:56,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:56,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:56,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:56,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:56,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:57,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:57,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:57,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:57,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:57,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:57,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:58,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:58,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:58,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:58,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:58,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:59,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:59,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:59,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:59,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:00:59,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:00:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:00,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-12-22 07:01:00,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120645738] [2020-12-22 07:01:00,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069429478] [2020-12-22 07:01:00,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:01:00,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 07:01:00,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:01:00,939 WARN L261 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 248 conjunts are in the unsatisfiable core [2020-12-22 07:01:00,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:01:01,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-12-22 07:01:01,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:01:01,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 69 [2020-12-22 07:01:01,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146985438] [2020-12-22 07:01:01,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-22 07:01:01,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:01:01,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-22 07:01:01,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4551, Unknown=0, NotChecked=0, Total=4692 [2020-12-22 07:01:01,806 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 69 states. [2020-12-22 07:01:10,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:01:10,525 INFO L93 Difference]: Finished difference Result 201 states and 203 transitions. [2020-12-22 07:01:10,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-22 07:01:10,525 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 215 [2020-12-22 07:01:10,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:01:10,527 INFO L225 Difference]: With dead ends: 201 [2020-12-22 07:01:10,528 INFO L226 Difference]: Without dead ends: 197 [2020-12-22 07:01:10,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=383, Invalid=16129, Unknown=0, NotChecked=0, Total=16512 [2020-12-22 07:01:10,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-22 07:01:10,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 111. [2020-12-22 07:01:10,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-22 07:01:10,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2020-12-22 07:01:10,536 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 215 [2020-12-22 07:01:10,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:01:10,536 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2020-12-22 07:01:10,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-22 07:01:10,536 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2020-12-22 07:01:10,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-12-22 07:01:10,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:01:10,538 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:01:10,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:01:10,752 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:01:10,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:01:10,753 INFO L82 PathProgramCache]: Analyzing trace with hash 837482372, now seen corresponding path program 15 times [2020-12-22 07:01:10,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:01:10,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545174446] [2020-12-22 07:01:10,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:01:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:10,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:11,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:11,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:11,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:11,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:11,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:11,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:11,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:11,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:11,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:11,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:11,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:11,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:11,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:11,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:12,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:12,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:12,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:12,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:12,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:12,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:12,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:12,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:12,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:13,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:13,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:13,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:13,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:13,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:13,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:13,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:14,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:14,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:14,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:14,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:14,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:14,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:15,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:15,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:15,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:15,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2020-12-22 07:01:16,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545174446] [2020-12-22 07:01:16,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887204053] [2020-12-22 07:01:16,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:01:17,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 07:01:17,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:01:17,085 WARN L261 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 256 conjunts are in the unsatisfiable core [2020-12-22 07:01:17,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:01:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2020-12-22 07:01:18,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:01:18,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 71 [2020-12-22 07:01:18,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167692169] [2020-12-22 07:01:18,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-22 07:01:18,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:01:18,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-22 07:01:18,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=4824, Unknown=0, NotChecked=0, Total=4970 [2020-12-22 07:01:18,186 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 71 states. [2020-12-22 07:01:28,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:01:28,174 INFO L93 Difference]: Finished difference Result 207 states and 209 transitions. [2020-12-22 07:01:28,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-22 07:01:28,175 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 222 [2020-12-22 07:01:28,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:01:28,177 INFO L225 Difference]: With dead ends: 207 [2020-12-22 07:01:28,177 INFO L226 Difference]: Without dead ends: 203 [2020-12-22 07:01:28,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 278 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=396, Invalid=17160, Unknown=0, NotChecked=0, Total=17556 [2020-12-22 07:01:28,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-12-22 07:01:28,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 114. [2020-12-22 07:01:28,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-22 07:01:28,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-12-22 07:01:28,185 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 222 [2020-12-22 07:01:28,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:01:28,185 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-12-22 07:01:28,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-22 07:01:28,186 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-12-22 07:01:28,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-12-22 07:01:28,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:01:28,187 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:01:28,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 07:01:28,402 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:01:28,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:01:28,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1020068268, now seen corresponding path program 15 times [2020-12-22 07:01:28,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:01:28,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272821434] [2020-12-22 07:01:28,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:01:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:28,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:28,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:28,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:28,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:28,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:28,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:29,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:29,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:29,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:29,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:29,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:29,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:29,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:29,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:29,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:29,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:29,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:30,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:30,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:30,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:30,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:30,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:30,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:30,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:30,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:31,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:31,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:31,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:31,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:31,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:31,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:32,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:32,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:32,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:32,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:32,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:33,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:33,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:33,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:34,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 07:01:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:01:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2020-12-22 07:01:34,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272821434] [2020-12-22 07:01:34,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234191136] [2020-12-22 07:01:34,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:01:35,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 07:01:35,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:01:35,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 200 conjunts are in the unsatisfiable core [2020-12-22 07:01:35,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:01:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2020-12-22 07:01:46,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:01:46,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 135 [2020-12-22 07:01:46,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524680828] [2020-12-22 07:01:46,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 135 states [2020-12-22 07:01:46,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:01:46,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2020-12-22 07:01:46,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=17758, Unknown=0, NotChecked=0, Total=18090 [2020-12-22 07:01:46,365 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 135 states.