/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:01:57,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:01:57,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:01:57,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:01:57,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:01:57,540 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:01:57,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:01:57,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:01:57,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:01:57,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:01:57,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:01:57,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:01:57,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:01:57,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:01:57,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:01:57,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:01:57,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:01:57,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:01:57,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:01:57,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:01:57,591 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:01:57,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:01:57,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:01:57,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:01:57,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:01:57,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:01:57,623 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:01:57,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:01:57,625 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:01:57,683 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:01:57,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:01:57,687 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:01:57,687 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:01:57,688 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:01:57,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:01:57,688 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:01:57,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:01:57,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:01:57,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:01:57,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:01:57,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:01:57,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:01:57,691 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:01:57,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:01:57,692 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:01:57,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:01:57,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:01:57,693 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:01:57,693 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:01:57,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:01:57,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:01:57,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:01:57,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:01:57,695 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:01:57,695 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:01:57,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:01:57,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:01:57,696 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:01:57,696 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:01:58,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:01:58,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:01:58,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:01:58,159 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:01:58,159 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:01:58,160 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-11-06 22:01:58,233 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ca7605d2/582d9d3678fd4aed9379aab205c809dd/FLAG7d05ec377 [2020-11-06 22:01:58,888 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:01:58,889 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-11-06 22:01:58,896 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ca7605d2/582d9d3678fd4aed9379aab205c809dd/FLAG7d05ec377 [2020-11-06 22:01:58,919 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ca7605d2/582d9d3678fd4aed9379aab205c809dd [2020-11-06 22:01:58,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:01:58,932 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:01:58,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:01:58,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:01:58,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:01:58,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:01:58" (1/1) ... [2020-11-06 22:01:58,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62889a3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:58, skipping insertion in model container [2020-11-06 22:01:58,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:01:58" (1/1) ... [2020-11-06 22:01:58,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:01:58,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:01:59,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:01:59,136 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:01:59,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:01:59,171 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:01:59,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:59 WrapperNode [2020-11-06 22:01:59,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:01:59,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:01:59,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:01:59,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:01:59,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:59" (1/1) ... [2020-11-06 22:01:59,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:59" (1/1) ... [2020-11-06 22:01:59,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:59" (1/1) ... [2020-11-06 22:01:59,194 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:59" (1/1) ... [2020-11-06 22:01:59,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:59" (1/1) ... [2020-11-06 22:01:59,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:59" (1/1) ... [2020-11-06 22:01:59,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:59" (1/1) ... [2020-11-06 22:01:59,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:01:59,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:01:59,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:01:59,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:01:59,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:59" (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 [2020-11-06 22:01:59,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:01:59,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:01:59,288 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:01:59,288 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-11-06 22:01:59,288 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:01:59,288 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:01:59,288 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:01:59,289 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:01:59,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:01:59,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:01:59,289 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-11-06 22:01:59,289 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:01:59,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:01:59,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:01:59,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:01:59,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:01:59,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:01:59,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:01:59,697 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:01:59,700 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 22:01:59,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:01:59 BoogieIcfgContainer [2020-11-06 22:01:59,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:01:59,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:01:59,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:01:59,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:01:59,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:01:58" (1/3) ... [2020-11-06 22:01:59,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e0164c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:01:59, skipping insertion in model container [2020-11-06 22:01:59,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:59" (2/3) ... [2020-11-06 22:01:59,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e0164c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:01:59, skipping insertion in model container [2020-11-06 22:01:59,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:01:59" (3/3) ... [2020-11-06 22:01:59,742 INFO L111 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2020-11-06 22:01:59,804 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:01:59,812 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:01:59,836 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:01:59,880 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:01:59,880 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:01:59,880 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:01:59,880 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:01:59,880 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:01:59,880 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:01:59,881 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:01:59,881 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:01:59,911 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-11-06 22:01:59,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-06 22:01:59,922 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:01:59,923 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:01:59,923 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:01:59,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:01:59,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1194287852, now seen corresponding path program 1 times [2020-11-06 22:01:59,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:01:59,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490348265] [2020-11-06 22:01:59,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:00,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:00,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:02:00,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:00,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-06 22:02:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 22:02:00,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490348265] [2020-11-06 22:02:00,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824207987] [2020-11-06 22:02:00,414 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 [2020-11-06 22:02:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:00,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-06 22:02:00,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:02:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 22:02:00,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:02:00,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-11-06 22:02:00,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285735267] [2020-11-06 22:02:00,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:02:00,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:00,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:02:00,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:02:00,607 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 7 states. [2020-11-06 22:02:01,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:01,019 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2020-11-06 22:02:01,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:02:01,021 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-11-06 22:02:01,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:01,031 INFO L225 Difference]: With dead ends: 47 [2020-11-06 22:02:01,031 INFO L226 Difference]: Without dead ends: 27 [2020-11-06 22:02:01,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:02:01,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-06 22:02:01,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-06 22:02:01,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-06 22:02:01,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-11-06 22:02:01,086 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 25 [2020-11-06 22:02:01,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:01,086 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-11-06 22:02:01,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:02:01,087 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-11-06 22:02:01,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-06 22:02:01,089 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:01,090 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:02:01,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-11-06 22:02:01,305 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:01,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:01,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1048309379, now seen corresponding path program 1 times [2020-11-06 22:02:01,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:01,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386158554] [2020-11-06 22:02:01,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:01,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:01,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:02:01,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:01,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:01,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-06 22:02:01,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:01,489 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-06 22:02:01,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386158554] [2020-11-06 22:02:01,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:02:01,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:02:01,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559341597] [2020-11-06 22:02:01,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:02:01,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:01,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:02:01,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:02:01,493 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 6 states. [2020-11-06 22:02:01,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:01,699 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-11-06 22:02:01,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:02:01,700 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-11-06 22:02:01,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:01,702 INFO L225 Difference]: With dead ends: 32 [2020-11-06 22:02:01,702 INFO L226 Difference]: Without dead ends: 27 [2020-11-06 22:02:01,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:02:01,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-06 22:02:01,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-06 22:02:01,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-06 22:02:01,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-11-06 22:02:01,713 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 32 [2020-11-06 22:02:01,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:01,714 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-11-06 22:02:01,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:02:01,714 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-11-06 22:02:01,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-06 22:02:01,716 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:01,716 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:02:01,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:02:01,717 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:01,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:01,718 INFO L82 PathProgramCache]: Analyzing trace with hash 194475198, now seen corresponding path program 2 times [2020-11-06 22:02:01,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:01,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96610225] [2020-11-06 22:02:01,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:01,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:01,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:02:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:02,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:02,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-06 22:02:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:02,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-06 22:02:02,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96610225] [2020-11-06 22:02:02,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408028439] [2020-11-06 22:02:02,235 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 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 [2020-11-06 22:02:02,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:02:02,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:02:02,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-06 22:02:02,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:02:02,747 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-06 22:02:02,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:02:02,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 25 [2020-11-06 22:02:02,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257326007] [2020-11-06 22:02:02,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-06 22:02:02,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:02,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-06 22:02:02,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2020-11-06 22:02:02,750 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 25 states. [2020-11-06 22:02:03,355 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-11-06 22:02:04,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:04,005 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2020-11-06 22:02:04,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-06 22:02:04,005 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 39 [2020-11-06 22:02:04,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:04,008 INFO L225 Difference]: With dead ends: 45 [2020-11-06 22:02:04,008 INFO L226 Difference]: Without dead ends: 40 [2020-11-06 22:02:04,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2020-11-06 22:02:04,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-06 22:02:04,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2020-11-06 22:02:04,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-06 22:02:04,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2020-11-06 22:02:04,024 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 39 [2020-11-06 22:02:04,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:04,025 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2020-11-06 22:02:04,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-06 22:02:04,025 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2020-11-06 22:02:04,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-06 22:02:04,027 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:04,028 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:02:04,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:02:04,242 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:04,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:04,243 INFO L82 PathProgramCache]: Analyzing trace with hash 374161366, now seen corresponding path program 1 times [2020-11-06 22:02:04,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:04,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340252882] [2020-11-06 22:02:04,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:04,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:04,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:02:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:04,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:04,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-06 22:02:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:04,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:04,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:02:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-06 22:02:04,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340252882] [2020-11-06 22:02:04,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275553018] [2020-11-06 22:02:04,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:02:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:04,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:02:04,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:02:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-06 22:02:04,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:02:04,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2020-11-06 22:02:04,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253160031] [2020-11-06 22:02:04,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-06 22:02:04,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:04,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-06 22:02:04,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:02:04,612 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 10 states. [2020-11-06 22:02:04,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:04,957 INFO L93 Difference]: Finished difference Result 57 states and 81 transitions. [2020-11-06 22:02:04,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:02:04,958 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-11-06 22:02:04,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:04,959 INFO L225 Difference]: With dead ends: 57 [2020-11-06 22:02:04,959 INFO L226 Difference]: Without dead ends: 30 [2020-11-06 22:02:04,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:02:04,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-06 22:02:04,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-06 22:02:04,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-06 22:02:04,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-11-06 22:02:04,971 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 45 [2020-11-06 22:02:04,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:04,971 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-11-06 22:02:04,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-06 22:02:04,972 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-11-06 22:02:04,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-06 22:02:04,973 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:04,974 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:02:05,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:02:05,190 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:05,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:05,191 INFO L82 PathProgramCache]: Analyzing trace with hash 420713135, now seen corresponding path program 3 times [2020-11-06 22:02:05,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:05,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819350215] [2020-11-06 22:02:05,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:05,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:05,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:05,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:02:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:05,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:05,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-06 22:02:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:05,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:05,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-06 22:02:05,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819350215] [2020-11-06 22:02:05,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513480571] [2020-11-06 22:02:05,783 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 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 [2020-11-06 22:02:05,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-06 22:02:05,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:02:05,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 57 conjunts are in the unsatisfiable core [2020-11-06 22:02:05,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:02:06,567 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-06 22:02:06,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:02:06,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 34 [2020-11-06 22:02:06,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139566196] [2020-11-06 22:02:06,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-06 22:02:06,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:06,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-06 22:02:06,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2020-11-06 22:02:06,571 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 34 states. [2020-11-06 22:02:08,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:08,052 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-11-06 22:02:08,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-06 22:02:08,052 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 46 [2020-11-06 22:02:08,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:08,055 INFO L225 Difference]: With dead ends: 41 [2020-11-06 22:02:08,055 INFO L226 Difference]: Without dead ends: 36 [2020-11-06 22:02:08,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=237, Invalid=1833, Unknown=0, NotChecked=0, Total=2070 [2020-11-06 22:02:08,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-06 22:02:08,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-11-06 22:02:08,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-06 22:02:08,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-11-06 22:02:08,067 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 46 [2020-11-06 22:02:08,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:08,068 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-11-06 22:02:08,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-06 22:02:08,068 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-11-06 22:02:08,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-06 22:02:08,070 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:08,070 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:02:08,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:02:08,285 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:08,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:08,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1715691020, now seen corresponding path program 4 times [2020-11-06 22:02:08,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:08,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149257105] [2020-11-06 22:02:08,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:08,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:08,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:02:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:08,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:08,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-06 22:02:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:08,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:08,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:08,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 14 proven. 44 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-11-06 22:02:08,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149257105] [2020-11-06 22:02:08,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161643051] [2020-11-06 22:02:08,934 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 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 [2020-11-06 22:02:09,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:02:09,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:02:09,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 69 conjunts are in the unsatisfiable core [2020-11-06 22:02:09,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:02:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-11-06 22:02:09,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:02:09,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 38 [2020-11-06 22:02:09,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180262812] [2020-11-06 22:02:09,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-06 22:02:09,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:09,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-06 22:02:09,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1293, Unknown=0, NotChecked=0, Total=1406 [2020-11-06 22:02:09,915 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 38 states. [2020-11-06 22:02:11,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:11,782 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-11-06 22:02:11,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-06 22:02:11,782 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 53 [2020-11-06 22:02:11,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:11,784 INFO L225 Difference]: With dead ends: 44 [2020-11-06 22:02:11,784 INFO L226 Difference]: Without dead ends: 39 [2020-11-06 22:02:11,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=277, Invalid=2375, Unknown=0, NotChecked=0, Total=2652 [2020-11-06 22:02:11,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-06 22:02:11,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-11-06 22:02:11,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-06 22:02:11,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-11-06 22:02:11,798 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 53 [2020-11-06 22:02:11,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:11,798 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-11-06 22:02:11,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-06 22:02:11,799 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-11-06 22:02:11,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-06 22:02:11,800 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:11,801 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:02:12,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-06 22:02:12,015 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:12,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:12,016 INFO L82 PathProgramCache]: Analyzing trace with hash -663685407, now seen corresponding path program 5 times [2020-11-06 22:02:12,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:12,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626644696] [2020-11-06 22:02:12,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:12,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:12,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:02:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:12,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:12,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-06 22:02:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:12,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:12,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:12,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:12,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 18 proven. 62 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-11-06 22:02:12,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626644696] [2020-11-06 22:02:12,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957525090] [2020-11-06 22:02:12,758 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 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 [2020-11-06 22:02:12,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-06 22:02:12,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:02:12,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 81 conjunts are in the unsatisfiable core [2020-11-06 22:02:12,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:02:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 27 proven. 59 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-11-06 22:02:13,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:02:13,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 42 [2020-11-06 22:02:13,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019223406] [2020-11-06 22:02:13,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-06 22:02:13,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:13,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-06 22:02:13,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1599, Unknown=0, NotChecked=0, Total=1722 [2020-11-06 22:02:13,873 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 42 states. [2020-11-06 22:02:16,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:16,312 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-11-06 22:02:16,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-06 22:02:16,312 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 60 [2020-11-06 22:02:16,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:16,317 INFO L225 Difference]: With dead ends: 47 [2020-11-06 22:02:16,317 INFO L226 Difference]: Without dead ends: 42 [2020-11-06 22:02:16,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=317, Invalid=2989, Unknown=0, NotChecked=0, Total=3306 [2020-11-06 22:02:16,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-06 22:02:16,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-11-06 22:02:16,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-06 22:02:16,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2020-11-06 22:02:16,341 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 60 [2020-11-06 22:02:16,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:16,342 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2020-11-06 22:02:16,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-06 22:02:16,342 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2020-11-06 22:02:16,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-06 22:02:16,344 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:16,344 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:02:16,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:02:16,545 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:16,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:16,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1578989282, now seen corresponding path program 6 times [2020-11-06 22:02:16,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:16,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478910006] [2020-11-06 22:02:16,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:16,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:16,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:02:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:16,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:16,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:16,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-06 22:02:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:16,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:17,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:17,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:17,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:17,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-11-06 22:02:17,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478910006] [2020-11-06 22:02:17,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817344656] [2020-11-06 22:02:17,339 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 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 [2020-11-06 22:02:17,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-06 22:02:17,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:02:17,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 97 conjunts are in the unsatisfiable core [2020-11-06 22:02:17,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:02:18,450 INFO L721 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-06 22:02:18,534 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-11-06 22:02:18,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:02:18,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-11-06 22:02:18,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229524250] [2020-11-06 22:02:18,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-06 22:02:18,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:18,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-06 22:02:18,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1379, Unknown=0, NotChecked=0, Total=1482 [2020-11-06 22:02:18,537 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 25 states. [2020-11-06 22:02:20,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:20,778 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2020-11-06 22:02:20,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-06 22:02:20,779 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 67 [2020-11-06 22:02:20,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:20,782 INFO L225 Difference]: With dead ends: 49 [2020-11-06 22:02:20,782 INFO L226 Difference]: Without dead ends: 44 [2020-11-06 22:02:20,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=262, Invalid=2708, Unknown=0, NotChecked=0, Total=2970 [2020-11-06 22:02:20,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-06 22:02:20,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-11-06 22:02:20,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-06 22:02:20,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 56 transitions. [2020-11-06 22:02:20,796 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 56 transitions. Word has length 67 [2020-11-06 22:02:20,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:20,796 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 56 transitions. [2020-11-06 22:02:20,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-06 22:02:20,796 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 56 transitions. [2020-11-06 22:02:20,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-06 22:02:20,798 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:20,798 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:02:21,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:02:21,012 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:21,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:21,013 INFO L82 PathProgramCache]: Analyzing trace with hash -777444436, now seen corresponding path program 7 times [2020-11-06 22:02:21,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:21,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395137544] [2020-11-06 22:02:21,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:21,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:21,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:02:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:21,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:21,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:21,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-06 22:02:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:21,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:21,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:21,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-11-06 22:02:21,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395137544] [2020-11-06 22:02:21,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406744874] [2020-11-06 22:02:21,411 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 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 [2020-11-06 22:02:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:21,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 73 conjunts are in the unsatisfiable core [2020-11-06 22:02:21,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:02:21,910 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-11-06 22:02:21,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:02:21,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2020-11-06 22:02:21,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421720753] [2020-11-06 22:02:21,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-06 22:02:21,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:21,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-06 22:02:21,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2020-11-06 22:02:21,913 INFO L87 Difference]: Start difference. First operand 41 states and 56 transitions. Second operand 26 states. [2020-11-06 22:02:23,435 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-06 22:02:23,611 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-11-06 22:02:23,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:23,612 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2020-11-06 22:02:23,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-06 22:02:23,613 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 53 [2020-11-06 22:02:23,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:23,616 INFO L225 Difference]: With dead ends: 51 [2020-11-06 22:02:23,616 INFO L226 Difference]: Without dead ends: 44 [2020-11-06 22:02:23,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2020-11-06 22:02:23,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-06 22:02:23,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-11-06 22:02:23,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-06 22:02:23,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2020-11-06 22:02:23,627 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 53 [2020-11-06 22:02:23,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:23,628 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2020-11-06 22:02:23,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-06 22:02:23,628 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2020-11-06 22:02:23,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-06 22:02:23,629 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:23,629 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:02:23,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-06 22:02:23,843 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:23,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:23,844 INFO L82 PathProgramCache]: Analyzing trace with hash 517285487, now seen corresponding path program 8 times [2020-11-06 22:02:23,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:23,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920904374] [2020-11-06 22:02:23,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:23,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:23,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:23,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:02:23,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:24,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:24,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:24,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:24,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-06 22:02:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:24,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:24,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:24,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-11-06 22:02:24,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920904374] [2020-11-06 22:02:24,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531960538] [2020-11-06 22:02:24,535 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 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 [2020-11-06 22:02:24,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:02:24,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:02:24,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 85 conjunts are in the unsatisfiable core [2020-11-06 22:02:24,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:02:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 61 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-11-06 22:02:25,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:02:25,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16] total 35 [2020-11-06 22:02:25,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289869598] [2020-11-06 22:02:25,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-06 22:02:25,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:25,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-06 22:02:25,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1097, Unknown=0, NotChecked=0, Total=1190 [2020-11-06 22:02:25,368 INFO L87 Difference]: Start difference. First operand 41 states and 54 transitions. Second operand 35 states. [2020-11-06 22:02:27,161 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-11-06 22:02:27,367 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-11-06 22:02:27,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:27,521 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2020-11-06 22:02:27,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-06 22:02:27,522 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 60 [2020-11-06 22:02:27,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:27,524 INFO L225 Difference]: With dead ends: 49 [2020-11-06 22:02:27,524 INFO L226 Difference]: Without dead ends: 44 [2020-11-06 22:02:27,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=236, Invalid=2116, Unknown=0, NotChecked=0, Total=2352 [2020-11-06 22:02:27,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-06 22:02:27,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-11-06 22:02:27,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-06 22:02:27,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2020-11-06 22:02:27,536 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 60 [2020-11-06 22:02:27,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:27,536 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2020-11-06 22:02:27,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-06 22:02:27,536 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2020-11-06 22:02:27,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-06 22:02:27,537 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:27,538 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:02:27,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:02:27,754 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:27,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:27,755 INFO L82 PathProgramCache]: Analyzing trace with hash -477367206, now seen corresponding path program 9 times [2020-11-06 22:02:27,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:27,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902048855] [2020-11-06 22:02:27,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:27,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:27,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:27,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:02:27,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:27,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:27,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:27,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-06 22:02:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:28,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:28,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:28,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:28,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:28,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:28,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 22 proven. 83 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-11-06 22:02:28,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902048855] [2020-11-06 22:02:28,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165319968] [2020-11-06 22:02:28,631 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 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 [2020-11-06 22:02:28,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-06 22:02:28,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:02:28,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 93 conjunts are in the unsatisfiable core [2020-11-06 22:02:28,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:02:29,992 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 32 proven. 80 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-11-06 22:02:29,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:02:29,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2020-11-06 22:02:29,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089877886] [2020-11-06 22:02:29,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-11-06 22:02:29,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:29,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-11-06 22:02:29,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1937, Unknown=0, NotChecked=0, Total=2070 [2020-11-06 22:02:29,995 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 46 states. [2020-11-06 22:02:32,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:32,966 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2020-11-06 22:02:32,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-06 22:02:32,966 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 67 [2020-11-06 22:02:32,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:32,968 INFO L225 Difference]: With dead ends: 52 [2020-11-06 22:02:32,969 INFO L226 Difference]: Without dead ends: 47 [2020-11-06 22:02:32,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=357, Invalid=3675, Unknown=0, NotChecked=0, Total=4032 [2020-11-06 22:02:32,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-06 22:02:32,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-11-06 22:02:32,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-06 22:02:32,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2020-11-06 22:02:32,995 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 67 [2020-11-06 22:02:32,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:32,995 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2020-11-06 22:02:32,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-11-06 22:02:32,995 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2020-11-06 22:02:32,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-11-06 22:02:32,996 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:32,996 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:02:33,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:02:33,198 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:33,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:33,199 INFO L82 PathProgramCache]: Analyzing trace with hash -180759683, now seen corresponding path program 10 times [2020-11-06 22:02:33,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:33,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916608342] [2020-11-06 22:02:33,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:33,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:33,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:02:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:33,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:33,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:33,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-06 22:02:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:33,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:33,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:33,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:33,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:34,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:34,145 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-11-06 22:02:34,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916608342] [2020-11-06 22:02:34,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514428246] [2020-11-06 22:02:34,145 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 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 [2020-11-06 22:02:34,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:02:34,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:02:34,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 109 conjunts are in the unsatisfiable core [2020-11-06 22:02:34,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:02:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 5 proven. 108 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-11-06 22:02:35,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:02:35,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 20] total 43 [2020-11-06 22:02:35,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728407711] [2020-11-06 22:02:35,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-06 22:02:35,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:35,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-06 22:02:35,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1693, Unknown=0, NotChecked=0, Total=1806 [2020-11-06 22:02:35,403 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand 43 states. [2020-11-06 22:02:38,477 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-11-06 22:02:38,698 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-11-06 22:02:38,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:38,781 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2020-11-06 22:02:38,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-06 22:02:38,782 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 74 [2020-11-06 22:02:38,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:38,784 INFO L225 Difference]: With dead ends: 52 [2020-11-06 22:02:38,784 INFO L226 Difference]: Without dead ends: 47 [2020-11-06 22:02:38,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=308, Invalid=3352, Unknown=0, NotChecked=0, Total=3660 [2020-11-06 22:02:38,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-06 22:02:38,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2020-11-06 22:02:38,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-06 22:02:38,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2020-11-06 22:02:38,811 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 74 [2020-11-06 22:02:38,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:38,811 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2020-11-06 22:02:38,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-06 22:02:38,811 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2020-11-06 22:02:38,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-06 22:02:38,815 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:38,816 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:02:39,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-06 22:02:39,017 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:39,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:39,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1567101537, now seen corresponding path program 11 times [2020-11-06 22:02:39,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:39,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812793727] [2020-11-06 22:02:39,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:39,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:39,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:02:39,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:39,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:39,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:39,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:39,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:39,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-06 22:02:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:39,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:39,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:39,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:39,745 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 14 proven. 70 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-11-06 22:02:39,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812793727] [2020-11-06 22:02:39,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794786002] [2020-11-06 22:02:39,746 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 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 [2020-11-06 22:02:39,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-06 22:02:39,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:02:39,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 85 conjunts are in the unsatisfiable core [2020-11-06 22:02:39,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:02:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 62 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-11-06 22:02:40,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:02:40,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16] total 35 [2020-11-06 22:02:40,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040023267] [2020-11-06 22:02:40,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-06 22:02:40,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:40,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-06 22:02:40,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1097, Unknown=0, NotChecked=0, Total=1190 [2020-11-06 22:02:40,527 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand 35 states. [2020-11-06 22:02:42,802 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-11-06 22:02:43,015 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-11-06 22:02:43,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:43,086 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2020-11-06 22:02:43,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-06 22:02:43,087 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 60 [2020-11-06 22:02:43,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:43,088 INFO L225 Difference]: With dead ends: 54 [2020-11-06 22:02:43,089 INFO L226 Difference]: Without dead ends: 47 [2020-11-06 22:02:43,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=252, Invalid=2298, Unknown=0, NotChecked=0, Total=2550 [2020-11-06 22:02:43,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-06 22:02:43,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-11-06 22:02:43,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-06 22:02:43,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2020-11-06 22:02:43,099 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 60 [2020-11-06 22:02:43,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:43,099 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2020-11-06 22:02:43,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-06 22:02:43,099 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2020-11-06 22:02:43,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-11-06 22:02:43,100 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:43,101 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:02:43,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-06 22:02:43,315 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:43,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:43,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1309349651, now seen corresponding path program 12 times [2020-11-06 22:02:43,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:43,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167078044] [2020-11-06 22:02:43,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:43,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:43,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:02:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:43,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:43,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:43,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:43,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-06 22:02:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:43,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:44,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:44,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:44,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:44,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-11-06 22:02:44,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167078044] [2020-11-06 22:02:44,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501129756] [2020-11-06 22:02:44,349 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 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 [2020-11-06 22:02:44,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-06 22:02:44,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:02:44,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 109 conjunts are in the unsatisfiable core [2020-11-06 22:02:44,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:02:45,454 INFO L721 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-06 22:02:45,538 INFO L721 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-06 22:02:45,630 INFO L721 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-06 22:02:45,782 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 4 proven. 106 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-11-06 22:02:45,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:02:45,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 18] total 41 [2020-11-06 22:02:45,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720134089] [2020-11-06 22:02:45,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-06 22:02:45,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:45,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-06 22:02:45,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1531, Unknown=0, NotChecked=0, Total=1640 [2020-11-06 22:02:45,787 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 41 states. [2020-11-06 22:02:48,321 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-11-06 22:02:48,499 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-11-06 22:02:48,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:48,501 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2020-11-06 22:02:48,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-06 22:02:48,502 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 74 [2020-11-06 22:02:48,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:48,503 INFO L225 Difference]: With dead ends: 52 [2020-11-06 22:02:48,503 INFO L226 Difference]: Without dead ends: 47 [2020-11-06 22:02:48,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=280, Invalid=2912, Unknown=0, NotChecked=0, Total=3192 [2020-11-06 22:02:48,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-06 22:02:48,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-11-06 22:02:48,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-06 22:02:48,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2020-11-06 22:02:48,513 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 74 [2020-11-06 22:02:48,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:48,513 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2020-11-06 22:02:48,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-06 22:02:48,513 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2020-11-06 22:02:48,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-06 22:02:48,514 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:48,514 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:02:48,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-06 22:02:48,729 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:48,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:48,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1011390440, now seen corresponding path program 13 times [2020-11-06 22:02:48,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:48,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466871405] [2020-11-06 22:02:48,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:48,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:48,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:02:48,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:48,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:48,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:49,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:49,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-06 22:02:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:49,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:49,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:49,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:49,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:49,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-11-06 22:02:49,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466871405] [2020-11-06 22:02:49,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395147178] [2020-11-06 22:02:49,875 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 [2020-11-06 22:02:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:49,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 121 conjunts are in the unsatisfiable core [2020-11-06 22:02:49,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:02:51,225 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 5 proven. 134 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-11-06 22:02:51,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:02:51,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 20] total 45 [2020-11-06 22:02:51,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308358853] [2020-11-06 22:02:51,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-06 22:02:51,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:51,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-06 22:02:51,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1861, Unknown=0, NotChecked=0, Total=1980 [2020-11-06 22:02:51,228 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand 45 states. [2020-11-06 22:02:54,476 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:02:54,671 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:02:54,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:02:54,851 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2020-11-06 22:02:54,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-06 22:02:54,858 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 81 [2020-11-06 22:02:54,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:02:54,859 INFO L225 Difference]: With dead ends: 52 [2020-11-06 22:02:54,859 INFO L226 Difference]: Without dead ends: 47 [2020-11-06 22:02:54,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=316, Invalid=3590, Unknown=0, NotChecked=0, Total=3906 [2020-11-06 22:02:54,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-06 22:02:54,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2020-11-06 22:02:54,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-06 22:02:54,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2020-11-06 22:02:54,868 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 81 [2020-11-06 22:02:54,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:02:54,869 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2020-11-06 22:02:54,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-06 22:02:54,869 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2020-11-06 22:02:54,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-11-06 22:02:54,870 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:02:54,870 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:02:55,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:02:55,084 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:02:55,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:02:55,084 INFO L82 PathProgramCache]: Analyzing trace with hash -109109741, now seen corresponding path program 14 times [2020-11-06 22:02:55,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:02:55,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518748478] [2020-11-06 22:02:55,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:02:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:55,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:02:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:55,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:02:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:55,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:55,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-06 22:02:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:55,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:55,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:55,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:55,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:55,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:55,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:55,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:02:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:02:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 26 proven. 107 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-11-06 22:02:56,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518748478] [2020-11-06 22:02:56,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011381654] [2020-11-06 22:02:56,066 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 [2020-11-06 22:02:56,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:02:56,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:02:56,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 105 conjunts are in the unsatisfiable core [2020-11-06 22:02:56,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:02:57,750 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 37 proven. 104 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-11-06 22:02:57,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:02:57,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 50 [2020-11-06 22:02:57,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246199364] [2020-11-06 22:02:57,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-11-06 22:02:57,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:02:57,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-11-06 22:02:57,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2020-11-06 22:02:57,753 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand 50 states. [2020-11-06 22:03:01,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:03:01,718 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2020-11-06 22:03:01,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-06 22:03:01,720 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 74 [2020-11-06 22:03:01,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:03:01,721 INFO L225 Difference]: With dead ends: 55 [2020-11-06 22:03:01,721 INFO L226 Difference]: Without dead ends: 50 [2020-11-06 22:03:01,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=397, Invalid=4433, Unknown=0, NotChecked=0, Total=4830 [2020-11-06 22:03:01,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-06 22:03:01,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-11-06 22:03:01,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-06 22:03:01,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2020-11-06 22:03:01,732 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 74 [2020-11-06 22:03:01,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:03:01,732 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2020-11-06 22:03:01,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-11-06 22:03:01,732 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2020-11-06 22:03:01,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-06 22:03:01,733 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:03:01,734 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:03:01,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-06 22:03:01,949 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:03:01,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:03:01,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1964081552, now seen corresponding path program 15 times [2020-11-06 22:03:01,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:03:01,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028933165] [2020-11-06 22:03:01,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:03:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:02,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:03:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:02,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:03:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:02,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:02,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:02,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-06 22:03:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:02,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:02,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:02,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:02,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:02,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:02,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:03,071 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-11-06 22:03:03,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028933165] [2020-11-06 22:03:03,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405397410] [2020-11-06 22:03:03,072 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 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 [2020-11-06 22:03:03,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-11-06 22:03:03,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:03:03,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 120 conjunts are in the unsatisfiable core [2020-11-06 22:03:03,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:03:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 18 proven. 142 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-11-06 22:03:04,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:03:04,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 49 [2020-11-06 22:03:04,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597604175] [2020-11-06 22:03:04,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-11-06 22:03:04,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:03:04,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-11-06 22:03:04,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2217, Unknown=0, NotChecked=0, Total=2352 [2020-11-06 22:03:04,902 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand 49 states. [2020-11-06 22:03:08,932 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-11-06 22:03:09,188 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-11-06 22:03:09,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:03:09,337 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2020-11-06 22:03:09,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-06 22:03:09,339 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 81 [2020-11-06 22:03:09,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:03:09,340 INFO L225 Difference]: With dead ends: 57 [2020-11-06 22:03:09,340 INFO L226 Difference]: Without dead ends: 52 [2020-11-06 22:03:09,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=373, Invalid=4319, Unknown=0, NotChecked=0, Total=4692 [2020-11-06 22:03:09,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-06 22:03:09,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2020-11-06 22:03:09,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-06 22:03:09,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2020-11-06 22:03:09,350 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 81 [2020-11-06 22:03:09,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:03:09,350 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2020-11-06 22:03:09,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-11-06 22:03:09,351 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2020-11-06 22:03:09,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-11-06 22:03:09,352 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:03:09,352 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:03:09,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-06 22:03:09,567 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:03:09,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:03:09,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1816396091, now seen corresponding path program 16 times [2020-11-06 22:03:09,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:03:09,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528531803] [2020-11-06 22:03:09,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:03:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:09,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:03:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:09,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:03:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:09,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:09,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:09,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:10,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-06 22:03:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:10,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:10,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:10,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:10,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:10,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:10,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:10,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:10,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:10,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:10,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:10,917 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-11-06 22:03:10,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528531803] [2020-11-06 22:03:10,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466209411] [2020-11-06 22:03:10,917 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 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 [2020-11-06 22:03:10,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:03:10,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:03:11,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 133 conjunts are in the unsatisfiable core [2020-11-06 22:03:11,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:03:12,561 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 6 proven. 165 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-11-06 22:03:12,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:03:12,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 22] total 49 [2020-11-06 22:03:12,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731363412] [2020-11-06 22:03:12,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-11-06 22:03:12,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:03:12,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-11-06 22:03:12,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2223, Unknown=0, NotChecked=0, Total=2352 [2020-11-06 22:03:12,565 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand 49 states. [2020-11-06 22:03:13,853 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:03:16,804 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:03:17,007 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:03:17,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:03:17,056 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2020-11-06 22:03:17,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-06 22:03:17,057 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 88 [2020-11-06 22:03:17,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:03:17,059 INFO L225 Difference]: With dead ends: 55 [2020-11-06 22:03:17,059 INFO L226 Difference]: Without dead ends: 50 [2020-11-06 22:03:17,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=352, Invalid=4340, Unknown=0, NotChecked=0, Total=4692 [2020-11-06 22:03:17,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-06 22:03:17,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2020-11-06 22:03:17,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-06 22:03:17,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 60 transitions. [2020-11-06 22:03:17,069 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 60 transitions. Word has length 88 [2020-11-06 22:03:17,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:03:17,071 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 60 transitions. [2020-11-06 22:03:17,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-11-06 22:03:17,071 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 60 transitions. [2020-11-06 22:03:17,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-06 22:03:17,072 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:03:17,072 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:03:17,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-06 22:03:17,286 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:03:17,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:03:17,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1559527034, now seen corresponding path program 17 times [2020-11-06 22:03:17,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:03:17,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140728387] [2020-11-06 22:03:17,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:03:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:17,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:03:17,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:17,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:03:17,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:17,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:17,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:17,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:17,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:17,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:17,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-11-06 22:03:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:17,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:18,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:18,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-11-06 22:03:18,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140728387] [2020-11-06 22:03:18,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711540890] [2020-11-06 22:03:18,138 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 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 [2020-11-06 22:03:18,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-06 22:03:18,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:03:18,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 96 conjunts are in the unsatisfiable core [2020-11-06 22:03:18,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:03:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 14 proven. 87 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-11-06 22:03:19,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:03:19,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 41 [2020-11-06 22:03:19,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456153956] [2020-11-06 22:03:19,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-06 22:03:19,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:03:19,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-06 22:03:19,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2020-11-06 22:03:19,487 INFO L87 Difference]: Start difference. First operand 45 states and 60 transitions. Second operand 41 states. [2020-11-06 22:03:22,601 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-11-06 22:03:22,795 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-11-06 22:03:22,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:03:22,796 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2020-11-06 22:03:22,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-06 22:03:22,797 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 67 [2020-11-06 22:03:22,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:03:22,798 INFO L225 Difference]: With dead ends: 57 [2020-11-06 22:03:22,799 INFO L226 Difference]: Without dead ends: 50 [2020-11-06 22:03:22,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=313, Invalid=3109, Unknown=0, NotChecked=0, Total=3422 [2020-11-06 22:03:22,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-06 22:03:22,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-11-06 22:03:22,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-06 22:03:22,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 65 transitions. [2020-11-06 22:03:22,807 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 65 transitions. Word has length 67 [2020-11-06 22:03:22,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:03:22,807 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 65 transitions. [2020-11-06 22:03:22,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-06 22:03:22,807 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 65 transitions. [2020-11-06 22:03:22,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-06 22:03:22,808 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:03:22,808 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:03:23,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:03:23,023 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:03:23,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:03:23,024 INFO L82 PathProgramCache]: Analyzing trace with hash -964969634, now seen corresponding path program 18 times [2020-11-06 22:03:23,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:03:23,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347254619] [2020-11-06 22:03:23,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:03:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:23,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:03:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:23,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:03:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:23,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:23,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:23,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:23,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:23,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:23,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-11-06 22:03:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:23,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:23,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:23,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:24,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:24,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:24,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:24,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-11-06 22:03:24,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347254619] [2020-11-06 22:03:24,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76462493] [2020-11-06 22:03:24,703 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 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 [2020-11-06 22:03:24,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-11-06 22:03:24,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:03:24,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 144 conjunts are in the unsatisfiable core [2020-11-06 22:03:24,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:03:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 22 proven. 203 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2020-11-06 22:03:26,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:03:26,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 26] total 53 [2020-11-06 22:03:26,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285642456] [2020-11-06 22:03:27,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-11-06 22:03:27,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:03:27,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-11-06 22:03:27,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2609, Unknown=0, NotChecked=0, Total=2756 [2020-11-06 22:03:27,002 INFO L87 Difference]: Start difference. First operand 47 states and 65 transitions. Second operand 53 states. [2020-11-06 22:03:31,225 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-11-06 22:03:31,490 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-11-06 22:03:31,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:03:31,900 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2020-11-06 22:03:31,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-06 22:03:31,902 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 95 [2020-11-06 22:03:31,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:03:31,903 INFO L225 Difference]: With dead ends: 57 [2020-11-06 22:03:31,904 INFO L226 Difference]: Without dead ends: 50 [2020-11-06 22:03:31,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=405, Invalid=5145, Unknown=0, NotChecked=0, Total=5550 [2020-11-06 22:03:31,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-06 22:03:31,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2020-11-06 22:03:31,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-06 22:03:31,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 60 transitions. [2020-11-06 22:03:31,912 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 60 transitions. Word has length 95 [2020-11-06 22:03:31,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:03:31,912 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 60 transitions. [2020-11-06 22:03:31,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-11-06 22:03:31,913 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 60 transitions. [2020-11-06 22:03:31,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-06 22:03:31,913 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:03:31,914 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:03:32,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:03:32,129 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:03:32,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:03:32,130 INFO L82 PathProgramCache]: Analyzing trace with hash 2061391784, now seen corresponding path program 19 times [2020-11-06 22:03:32,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:03:32,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554933585] [2020-11-06 22:03:32,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:03:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:32,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:03:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:32,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:03:32,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:32,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:32,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-06 22:03:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:32,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:32,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:32,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:32,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:32,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:33,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:33,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:33,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:33,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 30 proven. 134 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-11-06 22:03:33,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554933585] [2020-11-06 22:03:33,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204195994] [2020-11-06 22:03:33,565 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 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 [2020-11-06 22:03:33,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:33,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 117 conjunts are in the unsatisfiable core [2020-11-06 22:03:33,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:03:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 42 proven. 131 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-11-06 22:03:35,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:03:35,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 54 [2020-11-06 22:03:35,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205290358] [2020-11-06 22:03:35,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-11-06 22:03:35,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:03:35,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-11-06 22:03:35,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2709, Unknown=0, NotChecked=0, Total=2862 [2020-11-06 22:03:35,737 INFO L87 Difference]: Start difference. First operand 45 states and 60 transitions. Second operand 54 states. [2020-11-06 22:03:40,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:03:40,672 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-11-06 22:03:40,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-06 22:03:40,673 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 81 [2020-11-06 22:03:40,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:03:40,675 INFO L225 Difference]: With dead ends: 58 [2020-11-06 22:03:40,675 INFO L226 Difference]: Without dead ends: 53 [2020-11-06 22:03:40,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=437, Invalid=5263, Unknown=0, NotChecked=0, Total=5700 [2020-11-06 22:03:40,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-06 22:03:40,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2020-11-06 22:03:40,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-06 22:03:40,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 69 transitions. [2020-11-06 22:03:40,684 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 69 transitions. Word has length 81 [2020-11-06 22:03:40,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:03:40,684 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 69 transitions. [2020-11-06 22:03:40,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-11-06 22:03:40,685 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 69 transitions. [2020-11-06 22:03:40,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-11-06 22:03:40,685 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:03:40,686 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:03:40,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-06 22:03:40,897 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:03:40,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:03:40,898 INFO L82 PathProgramCache]: Analyzing trace with hash 72973707, now seen corresponding path program 20 times [2020-11-06 22:03:40,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:03:40,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988330069] [2020-11-06 22:03:40,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:03:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:41,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:03:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:41,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:03:41,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:41,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:41,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:41,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-06 22:03:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:41,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:41,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:41,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:41,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:41,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:41,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:42,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:42,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:42,286 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-11-06 22:03:42,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988330069] [2020-11-06 22:03:42,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958057119] [2020-11-06 22:03:42,286 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 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 [2020-11-06 22:03:42,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:03:42,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:03:42,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 133 conjunts are in the unsatisfiable core [2020-11-06 22:03:42,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:03:44,236 INFO L721 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-06 22:03:44,287 INFO L721 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-06 22:03:44,391 INFO L721 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-06 22:03:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 7 proven. 167 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2020-11-06 22:03:44,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:03:44,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 24] total 51 [2020-11-06 22:03:44,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080051789] [2020-11-06 22:03:44,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-11-06 22:03:44,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:03:44,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-11-06 22:03:44,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2417, Unknown=0, NotChecked=0, Total=2550 [2020-11-06 22:03:44,600 INFO L87 Difference]: Start difference. First operand 50 states and 69 transitions. Second operand 51 states. [2020-11-06 22:03:49,389 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-11-06 22:03:49,663 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-11-06 22:03:49,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:03:49,894 INFO L93 Difference]: Finished difference Result 60 states and 80 transitions. [2020-11-06 22:03:49,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-06 22:03:49,899 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 88 [2020-11-06 22:03:49,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:03:49,900 INFO L225 Difference]: With dead ends: 60 [2020-11-06 22:03:49,901 INFO L226 Difference]: Without dead ends: 55 [2020-11-06 22:03:49,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=380, Invalid=4876, Unknown=0, NotChecked=0, Total=5256 [2020-11-06 22:03:49,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-06 22:03:49,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2020-11-06 22:03:49,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-06 22:03:49,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 69 transitions. [2020-11-06 22:03:49,910 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 69 transitions. Word has length 88 [2020-11-06 22:03:49,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:03:49,911 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 69 transitions. [2020-11-06 22:03:49,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-11-06 22:03:49,911 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 69 transitions. [2020-11-06 22:03:49,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-06 22:03:49,912 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:03:49,912 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:03:50,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-06 22:03:50,128 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:03:50,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:03:50,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1727441590, now seen corresponding path program 21 times [2020-11-06 22:03:50,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:03:50,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340237419] [2020-11-06 22:03:50,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:03:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:50,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:03:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:50,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:03:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:50,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:50,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:50,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:50,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-06 22:03:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:50,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:50,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:51,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:51,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:51,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:51,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:51,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:51,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:51,777 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-11-06 22:03:51,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340237419] [2020-11-06 22:03:51,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428611576] [2020-11-06 22:03:51,777 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 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 [2020-11-06 22:03:51,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-11-06 22:03:51,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:03:51,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 145 conjunts are in the unsatisfiable core [2020-11-06 22:03:51,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:03:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 15 proven. 192 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-11-06 22:03:53,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:03:53,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 24] total 53 [2020-11-06 22:03:53,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172843406] [2020-11-06 22:03:53,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-11-06 22:03:53,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:03:53,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-11-06 22:03:53,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2617, Unknown=0, NotChecked=0, Total=2756 [2020-11-06 22:03:53,788 INFO L87 Difference]: Start difference. First operand 50 states and 69 transitions. Second operand 53 states. [2020-11-06 22:03:58,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:03:58,624 INFO L93 Difference]: Finished difference Result 60 states and 80 transitions. [2020-11-06 22:03:58,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-06 22:03:58,625 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 95 [2020-11-06 22:03:58,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:03:58,626 INFO L225 Difference]: With dead ends: 60 [2020-11-06 22:03:58,626 INFO L226 Difference]: Without dead ends: 55 [2020-11-06 22:03:58,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=388, Invalid=5162, Unknown=0, NotChecked=0, Total=5550 [2020-11-06 22:03:58,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-06 22:03:58,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2020-11-06 22:03:58,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-06 22:03:58,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 69 transitions. [2020-11-06 22:03:58,636 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 69 transitions. Word has length 95 [2020-11-06 22:03:58,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:03:58,636 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 69 transitions. [2020-11-06 22:03:58,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-11-06 22:03:58,636 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 69 transitions. [2020-11-06 22:03:58,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-11-06 22:03:58,637 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:03:58,637 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:03:58,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:03:58,852 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:03:58,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:03:58,852 INFO L82 PathProgramCache]: Analyzing trace with hash -505462787, now seen corresponding path program 22 times [2020-11-06 22:03:58,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:03:58,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136166626] [2020-11-06 22:03:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:03:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:58,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:03:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:58,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:03:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:59,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:59,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:59,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:59,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:59,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-11-06 22:03:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:59,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:59,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:03:59,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:03:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:00,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:00,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:00,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:00,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:00,685 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-11-06 22:04:00,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136166626] [2020-11-06 22:04:00,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363334376] [2020-11-06 22:04:00,685 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 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 [2020-11-06 22:04:00,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:04:00,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:04:00,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 157 conjunts are in the unsatisfiable core [2020-11-06 22:04:00,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:04:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 7 proven. 234 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2020-11-06 22:04:02,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:04:02,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 24] total 55 [2020-11-06 22:04:02,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645192793] [2020-11-06 22:04:02,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-11-06 22:04:02,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:04:02,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-11-06 22:04:02,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2825, Unknown=0, NotChecked=0, Total=2970 [2020-11-06 22:04:02,949 INFO L87 Difference]: Start difference. First operand 50 states and 69 transitions. Second operand 55 states. [2020-11-06 22:04:07,371 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:04:08,224 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:04:08,452 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:04:08,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:04:08,637 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2020-11-06 22:04:08,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-06 22:04:08,638 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 102 [2020-11-06 22:04:08,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:04:08,641 INFO L225 Difference]: With dead ends: 58 [2020-11-06 22:04:08,641 INFO L226 Difference]: Without dead ends: 53 [2020-11-06 22:04:08,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=396, Invalid=5456, Unknown=0, NotChecked=0, Total=5852 [2020-11-06 22:04:08,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-06 22:04:08,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-11-06 22:04:08,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-06 22:04:08,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-11-06 22:04:08,649 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 102 [2020-11-06 22:04:08,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:04:08,649 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-11-06 22:04:08,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-11-06 22:04:08,650 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-11-06 22:04:08,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-06 22:04:08,650 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:04:08,650 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:04:08,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-06 22:04:08,866 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:04:08,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:04:08,866 INFO L82 PathProgramCache]: Analyzing trace with hash 249209640, now seen corresponding path program 23 times [2020-11-06 22:04:08,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:04:08,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031938840] [2020-11-06 22:04:08,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:04:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:08,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:04:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:08,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:04:09,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:09,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:09,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:09,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:09,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:09,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:09,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-11-06 22:04:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:09,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:09,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:09,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:10,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:10,208 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 26 proven. 148 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-11-06 22:04:10,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031938840] [2020-11-06 22:04:10,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472894730] [2020-11-06 22:04:10,208 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 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 [2020-11-06 22:04:10,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-06 22:04:10,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:04:10,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 121 conjunts are in the unsatisfiable core [2020-11-06 22:04:10,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:04:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 3 proven. 136 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-11-06 22:04:11,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:04:11,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 20] total 45 [2020-11-06 22:04:11,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963559685] [2020-11-06 22:04:11,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-06 22:04:11,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:04:11,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-06 22:04:11,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1861, Unknown=0, NotChecked=0, Total=1980 [2020-11-06 22:04:11,802 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 45 states. [2020-11-06 22:04:15,193 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:04:15,454 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:04:16,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:04:16,137 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2020-11-06 22:04:16,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-06 22:04:16,139 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 81 [2020-11-06 22:04:16,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:04:16,143 INFO L225 Difference]: With dead ends: 60 [2020-11-06 22:04:16,143 INFO L226 Difference]: Without dead ends: 53 [2020-11-06 22:04:16,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=332, Invalid=3828, Unknown=0, NotChecked=0, Total=4160 [2020-11-06 22:04:16,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-06 22:04:16,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2020-11-06 22:04:16,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-06 22:04:16,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 70 transitions. [2020-11-06 22:04:16,154 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 70 transitions. Word has length 81 [2020-11-06 22:04:16,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:04:16,155 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 70 transitions. [2020-11-06 22:04:16,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-06 22:04:16,155 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 70 transitions. [2020-11-06 22:04:16,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-11-06 22:04:16,157 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:04:16,157 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:04:16,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:04:16,371 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:04:16,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:04:16,371 INFO L82 PathProgramCache]: Analyzing trace with hash 657810039, now seen corresponding path program 24 times [2020-11-06 22:04:16,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:04:16,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19127496] [2020-11-06 22:04:16,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:04:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:16,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:04:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:16,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:04:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:16,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:16,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:16,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:16,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:16,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:17,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:17,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:17,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-11-06 22:04:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:17,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:17,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:17,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:17,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:18,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:18,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:18,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-11-06 22:04:18,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19127496] [2020-11-06 22:04:18,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972405601] [2020-11-06 22:04:18,573 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 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 [2020-11-06 22:04:18,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-11-06 22:04:18,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:04:18,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 157 conjunts are in the unsatisfiable core [2020-11-06 22:04:18,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:04:20,781 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 6 proven. 232 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2020-11-06 22:04:20,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:04:20,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 22] total 53 [2020-11-06 22:04:20,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866456939] [2020-11-06 22:04:20,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-11-06 22:04:20,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:04:20,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-11-06 22:04:20,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2615, Unknown=0, NotChecked=0, Total=2756 [2020-11-06 22:04:20,783 INFO L87 Difference]: Start difference. First operand 50 states and 70 transitions. Second operand 53 states. [2020-11-06 22:04:25,482 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-11-06 22:04:25,712 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-11-06 22:04:25,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:04:25,713 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-11-06 22:04:25,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-06 22:04:25,714 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 102 [2020-11-06 22:04:25,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:04:25,715 INFO L225 Difference]: With dead ends: 58 [2020-11-06 22:04:25,715 INFO L226 Difference]: Without dead ends: 53 [2020-11-06 22:04:25,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=368, Invalid=4888, Unknown=0, NotChecked=0, Total=5256 [2020-11-06 22:04:25,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-06 22:04:25,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2020-11-06 22:04:25,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-06 22:04:25,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 69 transitions. [2020-11-06 22:04:25,722 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 69 transitions. Word has length 102 [2020-11-06 22:04:25,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:04:25,723 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 69 transitions. [2020-11-06 22:04:25,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-11-06 22:04:25,723 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 69 transitions. [2020-11-06 22:04:25,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-11-06 22:04:25,724 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:04:25,724 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:04:25,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-06 22:04:25,926 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:04:25,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:04:25,927 INFO L82 PathProgramCache]: Analyzing trace with hash -129426748, now seen corresponding path program 25 times [2020-11-06 22:04:25,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:04:25,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299828326] [2020-11-06 22:04:25,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:04:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:26,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:04:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:26,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:04:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:26,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:26,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:26,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:26,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:26,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:26,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-11-06 22:04:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:26,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:27,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:27,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:27,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:27,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:27,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:27,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:28,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:28,213 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-11-06 22:04:28,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299828326] [2020-11-06 22:04:28,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657426651] [2020-11-06 22:04:28,215 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 [2020-11-06 22:04:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:28,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 169 conjunts are in the unsatisfiable core [2020-11-06 22:04:28,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:04:30,600 INFO L721 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-06 22:04:30,670 INFO L721 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-06 22:04:30,779 INFO L721 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-06 22:04:30,888 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 7 proven. 272 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2020-11-06 22:04:30,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:04:30,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 24] total 57 [2020-11-06 22:04:30,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569035160] [2020-11-06 22:04:30,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-11-06 22:04:30,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:04:30,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-11-06 22:04:30,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3041, Unknown=0, NotChecked=0, Total=3192 [2020-11-06 22:04:30,890 INFO L87 Difference]: Start difference. First operand 50 states and 69 transitions. Second operand 57 states. [2020-11-06 22:04:34,149 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:04:35,408 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:04:36,117 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:04:36,421 WARN L194 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:04:36,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:04:36,664 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2020-11-06 22:04:36,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-06 22:04:36,665 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 109 [2020-11-06 22:04:36,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:04:36,666 INFO L225 Difference]: With dead ends: 58 [2020-11-06 22:04:36,666 INFO L226 Difference]: Without dead ends: 53 [2020-11-06 22:04:36,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=404, Invalid=5758, Unknown=0, NotChecked=0, Total=6162 [2020-11-06 22:04:36,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-06 22:04:36,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-11-06 22:04:36,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-06 22:04:36,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-11-06 22:04:36,674 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 109 [2020-11-06 22:04:36,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:04:36,674 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-11-06 22:04:36,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-11-06 22:04:36,674 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-11-06 22:04:36,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-11-06 22:04:36,675 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:04:36,675 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:04:36,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-06 22:04:36,882 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:04:36,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:04:36,882 INFO L82 PathProgramCache]: Analyzing trace with hash -2046760891, now seen corresponding path program 26 times [2020-11-06 22:04:36,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:04:36,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669407943] [2020-11-06 22:04:36,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:04:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:37,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:04:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:37,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:04:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:37,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:37,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-06 22:04:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:37,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:37,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:37,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:37,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:37,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:37,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:38,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:38,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:38,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 34 proven. 164 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2020-11-06 22:04:38,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669407943] [2020-11-06 22:04:38,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698222719] [2020-11-06 22:04:38,497 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 [2020-11-06 22:04:38,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:04:38,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:04:38,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 129 conjunts are in the unsatisfiable core [2020-11-06 22:04:38,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:04:41,258 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 47 proven. 161 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-11-06 22:04:41,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:04:41,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 58 [2020-11-06 22:04:41,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095902501] [2020-11-06 22:04:41,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-11-06 22:04:41,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:04:41,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-11-06 22:04:41,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3143, Unknown=0, NotChecked=0, Total=3306 [2020-11-06 22:04:41,260 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 58 states. [2020-11-06 22:04:41,866 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-11-06 22:04:42,924 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:04:43,294 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:04:44,002 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:04:44,231 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:04:45,152 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:04:45,611 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:04:45,848 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:04:47,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:04:47,049 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2020-11-06 22:04:47,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-06 22:04:47,051 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 88 [2020-11-06 22:04:47,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:04:47,052 INFO L225 Difference]: With dead ends: 61 [2020-11-06 22:04:47,052 INFO L226 Difference]: Without dead ends: 56 [2020-11-06 22:04:47,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=477, Invalid=6165, Unknown=0, NotChecked=0, Total=6642 [2020-11-06 22:04:47,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-06 22:04:47,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-11-06 22:04:47,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-06 22:04:47,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 74 transitions. [2020-11-06 22:04:47,060 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 74 transitions. Word has length 88 [2020-11-06 22:04:47,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:04:47,061 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 74 transitions. [2020-11-06 22:04:47,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-11-06 22:04:47,061 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 74 transitions. [2020-11-06 22:04:47,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-06 22:04:47,062 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:04:47,062 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:04:47,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-06 22:04:47,268 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:04:47,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:04:47,268 INFO L82 PathProgramCache]: Analyzing trace with hash 340585730, now seen corresponding path program 27 times [2020-11-06 22:04:47,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:04:47,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461926636] [2020-11-06 22:04:47,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:04:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:47,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:04:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:47,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:04:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:47,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:47,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:47,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-06 22:04:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:47,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:47,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:48,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:48,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:48,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:48,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:48,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:48,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:48,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:48,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:49,081 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-11-06 22:04:49,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461926636] [2020-11-06 22:04:49,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705393931] [2020-11-06 22:04:49,082 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 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 [2020-11-06 22:04:49,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-11-06 22:04:49,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:04:49,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 144 conjunts are in the unsatisfiable core [2020-11-06 22:04:49,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:04:51,826 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 22 proven. 209 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-11-06 22:04:51,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:04:51,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 29] total 56 [2020-11-06 22:04:51,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583959540] [2020-11-06 22:04:51,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-11-06 22:04:51,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:04:51,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-11-06 22:04:51,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2931, Unknown=0, NotChecked=0, Total=3080 [2020-11-06 22:04:51,828 INFO L87 Difference]: Start difference. First operand 53 states and 74 transitions. Second operand 56 states. [2020-11-06 22:04:53,567 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:04:54,042 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:04:54,373 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:04:54,740 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:04:55,464 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:04:55,787 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:04:55,988 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:04:56,328 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:04:56,530 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:04:56,865 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:04:57,060 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:04:57,948 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-11-06 22:04:58,256 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-11-06 22:04:58,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:04:58,619 INFO L93 Difference]: Finished difference Result 63 states and 85 transitions. [2020-11-06 22:04:58,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-06 22:04:58,621 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 95 [2020-11-06 22:04:58,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:04:58,622 INFO L225 Difference]: With dead ends: 63 [2020-11-06 22:04:58,622 INFO L226 Difference]: Without dead ends: 58 [2020-11-06 22:04:58,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=424, Invalid=5896, Unknown=0, NotChecked=0, Total=6320 [2020-11-06 22:04:58,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-06 22:04:58,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-11-06 22:04:58,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-06 22:04:58,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 74 transitions. [2020-11-06 22:04:58,631 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 74 transitions. Word has length 95 [2020-11-06 22:04:58,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:04:58,631 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 74 transitions. [2020-11-06 22:04:58,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-11-06 22:04:58,631 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 74 transitions. [2020-11-06 22:04:58,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-11-06 22:04:58,632 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:04:58,632 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:04:58,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-06 22:04:58,846 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:04:58,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:04:58,846 INFO L82 PathProgramCache]: Analyzing trace with hash -20600457, now seen corresponding path program 28 times [2020-11-06 22:04:58,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:04:58,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852607519] [2020-11-06 22:04:58,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:04:58,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:58,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:04:58,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:59,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:04:59,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:59,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:59,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:59,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:59,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-06 22:04:59,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:59,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:59,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:04:59,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:04:59,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:00,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:00,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:00,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:00,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:00,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:00,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:00,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-11-06 22:05:00,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852607519] [2020-11-06 22:05:00,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685408272] [2020-11-06 22:05:00,947 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 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 [2020-11-06 22:05:01,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:05:01,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:05:01,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 157 conjunts are in the unsatisfiable core [2020-11-06 22:05:01,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:05:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 8 proven. 236 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-11-06 22:05:03,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:05:03,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 26] total 57 [2020-11-06 22:05:03,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332173680] [2020-11-06 22:05:03,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-11-06 22:05:03,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:05:03,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-11-06 22:05:03,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=3043, Unknown=0, NotChecked=0, Total=3192 [2020-11-06 22:05:03,751 INFO L87 Difference]: Start difference. First operand 53 states and 74 transitions. Second operand 57 states. [2020-11-06 22:05:04,510 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-11-06 22:05:04,979 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-11-06 22:05:05,455 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:05:05,747 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:06,135 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:06,423 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:06,707 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:07,082 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:07,539 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:08,098 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:08,396 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:08,670 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:08,952 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:09,232 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:10,601 WARN L194 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-11-06 22:05:10,870 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-11-06 22:05:11,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:05:11,344 INFO L93 Difference]: Finished difference Result 63 states and 85 transitions. [2020-11-06 22:05:11,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-06 22:05:11,347 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 102 [2020-11-06 22:05:11,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:05:11,348 INFO L225 Difference]: With dead ends: 63 [2020-11-06 22:05:11,348 INFO L226 Difference]: Without dead ends: 58 [2020-11-06 22:05:11,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=424, Invalid=6056, Unknown=0, NotChecked=0, Total=6480 [2020-11-06 22:05:11,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-06 22:05:11,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-11-06 22:05:11,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-06 22:05:11,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 74 transitions. [2020-11-06 22:05:11,357 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 74 transitions. Word has length 102 [2020-11-06 22:05:11,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:05:11,357 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 74 transitions. [2020-11-06 22:05:11,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-11-06 22:05:11,357 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 74 transitions. [2020-11-06 22:05:11,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-11-06 22:05:11,358 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:05:11,358 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:05:11,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:05:11,574 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:05:11,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:05:11,574 INFO L82 PathProgramCache]: Analyzing trace with hash -848370096, now seen corresponding path program 29 times [2020-11-06 22:05:11,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:05:11,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943827264] [2020-11-06 22:05:11,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:05:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:11,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:05:11,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:11,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:05:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:11,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:11,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:11,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:12,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:12,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:12,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-11-06 22:05:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:12,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:12,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:12,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:12,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:13,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:13,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:13,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:13,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:13,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:13,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-11-06 22:05:13,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943827264] [2020-11-06 22:05:13,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169924261] [2020-11-06 22:05:13,958 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 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 [2020-11-06 22:05:14,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-11-06 22:05:14,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:05:14,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 169 conjunts are in the unsatisfiable core [2020-11-06 22:05:14,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:05:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 8 proven. 274 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2020-11-06 22:05:16,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:05:16,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 26] total 59 [2020-11-06 22:05:16,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778050606] [2020-11-06 22:05:16,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-11-06 22:05:16,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:05:16,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-11-06 22:05:16,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=3267, Unknown=0, NotChecked=0, Total=3422 [2020-11-06 22:05:16,827 INFO L87 Difference]: Start difference. First operand 53 states and 74 transitions. Second operand 59 states. [2020-11-06 22:05:17,538 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-11-06 22:05:18,016 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-11-06 22:05:18,239 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:05:18,576 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:05:18,830 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:19,206 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:19,414 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:19,755 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:19,958 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:20,381 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:20,727 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:21,105 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:21,314 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:21,647 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:21,858 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:22,216 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:22,427 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:23,535 WARN L194 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-11-06 22:05:23,788 WARN L194 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-11-06 22:05:24,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:05:24,015 INFO L93 Difference]: Finished difference Result 63 states and 85 transitions. [2020-11-06 22:05:24,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-06 22:05:24,017 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 109 [2020-11-06 22:05:24,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:05:24,018 INFO L225 Difference]: With dead ends: 63 [2020-11-06 22:05:24,018 INFO L226 Difference]: Without dead ends: 58 [2020-11-06 22:05:24,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=432, Invalid=6374, Unknown=0, NotChecked=0, Total=6806 [2020-11-06 22:05:24,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-06 22:05:24,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-11-06 22:05:24,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-06 22:05:24,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 74 transitions. [2020-11-06 22:05:24,027 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 74 transitions. Word has length 109 [2020-11-06 22:05:24,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:05:24,028 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 74 transitions. [2020-11-06 22:05:24,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-11-06 22:05:24,028 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 74 transitions. [2020-11-06 22:05:24,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-06 22:05:24,029 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:05:24,029 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:05:24,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:05:24,243 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:05:24,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:05:24,244 INFO L82 PathProgramCache]: Analyzing trace with hash -551178839, now seen corresponding path program 30 times [2020-11-06 22:05:24,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:05:24,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937560155] [2020-11-06 22:05:24,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:05:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:24,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:05:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:24,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:05:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:24,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:24,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:24,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:24,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:25,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:25,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-11-06 22:05:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:25,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:25,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:25,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:25,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:25,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:26,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:26,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:26,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:26,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-11-06 22:05:27,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937560155] [2020-11-06 22:05:27,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819872899] [2020-11-06 22:05:27,026 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:05:27,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2020-11-06 22:05:27,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:05:27,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 181 conjunts are in the unsatisfiable core [2020-11-06 22:05:27,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:05:30,194 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 8 proven. 315 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2020-11-06 22:05:30,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:05:30,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 26] total 61 [2020-11-06 22:05:30,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842843535] [2020-11-06 22:05:30,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-11-06 22:05:30,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:05:30,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-11-06 22:05:30,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=3499, Unknown=0, NotChecked=0, Total=3660 [2020-11-06 22:05:30,197 INFO L87 Difference]: Start difference. First operand 53 states and 74 transitions. Second operand 61 states. [2020-11-06 22:05:31,007 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-11-06 22:05:31,520 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-11-06 22:05:31,744 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:05:32,067 WARN L194 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:05:32,473 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:32,884 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:33,196 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:33,494 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:33,806 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:34,113 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:34,414 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:34,715 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:35,115 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:35,631 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:35,938 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:36,236 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:36,559 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:37,512 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-11-06 22:05:37,862 WARN L194 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-11-06 22:05:38,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:05:38,394 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2020-11-06 22:05:38,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-06 22:05:38,396 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 116 [2020-11-06 22:05:38,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:05:38,398 INFO L225 Difference]: With dead ends: 61 [2020-11-06 22:05:38,398 INFO L226 Difference]: Without dead ends: 56 [2020-11-06 22:05:38,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=440, Invalid=6700, Unknown=0, NotChecked=0, Total=7140 [2020-11-06 22:05:38,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-06 22:05:38,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-11-06 22:05:38,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-06 22:05:38,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2020-11-06 22:05:38,407 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 116 [2020-11-06 22:05:38,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:05:38,407 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2020-11-06 22:05:38,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-11-06 22:05:38,407 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2020-11-06 22:05:38,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-06 22:05:38,408 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:05:38,408 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:05:38,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:05:38,612 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:05:38,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:05:38,612 INFO L82 PathProgramCache]: Analyzing trace with hash -767072696, now seen corresponding path program 31 times [2020-11-06 22:05:38,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:05:38,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771509125] [2020-11-06 22:05:38,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:05:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:38,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:05:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:38,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:05:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:38,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:38,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:38,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:39,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:39,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:39,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:39,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:39,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-11-06 22:05:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:39,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:39,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:40,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:40,167 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 26 proven. 148 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-11-06 22:05:40,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771509125] [2020-11-06 22:05:40,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373029301] [2020-11-06 22:05:40,167 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:05:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:40,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 121 conjunts are in the unsatisfiable core [2020-11-06 22:05:40,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:05:42,188 INFO L721 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-06 22:05:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-11-06 22:05:42,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:05:42,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 22] total 47 [2020-11-06 22:05:42,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436635957] [2020-11-06 22:05:42,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-11-06 22:05:42,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:05:42,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-11-06 22:05:42,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=2039, Unknown=0, NotChecked=0, Total=2162 [2020-11-06 22:05:42,236 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand 47 states. [2020-11-06 22:05:42,910 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-11-06 22:05:43,307 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-11-06 22:05:43,500 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:05:43,754 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:05:44,013 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:44,343 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:44,601 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:44,846 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:45,100 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:45,348 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:45,604 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:45,852 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:46,118 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:47,533 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-11-06 22:05:47,856 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-11-06 22:05:48,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:05:48,110 INFO L93 Difference]: Finished difference Result 63 states and 90 transitions. [2020-11-06 22:05:48,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-06 22:05:48,112 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 81 [2020-11-06 22:05:48,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:05:48,113 INFO L225 Difference]: With dead ends: 63 [2020-11-06 22:05:48,113 INFO L226 Difference]: Without dead ends: 56 [2020-11-06 22:05:48,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=360, Invalid=4332, Unknown=0, NotChecked=0, Total=4692 [2020-11-06 22:05:48,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-06 22:05:48,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-11-06 22:05:48,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-06 22:05:48,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 75 transitions. [2020-11-06 22:05:48,121 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 75 transitions. Word has length 81 [2020-11-06 22:05:48,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:05:48,122 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 75 transitions. [2020-11-06 22:05:48,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-11-06 22:05:48,122 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 75 transitions. [2020-11-06 22:05:48,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-06 22:05:48,123 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:05:48,123 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:05:48,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-11-06 22:05:48,337 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:05:48,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:05:48,337 INFO L82 PathProgramCache]: Analyzing trace with hash -234203793, now seen corresponding path program 32 times [2020-11-06 22:05:48,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:05:48,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156486582] [2020-11-06 22:05:48,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:05:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:48,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:05:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:48,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:05:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:48,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:48,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:48,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:49,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:49,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:49,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:49,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-11-06 22:05:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:49,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:50,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:50,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:50,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:50,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:50,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:50,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:50,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:51,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:05:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:05:51,327 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-11-06 22:05:51,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156486582] [2020-11-06 22:05:51,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065539382] [2020-11-06 22:05:51,328 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:05:51,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:05:51,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:05:51,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 181 conjunts are in the unsatisfiable core [2020-11-06 22:05:51,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:05:54,340 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 7 proven. 313 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-11-06 22:05:54,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:05:54,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 24] total 59 [2020-11-06 22:05:54,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546663311] [2020-11-06 22:05:54,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-11-06 22:05:54,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:05:54,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-11-06 22:05:54,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=3265, Unknown=0, NotChecked=0, Total=3422 [2020-11-06 22:05:54,342 INFO L87 Difference]: Start difference. First operand 53 states and 75 transitions. Second operand 59 states. [2020-11-06 22:05:55,152 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-11-06 22:05:55,664 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-11-06 22:05:55,888 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:05:56,175 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:05:56,474 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:56,876 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:57,180 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:57,471 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:57,773 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:58,063 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:58,364 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:58,652 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:58,957 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:05:59,258 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:05:59,672 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:06:00,905 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-11-06 22:06:01,287 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-11-06 22:06:01,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:06:01,690 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2020-11-06 22:06:01,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-06 22:06:01,694 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2020-11-06 22:06:01,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:06:01,695 INFO L225 Difference]: With dead ends: 61 [2020-11-06 22:06:01,695 INFO L226 Difference]: Without dead ends: 56 [2020-11-06 22:06:01,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=412, Invalid=6068, Unknown=0, NotChecked=0, Total=6480 [2020-11-06 22:06:01,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-06 22:06:01,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-11-06 22:06:01,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-06 22:06:01,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 74 transitions. [2020-11-06 22:06:01,703 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 74 transitions. Word has length 116 [2020-11-06 22:06:01,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:06:01,703 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 74 transitions. [2020-11-06 22:06:01,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-11-06 22:06:01,704 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 74 transitions. [2020-11-06 22:06:01,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-11-06 22:06:01,705 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:06:01,705 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:06:01,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:06:01,920 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:06:01,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:06:01,920 INFO L82 PathProgramCache]: Analyzing trace with hash 30944414, now seen corresponding path program 33 times [2020-11-06 22:06:01,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:06:01,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053347432] [2020-11-06 22:06:01,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:06:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:02,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:06:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:02,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:06:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:02,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:02,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:02,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:02,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:02,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:02,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:02,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:03,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-11-06 22:06:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:03,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:03,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:03,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:03,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:03,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:03,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:04,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:04,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:04,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:04,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:04,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:05,117 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-11-06 22:06:05,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053347432] [2020-11-06 22:06:05,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646364716] [2020-11-06 22:06:05,118 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:06:05,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2020-11-06 22:06:05,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:06:05,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 193 conjunts are in the unsatisfiable core [2020-11-06 22:06:05,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:06:08,835 INFO L721 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-06 22:06:08,987 INFO L721 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-06 22:06:09,229 INFO L721 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-06 22:06:09,549 INFO L721 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-06 22:06:10,026 INFO L721 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-06 22:06:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 8 proven. 359 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2020-11-06 22:06:10,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:06:10,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 26] total 63 [2020-11-06 22:06:10,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511461753] [2020-11-06 22:06:10,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-11-06 22:06:10,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:06:10,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-11-06 22:06:10,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3739, Unknown=0, NotChecked=0, Total=3906 [2020-11-06 22:06:10,364 INFO L87 Difference]: Start difference. First operand 53 states and 74 transitions. Second operand 63 states. [2020-11-06 22:06:11,468 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-11-06 22:06:12,070 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-11-06 22:06:12,338 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:06:12,659 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:06:13,003 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:06:13,477 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:06:13,827 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:06:14,169 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:06:14,515 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:06:14,848 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:06:15,203 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:06:15,530 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:06:15,877 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:06:16,215 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:06:16,698 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:06:17,290 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:06:17,640 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:06:19,080 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-11-06 22:06:19,400 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-11-06 22:06:19,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:06:19,811 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2020-11-06 22:06:19,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-06 22:06:19,814 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 123 [2020-11-06 22:06:19,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:06:19,815 INFO L225 Difference]: With dead ends: 61 [2020-11-06 22:06:19,815 INFO L226 Difference]: Without dead ends: 56 [2020-11-06 22:06:19,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=448, Invalid=7034, Unknown=0, NotChecked=0, Total=7482 [2020-11-06 22:06:19,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-06 22:06:19,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-11-06 22:06:19,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-06 22:06:19,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2020-11-06 22:06:19,823 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 123 [2020-11-06 22:06:19,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:06:19,824 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2020-11-06 22:06:19,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-11-06 22:06:19,824 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2020-11-06 22:06:19,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-06 22:06:19,825 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:06:19,825 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:06:20,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-11-06 22:06:20,038 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:06:20,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:06:20,038 INFO L82 PathProgramCache]: Analyzing trace with hash 247965686, now seen corresponding path program 34 times [2020-11-06 22:06:20,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:06:20,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938340060] [2020-11-06 22:06:20,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:06:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:20,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:06:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:20,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:06:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:20,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:20,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-06 22:06:20,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:20,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:20,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:20,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:20,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:20,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:20,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:21,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:21,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:21,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:21,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:22,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 38 proven. 197 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2020-11-06 22:06:22,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938340060] [2020-11-06 22:06:22,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653308145] [2020-11-06 22:06:22,255 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:06:22,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:06:22,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:06:22,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 141 conjunts are in the unsatisfiable core [2020-11-06 22:06:22,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:06:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 52 proven. 194 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-11-06 22:06:26,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:06:26,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 62 [2020-11-06 22:06:26,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108669191] [2020-11-06 22:06:26,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-11-06 22:06:26,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:06:26,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-11-06 22:06:26,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3609, Unknown=0, NotChecked=0, Total=3782 [2020-11-06 22:06:26,340 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand 62 states. [2020-11-06 22:06:27,380 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-11-06 22:06:27,904 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-11-06 22:06:28,142 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:06:28,453 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:06:28,873 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:06:29,392 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:06:29,708 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:06:30,033 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:06:30,354 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:06:30,659 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:06:30,979 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:06:31,280 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:06:31,610 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:06:31,920 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:06:32,241 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:06:32,538 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:06:32,853 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:06:33,166 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:06:33,500 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:06:35,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:06:35,112 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-11-06 22:06:35,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-06 22:06:35,114 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 95 [2020-11-06 22:06:35,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:06:35,115 INFO L225 Difference]: With dead ends: 64 [2020-11-06 22:06:35,115 INFO L226 Difference]: Without dead ends: 59 [2020-11-06 22:06:35,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=517, Invalid=7139, Unknown=0, NotChecked=0, Total=7656 [2020-11-06 22:06:35,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-06 22:06:35,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2020-11-06 22:06:35,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-06 22:06:35,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 79 transitions. [2020-11-06 22:06:35,124 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 79 transitions. Word has length 95 [2020-11-06 22:06:35,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:06:35,125 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 79 transitions. [2020-11-06 22:06:35,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-11-06 22:06:35,125 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 79 transitions. [2020-11-06 22:06:35,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-11-06 22:06:35,127 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:06:35,127 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:06:35,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:06:35,341 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:06:35,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:06:35,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1223509145, now seen corresponding path program 35 times [2020-11-06 22:06:35,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:06:35,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149256146] [2020-11-06 22:06:35,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:06:35,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:35,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:06:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:35,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:06:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:35,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:35,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:35,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-06 22:06:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:36,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:36,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:36,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:36,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:36,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:36,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:36,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:37,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:37,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:37,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:37,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-11-06 22:06:37,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149256146] [2020-11-06 22:06:37,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312849232] [2020-11-06 22:06:37,781 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:06:37,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-11-06 22:06:37,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:06:37,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 157 conjunts are in the unsatisfiable core [2020-11-06 22:06:37,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:06:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 19 proven. 229 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-11-06 22:06:41,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:06:41,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 28] total 59 [2020-11-06 22:06:41,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124123731] [2020-11-06 22:06:41,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-11-06 22:06:41,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:06:41,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-11-06 22:06:41,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=3269, Unknown=0, NotChecked=0, Total=3422 [2020-11-06 22:06:41,271 INFO L87 Difference]: Start difference. First operand 56 states and 79 transitions. Second operand 59 states. [2020-11-06 22:06:42,355 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-11-06 22:06:42,898 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-11-06 22:06:43,141 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-11-06 22:06:43,450 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-11-06 22:06:43,779 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:06:44,244 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:06:44,675 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:06:45,228 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:06:45,558 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:06:45,877 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:06:46,200 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:06:46,516 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:06:46,848 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:06:47,187 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:06:47,545 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:06:47,880 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:06:48,218 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:06:48,546 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:06:48,874 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:06:50,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:06:50,767 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2020-11-06 22:06:50,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-06 22:06:50,770 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 102 [2020-11-06 22:06:50,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:06:50,771 INFO L225 Difference]: With dead ends: 66 [2020-11-06 22:06:50,771 INFO L226 Difference]: Without dead ends: 61 [2020-11-06 22:06:50,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=452, Invalid=6688, Unknown=0, NotChecked=0, Total=7140 [2020-11-06 22:06:50,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-06 22:06:50,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2020-11-06 22:06:50,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-06 22:06:50,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 79 transitions. [2020-11-06 22:06:50,781 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 79 transitions. Word has length 102 [2020-11-06 22:06:50,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:06:50,781 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 79 transitions. [2020-11-06 22:06:50,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-11-06 22:06:50,781 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 79 transitions. [2020-11-06 22:06:50,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-11-06 22:06:50,782 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:06:50,782 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:06:50,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-06 22:06:50,999 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:06:50,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:06:50,999 INFO L82 PathProgramCache]: Analyzing trace with hash -28145020, now seen corresponding path program 36 times [2020-11-06 22:06:51,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:06:51,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882693556] [2020-11-06 22:06:51,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:06:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:51,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:06:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:51,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:06:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:51,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:51,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:51,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:51,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:51,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-06 22:06:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:51,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:52,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:52,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:52,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:52,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:52,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:52,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:53,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:53,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:53,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:06:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:06:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-11-06 22:06:53,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882693556] [2020-11-06 22:06:53,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563115633] [2020-11-06 22:06:53,900 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:06:54,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-11-06 22:06:54,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:06:54,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 169 conjunts are in the unsatisfiable core [2020-11-06 22:06:54,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:06:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 9 proven. 276 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2020-11-06 22:06:57,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:06:57,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 28] total 61 [2020-11-06 22:06:57,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937924739] [2020-11-06 22:06:57,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-11-06 22:06:57,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:06:57,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-11-06 22:06:57,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=3501, Unknown=0, NotChecked=0, Total=3660 [2020-11-06 22:06:57,950 INFO L87 Difference]: Start difference. First operand 56 states and 79 transitions. Second operand 61 states. [2020-11-06 22:06:58,919 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-11-06 22:06:59,512 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-11-06 22:06:59,771 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:07:00,190 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:07:00,527 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:07:01,026 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:07:01,300 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:07:01,840 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:07:02,291 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:07:02,806 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:07:03,083 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:07:03,525 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:07:03,794 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:07:04,234 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:07:04,507 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:07:04,948 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:07:05,210 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:07:05,650 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:07:05,914 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:07:07,567 WARN L194 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:07:07,984 WARN L194 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:07:08,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:07:08,079 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2020-11-06 22:07:08,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-06 22:07:08,082 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 109 [2020-11-06 22:07:08,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:07:08,083 INFO L225 Difference]: With dead ends: 66 [2020-11-06 22:07:08,083 INFO L226 Difference]: Without dead ends: 61 [2020-11-06 22:07:08,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=460, Invalid=7022, Unknown=0, NotChecked=0, Total=7482 [2020-11-06 22:07:08,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-06 22:07:08,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2020-11-06 22:07:08,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-06 22:07:08,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 79 transitions. [2020-11-06 22:07:08,091 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 79 transitions. Word has length 109 [2020-11-06 22:07:08,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:07:08,091 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 79 transitions. [2020-11-06 22:07:08,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-11-06 22:07:08,092 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 79 transitions. [2020-11-06 22:07:08,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-06 22:07:08,093 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:07:08,093 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:07:08,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-06 22:07:08,309 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:07:08,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:07:08,309 INFO L82 PathProgramCache]: Analyzing trace with hash -471017589, now seen corresponding path program 37 times [2020-11-06 22:07:08,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:07:08,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751864608] [2020-11-06 22:07:08,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:07:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:08,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:07:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:08,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:07:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:08,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:08,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:08,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:09,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:09,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-11-06 22:07:09,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:09,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:09,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:09,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:10,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:10,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:10,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:10,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:11,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:11,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:11,537 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-11-06 22:07:11,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751864608] [2020-11-06 22:07:11,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766346277] [2020-11-06 22:07:11,537 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:07:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:11,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 181 conjunts are in the unsatisfiable core [2020-11-06 22:07:11,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:07:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 9 proven. 317 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2020-11-06 22:07:15,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:07:15,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 28] total 63 [2020-11-06 22:07:15,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540472318] [2020-11-06 22:07:15,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-11-06 22:07:15,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:07:15,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-11-06 22:07:15,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3741, Unknown=0, NotChecked=0, Total=3906 [2020-11-06 22:07:15,784 INFO L87 Difference]: Start difference. First operand 56 states and 79 transitions. Second operand 63 states. [2020-11-06 22:07:16,829 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-11-06 22:07:17,452 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-11-06 22:07:17,719 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:07:18,082 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:07:18,450 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:07:18,950 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:07:19,332 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:07:19,685 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:07:20,068 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:07:20,484 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:07:21,040 WARN L194 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:07:21,731 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:07:22,144 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:07:22,540 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:07:22,969 WARN L194 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:07:23,387 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:07:23,796 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:07:24,196 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:07:24,601 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:07:25,975 WARN L194 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:07:26,342 WARN L194 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:07:26,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:07:26,973 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2020-11-06 22:07:26,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-06 22:07:26,977 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 116 [2020-11-06 22:07:26,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:07:26,978 INFO L225 Difference]: With dead ends: 66 [2020-11-06 22:07:26,978 INFO L226 Difference]: Without dead ends: 61 [2020-11-06 22:07:26,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=468, Invalid=7364, Unknown=0, NotChecked=0, Total=7832 [2020-11-06 22:07:26,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-06 22:07:26,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2020-11-06 22:07:26,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-06 22:07:26,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 79 transitions. [2020-11-06 22:07:26,987 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 79 transitions. Word has length 116 [2020-11-06 22:07:26,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:07:26,988 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 79 transitions. [2020-11-06 22:07:26,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-11-06 22:07:26,988 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 79 transitions. [2020-11-06 22:07:26,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-11-06 22:07:26,989 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:07:26,989 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:07:27,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-06 22:07:27,205 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:07:27,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:07:27,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1063204334, now seen corresponding path program 38 times [2020-11-06 22:07:27,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:07:27,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101425713] [2020-11-06 22:07:27,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:07:27,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:27,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:07:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:27,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:07:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:27,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:27,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:27,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:27,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:28,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:28,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-11-06 22:07:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:28,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:28,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:28,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:29,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:29,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:29,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:29,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:29,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:30,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:30,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:30,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-11-06 22:07:31,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101425713] [2020-11-06 22:07:31,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031928861] [2020-11-06 22:07:31,156 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:07:31,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:07:31,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:07:31,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 193 conjunts are in the unsatisfiable core [2020-11-06 22:07:31,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:07:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 9 proven. 361 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2020-11-06 22:07:36,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:07:36,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 28] total 65 [2020-11-06 22:07:36,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225680822] [2020-11-06 22:07:36,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-11-06 22:07:36,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:07:36,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-11-06 22:07:36,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3989, Unknown=0, NotChecked=0, Total=4160 [2020-11-06 22:07:36,324 INFO L87 Difference]: Start difference. First operand 56 states and 79 transitions. Second operand 65 states. [2020-11-06 22:07:37,696 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-11-06 22:07:38,517 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-11-06 22:07:38,865 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:07:39,299 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:07:39,697 WARN L194 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:07:40,349 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:07:40,799 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:07:41,251 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:07:41,721 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:07:42,181 WARN L194 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:07:42,656 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:07:43,113 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:07:43,747 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:07:44,501 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:07:44,973 WARN L194 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:07:45,419 WARN L194 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:07:45,888 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:07:46,317 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:07:46,751 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:07:48,831 WARN L194 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:07:49,339 WARN L194 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:07:49,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:07:49,467 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2020-11-06 22:07:49,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-06 22:07:49,471 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 123 [2020-11-06 22:07:49,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:07:49,473 INFO L225 Difference]: With dead ends: 66 [2020-11-06 22:07:49,473 INFO L226 Difference]: Without dead ends: 61 [2020-11-06 22:07:49,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=476, Invalid=7714, Unknown=0, NotChecked=0, Total=8190 [2020-11-06 22:07:49,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-06 22:07:49,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2020-11-06 22:07:49,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-06 22:07:49,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 79 transitions. [2020-11-06 22:07:49,482 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 79 transitions. Word has length 123 [2020-11-06 22:07:49,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:07:49,483 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 79 transitions. [2020-11-06 22:07:49,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-11-06 22:07:49,483 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 79 transitions. [2020-11-06 22:07:49,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-11-06 22:07:49,484 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:07:49,484 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:07:49,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-06 22:07:49,698 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:07:49,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:07:49,698 INFO L82 PathProgramCache]: Analyzing trace with hash -800817795, now seen corresponding path program 39 times [2020-11-06 22:07:49,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:07:49,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427759374] [2020-11-06 22:07:49,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:07:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:49,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:07:49,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:49,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:07:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:50,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:50,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:50,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:50,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:50,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:50,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:51,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:51,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:51,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-11-06 22:07:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:51,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:51,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:51,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:52,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:52,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:52,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:53,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:53,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:53,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:53,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:54,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:07:54,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:07:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2020-11-06 22:07:54,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427759374] [2020-11-06 22:07:54,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137024051] [2020-11-06 22:07:54,582 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:07:54,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2020-11-06 22:07:54,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:07:54,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 205 conjunts are in the unsatisfiable core [2020-11-06 22:07:54,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:08:01,241 INFO L721 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-06 22:08:01,281 INFO L721 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-06 22:08:01,349 INFO L721 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-06 22:08:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 9 proven. 409 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2020-11-06 22:08:01,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:08:01,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 28] total 67 [2020-11-06 22:08:01,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039302175] [2020-11-06 22:08:01,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-11-06 22:08:01,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:08:01,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-11-06 22:08:01,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=4245, Unknown=0, NotChecked=0, Total=4422 [2020-11-06 22:08:01,479 INFO L87 Difference]: Start difference. First operand 56 states and 79 transitions. Second operand 67 states. [2020-11-06 22:08:02,902 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-11-06 22:08:03,717 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-11-06 22:08:04,055 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:08:04,536 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:08:05,036 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:08:05,735 WARN L194 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:08:06,169 WARN L194 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:08:06,620 WARN L194 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:08:07,108 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:08:07,601 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:08:08,112 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:08:08,614 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:08:09,125 WARN L194 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:08:09,654 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:08:10,368 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:08:11,240 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:08:11,777 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:08:12,276 WARN L194 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:08:12,738 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:08:15,258 WARN L194 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:08:15,846 WARN L194 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:08:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:08:15,849 INFO L93 Difference]: Finished difference Result 64 states and 86 transitions. [2020-11-06 22:08:15,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-06 22:08:15,849 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 130 [2020-11-06 22:08:15,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:08:15,850 INFO L225 Difference]: With dead ends: 64 [2020-11-06 22:08:15,850 INFO L226 Difference]: Without dead ends: 59 [2020-11-06 22:08:15,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=484, Invalid=8072, Unknown=0, NotChecked=0, Total=8556 [2020-11-06 22:08:15,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-06 22:08:15,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-11-06 22:08:15,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-06 22:08:15,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 75 transitions. [2020-11-06 22:08:15,859 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 75 transitions. Word has length 130 [2020-11-06 22:08:15,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:08:15,860 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 75 transitions. [2020-11-06 22:08:15,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-11-06 22:08:15,860 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 75 transitions. [2020-11-06 22:08:15,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-11-06 22:08:15,861 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:08:15,861 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:08:16,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:08:16,075 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:08:16,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:08:16,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1061747397, now seen corresponding path program 40 times [2020-11-06 22:08:16,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:08:16,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995295187] [2020-11-06 22:08:16,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:08:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:16,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:08:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:16,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:08:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:16,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:08:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:16,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:08:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:16,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:08:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:17,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:08:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:17,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:08:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:17,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:08:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:18,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:08:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:18,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-06 22:08:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:18,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:08:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:18,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:08:18,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:19,160 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 30 proven. 180 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-11-06 22:08:19,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995295187] [2020-11-06 22:08:19,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335735662] [2020-11-06 22:08:19,161 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:08:19,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:08:19,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:08:19,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 132 conjunts are in the unsatisfiable core [2020-11-06 22:08:19,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:08:23,703 INFO L721 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-06 22:08:23,762 INFO L721 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-06 22:08:23,827 INFO L721 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-06 22:08:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 19 proven. 175 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-11-06 22:08:23,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:08:23,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28] total 53 [2020-11-06 22:08:23,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733186738] [2020-11-06 22:08:23,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-11-06 22:08:23,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:08:23,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-11-06 22:08:23,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2611, Unknown=0, NotChecked=0, Total=2756 [2020-11-06 22:08:23,929 INFO L87 Difference]: Start difference. First operand 54 states and 75 transitions. Second operand 53 states. [2020-11-06 22:08:25,068 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-11-06 22:08:25,739 WARN L194 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-11-06 22:08:26,043 WARN L194 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:08:26,515 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:08:26,926 WARN L194 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:08:27,529 WARN L194 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:08:27,864 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:08:28,397 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:08:28,721 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:08:29,221 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:08:29,522 WARN L194 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:08:30,053 WARN L194 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:08:30,395 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:08:30,912 WARN L194 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:08:31,250 WARN L194 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:08:34,416 WARN L194 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-11-06 22:08:34,924 WARN L194 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-11-06 22:08:34,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:08:34,926 INFO L93 Difference]: Finished difference Result 66 states and 96 transitions. [2020-11-06 22:08:34,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-06 22:08:34,926 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 88 [2020-11-06 22:08:34,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:08:34,928 INFO L225 Difference]: With dead ends: 66 [2020-11-06 22:08:34,928 INFO L226 Difference]: Without dead ends: 59 [2020-11-06 22:08:34,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=427, Invalid=5425, Unknown=0, NotChecked=0, Total=5852 [2020-11-06 22:08:34,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-06 22:08:34,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2020-11-06 22:08:34,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-06 22:08:34,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 80 transitions. [2020-11-06 22:08:34,936 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 80 transitions. Word has length 88 [2020-11-06 22:08:34,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:08:34,937 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 80 transitions. [2020-11-06 22:08:34,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-11-06 22:08:34,937 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 80 transitions. [2020-11-06 22:08:34,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-11-06 22:08:34,938 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:08:34,938 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:08:35,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-06 22:08:35,152 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:08:35,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:08:35,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1653855451, now seen corresponding path program 41 times [2020-11-06 22:08:35,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:08:35,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643027625] [2020-11-06 22:08:35,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:08:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:35,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:08:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:35,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:08:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:35,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:08:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:35,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:08:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:35,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:08:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:36,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:08:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:36,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:08:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:36,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:08:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:37,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:08:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:37,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-06 22:08:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:37,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:08:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:38,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:08:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:38,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:08:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:38,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:08:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:39,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:08:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:39,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:08:39,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:40,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:08:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:40,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:08:40,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:08:40,783 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2020-11-06 22:08:40,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643027625] [2020-11-06 22:08:40,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947973321] [2020-11-06 22:08:40,784 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:08:40,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-11-06 22:08:40,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:08:40,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 205 conjunts are in the unsatisfiable core [2020-11-06 22:08:40,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:08:47,013 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 8 proven. 406 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2020-11-06 22:08:47,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:08:47,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 26] total 65 [2020-11-06 22:08:47,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000211543] [2020-11-06 22:08:47,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-11-06 22:08:47,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:08:47,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-11-06 22:08:47,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3987, Unknown=0, NotChecked=0, Total=4160 [2020-11-06 22:08:47,015 INFO L87 Difference]: Start difference. First operand 56 states and 80 transitions. Second operand 65 states. [2020-11-06 22:08:48,435 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-11-06 22:08:49,295 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-11-06 22:08:49,691 WARN L194 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:08:50,219 WARN L194 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:08:50,709 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:08:51,374 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:08:51,927 WARN L194 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:08:52,477 WARN L194 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:08:53,010 WARN L194 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:08:53,519 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:08:54,045 WARN L194 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:08:54,535 WARN L194 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:08:55,062 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:08:55,587 WARN L194 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:08:56,139 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:08:56,662 WARN L194 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:08:57,370 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:08:58,835 WARN L194 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-11-06 22:08:59,405 WARN L194 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-11-06 22:09:00,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:09:00,783 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-11-06 22:09:00,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-06 22:09:00,788 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 130 [2020-11-06 22:09:00,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:09:00,789 INFO L225 Difference]: With dead ends: 64 [2020-11-06 22:09:00,789 INFO L226 Difference]: Without dead ends: 59 [2020-11-06 22:09:00,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=456, Invalid=7376, Unknown=0, NotChecked=0, Total=7832 [2020-11-06 22:09:00,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-06 22:09:00,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2020-11-06 22:09:00,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-06 22:09:00,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 79 transitions. [2020-11-06 22:09:00,798 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 79 transitions. Word has length 130 [2020-11-06 22:09:00,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:09:00,799 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 79 transitions. [2020-11-06 22:09:00,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-11-06 22:09:00,799 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 79 transitions. [2020-11-06 22:09:00,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-11-06 22:09:00,800 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:09:00,800 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:09:01,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:09:01,005 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:09:01,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:09:01,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1119648096, now seen corresponding path program 42 times [2020-11-06 22:09:01,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:09:01,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473331436] [2020-11-06 22:09:01,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:09:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:01,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:09:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:01,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:09:01,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:01,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:01,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:01,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:02,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:02,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:02,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:02,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:02,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:02,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:03,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-06 22:09:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:03,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:03,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:03,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:04,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:04,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:04,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:05,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:05,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:06,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:06,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 60 proven. 486 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2020-11-06 22:09:07,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473331436] [2020-11-06 22:09:07,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438225714] [2020-11-06 22:09:07,173 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:09:07,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-11-06 22:09:07,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:09:07,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 217 conjunts are in the unsatisfiable core [2020-11-06 22:09:07,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:09:15,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 9 proven. 458 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2020-11-06 22:09:15,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:09:15,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 28] total 69 [2020-11-06 22:09:15,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336509269] [2020-11-06 22:09:15,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-11-06 22:09:15,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:09:15,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-11-06 22:09:15,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=4509, Unknown=0, NotChecked=0, Total=4692 [2020-11-06 22:09:15,103 INFO L87 Difference]: Start difference. First operand 56 states and 79 transitions. Second operand 69 states. [2020-11-06 22:09:16,855 WARN L194 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-11-06 22:09:17,891 WARN L194 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-11-06 22:09:18,331 WARN L194 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:09:18,903 WARN L194 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:09:19,502 WARN L194 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:09:20,347 WARN L194 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:09:20,947 WARN L194 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:09:21,447 WARN L194 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:09:21,974 WARN L194 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:09:22,489 WARN L194 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:09:23,055 WARN L194 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:09:23,582 WARN L194 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:09:24,138 WARN L194 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:09:24,680 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:09:25,228 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:09:25,756 WARN L194 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:09:26,496 WARN L194 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:09:27,450 WARN L194 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:09:28,006 WARN L194 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:09:30,268 WARN L194 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:09:30,822 WARN L194 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:09:31,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:09:31,758 INFO L93 Difference]: Finished difference Result 64 states and 86 transitions. [2020-11-06 22:09:31,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-06 22:09:31,764 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 137 [2020-11-06 22:09:31,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:09:31,766 INFO L225 Difference]: With dead ends: 64 [2020-11-06 22:09:31,766 INFO L226 Difference]: Without dead ends: 59 [2020-11-06 22:09:31,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1360 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=492, Invalid=8438, Unknown=0, NotChecked=0, Total=8930 [2020-11-06 22:09:31,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-06 22:09:31,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-11-06 22:09:31,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-06 22:09:31,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 75 transitions. [2020-11-06 22:09:31,773 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 75 transitions. Word has length 137 [2020-11-06 22:09:31,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:09:31,773 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 75 transitions. [2020-11-06 22:09:31,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-11-06 22:09:31,774 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 75 transitions. [2020-11-06 22:09:31,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-11-06 22:09:31,774 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:09:31,774 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:09:31,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:09:31,988 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:09:31,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:09:31,988 INFO L82 PathProgramCache]: Analyzing trace with hash -510053001, now seen corresponding path program 43 times [2020-11-06 22:09:31,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:09:31,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89104126] [2020-11-06 22:09:31,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:09:32,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:32,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:09:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:32,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:09:32,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:32,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:32,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-06 22:09:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:32,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:32,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:33,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:33,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:33,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:33,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:33,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:34,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:34,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:34,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:34,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:35,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:09:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 42 proven. 233 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-11-06 22:09:35,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89104126] [2020-11-06 22:09:35,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535483745] [2020-11-06 22:09:35,967 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:09:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:09:36,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 153 conjunts are in the unsatisfiable core [2020-11-06 22:09:36,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:09:43,192 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 57 proven. 230 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-11-06 22:09:43,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:09:43,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 66 [2020-11-06 22:09:43,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648022268] [2020-11-06 22:09:43,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-11-06 22:09:43,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:09:43,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-11-06 22:09:43,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=4107, Unknown=0, NotChecked=0, Total=4290 [2020-11-06 22:09:43,194 INFO L87 Difference]: Start difference. First operand 54 states and 75 transitions. Second operand 66 states. [2020-11-06 22:09:44,776 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-11-06 22:09:45,722 WARN L194 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-11-06 22:09:46,127 WARN L194 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:09:46,655 WARN L194 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:09:47,370 WARN L194 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:09:48,337 WARN L194 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:09:48,902 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:09:49,479 WARN L194 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:09:50,048 WARN L194 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:09:50,616 WARN L194 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:09:51,165 WARN L194 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:09:51,693 WARN L194 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:09:52,242 WARN L194 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:09:52,785 WARN L194 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:09:53,346 WARN L194 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:09:53,901 WARN L194 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:09:54,455 WARN L194 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:09:55,002 WARN L194 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:09:55,555 WARN L194 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:09:56,092 WARN L194 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:09:56,642 WARN L194 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:10:00,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:10:00,055 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-11-06 22:10:00,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-06 22:10:00,060 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 102 [2020-11-06 22:10:00,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:10:00,061 INFO L225 Difference]: With dead ends: 67 [2020-11-06 22:10:00,061 INFO L226 Difference]: Without dead ends: 62 [2020-11-06 22:10:00,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1747 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=557, Invalid=8185, Unknown=0, NotChecked=0, Total=8742 [2020-11-06 22:10:00,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-06 22:10:00,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-11-06 22:10:00,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-06 22:10:00,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 84 transitions. [2020-11-06 22:10:00,071 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 84 transitions. Word has length 102 [2020-11-06 22:10:00,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:10:00,071 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 84 transitions. [2020-11-06 22:10:00,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-11-06 22:10:00,071 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 84 transitions. [2020-11-06 22:10:00,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-11-06 22:10:00,072 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:10:00,073 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:10:00,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-11-06 22:10:00,286 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:10:00,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:10:00,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1066118004, now seen corresponding path program 44 times [2020-11-06 22:10:00,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:10:00,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025730338] [2020-11-06 22:10:00,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:10:00,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:00,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:10:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:00,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:10:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:00,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:10:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:01,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:10:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:01,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-11-06 22:10:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:01,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:10:01,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:01,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:10:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:01,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:10:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:02,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:10:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:02,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:10:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:02,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:10:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:03,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:10:03,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:03,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:10:03,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:04,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:10:04,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:04,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:10:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-11-06 22:10:04,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025730338] [2020-11-06 22:10:04,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229013854] [2020-11-06 22:10:04,742 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:10:04,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:10:04,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:10:04,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 169 conjunts are in the unsatisfiable core [2020-11-06 22:10:04,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:10:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 10 proven. 278 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2020-11-06 22:10:11,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:10:11,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 30] total 63 [2020-11-06 22:10:11,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028825410] [2020-11-06 22:10:11,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-11-06 22:10:11,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:10:11,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-11-06 22:10:11,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3743, Unknown=0, NotChecked=0, Total=3906 [2020-11-06 22:10:11,732 INFO L87 Difference]: Start difference. First operand 59 states and 84 transitions. Second operand 63 states. [2020-11-06 22:10:13,192 WARN L194 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-11-06 22:10:14,079 WARN L194 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-11-06 22:10:14,464 WARN L194 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:10:14,993 WARN L194 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:10:15,554 WARN L194 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:10:16,333 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:10:17,106 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:10:18,048 WARN L194 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:10:18,616 WARN L194 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:10:19,187 WARN L194 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:10:19,773 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:10:20,328 WARN L194 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:10:20,865 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:10:21,426 WARN L194 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:10:21,990 WARN L194 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:10:22,567 WARN L194 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:10:23,159 WARN L194 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:10:23,751 WARN L194 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:10:24,347 WARN L194 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:10:24,935 WARN L194 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:10:25,537 WARN L194 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:10:26,687 WARN L194 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-11-06 22:10:27,283 WARN L194 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-11-06 22:10:28,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:10:28,842 INFO L93 Difference]: Finished difference Result 69 states and 95 transitions. [2020-11-06 22:10:28,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-06 22:10:28,848 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 109 [2020-11-06 22:10:28,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:10:28,850 INFO L225 Difference]: With dead ends: 69 [2020-11-06 22:10:28,850 INFO L226 Difference]: Without dead ends: 64 [2020-11-06 22:10:28,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=488, Invalid=7702, Unknown=0, NotChecked=0, Total=8190 [2020-11-06 22:10:28,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-06 22:10:28,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-11-06 22:10:28,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-06 22:10:28,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 84 transitions. [2020-11-06 22:10:28,860 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 84 transitions. Word has length 109 [2020-11-06 22:10:28,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:10:28,860 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 84 transitions. [2020-11-06 22:10:28,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-11-06 22:10:28,860 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 84 transitions. [2020-11-06 22:10:28,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-06 22:10:28,861 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:10:28,861 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:10:29,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-11-06 22:10:29,076 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:10:29,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:10:29,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1420626135, now seen corresponding path program 45 times [2020-11-06 22:10:29,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:10:29,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132941004] [2020-11-06 22:10:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:10:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:29,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:10:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:29,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:10:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:29,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:10:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:29,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:10:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:30,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:10:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:30,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-06 22:10:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:30,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:10:30,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:30,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:10:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:31,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:10:31,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:31,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:10:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:32,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:10:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:32,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:10:32,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:32,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:10:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:33,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:10:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:33,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:10:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:34,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:10:34,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:10:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-11-06 22:10:34,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132941004] [2020-11-06 22:10:34,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064570414] [2020-11-06 22:10:34,832 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:10:34,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-11-06 22:10:34,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:10:34,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 180 conjunts are in the unsatisfiable core [2020-11-06 22:10:34,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:10:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 28 proven. 329 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-11-06 22:10:44,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:10:44,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 34] total 67 [2020-11-06 22:10:44,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037058718] [2020-11-06 22:10:44,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-11-06 22:10:44,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:10:44,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-11-06 22:10:44,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=4241, Unknown=0, NotChecked=0, Total=4422 [2020-11-06 22:10:44,913 INFO L87 Difference]: Start difference. First operand 59 states and 84 transitions. Second operand 67 states. [2020-11-06 22:10:46,980 WARN L194 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-11-06 22:10:48,213 WARN L194 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-11-06 22:10:48,703 WARN L194 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-11-06 22:10:49,369 WARN L194 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:10:50,052 WARN L194 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:10:51,042 WARN L194 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:10:51,727 WARN L194 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:10:52,397 WARN L194 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:10:53,213 WARN L194 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:10:54,278 WARN L194 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:10:54,944 WARN L194 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:10:55,622 WARN L194 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:10:56,323 WARN L194 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:10:57,012 WARN L194 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:10:57,715 WARN L194 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:10:58,399 WARN L194 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:10:59,095 WARN L194 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:10:59,778 WARN L194 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:11:00,488 WARN L194 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:11:01,187 WARN L194 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:11:01,903 WARN L194 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:11:04,715 WARN L194 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-11-06 22:11:05,235 WARN L194 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-11-06 22:11:06,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:11:06,011 INFO L93 Difference]: Finished difference Result 69 states and 95 transitions. [2020-11-06 22:11:06,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-06 22:11:06,017 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 116 [2020-11-06 22:11:06,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:11:06,019 INFO L225 Difference]: With dead ends: 69 [2020-11-06 22:11:06,019 INFO L226 Difference]: Without dead ends: 64 [2020-11-06 22:11:06,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=533, Invalid=8397, Unknown=0, NotChecked=0, Total=8930 [2020-11-06 22:11:06,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-06 22:11:06,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-11-06 22:11:06,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-06 22:11:06,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 84 transitions. [2020-11-06 22:11:06,027 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 84 transitions. Word has length 116 [2020-11-06 22:11:06,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:11:06,027 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 84 transitions. [2020-11-06 22:11:06,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-11-06 22:11:06,027 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 84 transitions. [2020-11-06 22:11:06,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-11-06 22:11:06,028 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:11:06,028 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:11:06,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-11-06 22:11:06,229 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:11:06,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:11:06,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1239399358, now seen corresponding path program 46 times [2020-11-06 22:11:06,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:11:06,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912661546] [2020-11-06 22:11:06,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:11:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:06,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:11:06,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:06,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:11:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:06,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:06,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:07,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:07,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:07,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:07,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-11-06 22:11:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:08,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:08,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:08,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:09,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:09,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:09,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:10,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:10,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:11,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:11,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-11-06 22:11:12,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912661546] [2020-11-06 22:11:12,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712380112] [2020-11-06 22:11:12,208 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:11:12,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:11:12,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:11:12,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 193 conjunts are in the unsatisfiable core [2020-11-06 22:11:12,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:11:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 10 proven. 363 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2020-11-06 22:11:20,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:11:20,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 30] total 67 [2020-11-06 22:11:20,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019431729] [2020-11-06 22:11:20,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-11-06 22:11:20,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:11:20,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-11-06 22:11:20,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=4247, Unknown=0, NotChecked=0, Total=4422 [2020-11-06 22:11:20,511 INFO L87 Difference]: Start difference. First operand 59 states and 84 transitions. Second operand 67 states. [2020-11-06 22:11:22,346 WARN L194 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-11-06 22:11:23,407 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-11-06 22:11:23,852 WARN L194 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:11:24,436 WARN L194 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:11:25,054 WARN L194 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:11:25,914 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:11:26,529 WARN L194 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:11:27,124 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:11:27,759 WARN L194 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:11:28,363 WARN L194 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:11:29,174 WARN L194 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:11:30,240 WARN L194 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:11:30,843 WARN L194 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:11:31,451 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:11:32,078 WARN L194 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:11:32,675 WARN L194 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:11:33,304 WARN L194 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:11:33,911 WARN L194 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:11:34,534 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:11:35,153 WARN L194 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:11:35,778 WARN L194 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:11:37,566 WARN L194 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:11:38,108 WARN L194 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:11:39,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:11:39,648 INFO L93 Difference]: Finished difference Result 69 states and 95 transitions. [2020-11-06 22:11:39,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-06 22:11:39,665 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 123 [2020-11-06 22:11:39,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:11:39,666 INFO L225 Difference]: With dead ends: 69 [2020-11-06 22:11:39,666 INFO L226 Difference]: Without dead ends: 64 [2020-11-06 22:11:39,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1568 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=504, Invalid=8426, Unknown=0, NotChecked=0, Total=8930 [2020-11-06 22:11:39,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-06 22:11:39,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-11-06 22:11:39,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-06 22:11:39,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 84 transitions. [2020-11-06 22:11:39,677 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 84 transitions. Word has length 123 [2020-11-06 22:11:39,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:11:39,678 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 84 transitions. [2020-11-06 22:11:39,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-11-06 22:11:39,678 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 84 transitions. [2020-11-06 22:11:39,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-11-06 22:11:39,679 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:11:39,679 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:11:39,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:11:39,894 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:11:39,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:11:39,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1580645339, now seen corresponding path program 47 times [2020-11-06 22:11:39,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:11:39,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45925752] [2020-11-06 22:11:39,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:11:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:40,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:11:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:40,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:11:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:40,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:40,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:40,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:40,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:41,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:41,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:41,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-11-06 22:11:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:42,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:42,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:42,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:43,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:43,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:44,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:44,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:44,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:45,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:45,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:46,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:11:46,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:11:46,670 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2020-11-06 22:11:46,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45925752] [2020-11-06 22:11:46,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734918331] [2020-11-06 22:11:46,671 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:11:46,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-11-06 22:11:46,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:11:46,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 205 conjunts are in the unsatisfiable core [2020-11-06 22:11:46,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:11:55,574 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 10 proven. 410 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2020-11-06 22:11:55,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:11:55,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 30] total 69 [2020-11-06 22:11:55,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976716789] [2020-11-06 22:11:55,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-11-06 22:11:55,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:11:55,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-11-06 22:11:55,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=4511, Unknown=0, NotChecked=0, Total=4692 [2020-11-06 22:11:55,575 INFO L87 Difference]: Start difference. First operand 59 states and 84 transitions. Second operand 69 states. [2020-11-06 22:11:57,588 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-11-06 22:11:58,758 WARN L194 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-11-06 22:11:59,233 WARN L194 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:11:59,882 WARN L194 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:12:00,553 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:12:01,524 WARN L194 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:12:02,194 WARN L194 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:12:02,862 WARN L194 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:12:03,540 WARN L194 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:12:04,201 WARN L194 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:12:04,874 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:12:05,528 WARN L194 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:12:06,410 WARN L194 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:12:07,593 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:12:08,287 WARN L194 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:12:08,956 WARN L194 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:12:09,640 WARN L194 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:12:10,318 WARN L194 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:12:11,011 WARN L194 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:12:11,703 WARN L194 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:12:12,402 WARN L194 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:12:14,423 WARN L194 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:12:15,191 WARN L194 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:12:16,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:12:16,710 INFO L93 Difference]: Finished difference Result 69 states and 95 transitions. [2020-11-06 22:12:16,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-06 22:12:16,716 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 130 [2020-11-06 22:12:16,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:12:16,718 INFO L225 Difference]: With dead ends: 69 [2020-11-06 22:12:16,718 INFO L226 Difference]: Without dead ends: 64 [2020-11-06 22:12:16,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=512, Invalid=8800, Unknown=0, NotChecked=0, Total=9312 [2020-11-06 22:12:16,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-06 22:12:16,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-11-06 22:12:16,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-06 22:12:16,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 84 transitions. [2020-11-06 22:12:16,728 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 84 transitions. Word has length 130 [2020-11-06 22:12:16,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:12:16,728 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 84 transitions. [2020-11-06 22:12:16,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-11-06 22:12:16,729 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 84 transitions. [2020-11-06 22:12:16,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-11-06 22:12:16,730 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:12:16,730 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:12:16,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-06 22:12:16,940 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:12:16,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:12:16,940 INFO L82 PathProgramCache]: Analyzing trace with hash -558798320, now seen corresponding path program 48 times [2020-11-06 22:12:16,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:12:16,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998019776] [2020-11-06 22:12:16,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:12:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:17,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:12:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:17,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:12:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:17,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:12:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:17,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:12:17,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:17,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:12:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:18,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:12:18,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:18,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:12:18,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:19,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:12:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:19,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-11-06 22:12:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:19,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:12:19,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:20,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:12:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:20,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:12:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:20,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:12:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:21,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:12:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:21,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:12:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:22,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:12:22,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:22,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:12:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:23,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:12:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:24,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:12:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 60 proven. 486 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2020-11-06 22:12:24,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998019776] [2020-11-06 22:12:24,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061745981] [2020-11-06 22:12:24,574 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:12:24,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-11-06 22:12:24,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:12:24,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 217 conjunts are in the unsatisfiable core [2020-11-06 22:12:24,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:12:34,604 INFO L721 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-06 22:12:34,629 INFO L721 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-11-06 22:12:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 10 proven. 460 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-11-06 22:12:34,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:12:34,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 30] total 71 [2020-11-06 22:12:34,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133943508] [2020-11-06 22:12:34,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-11-06 22:12:34,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:12:34,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-11-06 22:12:34,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=4783, Unknown=0, NotChecked=0, Total=4970 [2020-11-06 22:12:34,703 INFO L87 Difference]: Start difference. First operand 59 states and 84 transitions. Second operand 71 states. [2020-11-06 22:12:36,755 WARN L194 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-11-06 22:12:37,944 WARN L194 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-11-06 22:12:38,452 WARN L194 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:12:39,116 WARN L194 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:12:39,811 WARN L194 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:12:40,774 WARN L194 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:12:41,468 WARN L194 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:12:42,143 WARN L194 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:12:42,831 WARN L194 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:12:43,498 WARN L194 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:12:44,194 WARN L194 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:12:44,857 WARN L194 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:12:45,544 WARN L194 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:12:46,221 WARN L194 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:12:47,164 WARN L194 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:12:48,365 WARN L194 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:12:49,058 WARN L194 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:12:49,725 WARN L194 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:12:50,425 WARN L194 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:12:51,100 WARN L194 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:12:51,806 WARN L194 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:12:55,358 WARN L194 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:12:55,954 WARN L194 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:12:56,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:12:56,321 INFO L93 Difference]: Finished difference Result 69 states and 95 transitions. [2020-11-06 22:12:56,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-06 22:12:56,329 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 137 [2020-11-06 22:12:56,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:12:56,330 INFO L225 Difference]: With dead ends: 69 [2020-11-06 22:12:56,330 INFO L226 Difference]: Without dead ends: 64 [2020-11-06 22:12:56,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=520, Invalid=9182, Unknown=0, NotChecked=0, Total=9702 [2020-11-06 22:12:56,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-06 22:12:56,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-11-06 22:12:56,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-06 22:12:56,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 84 transitions. [2020-11-06 22:12:56,339 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 84 transitions. Word has length 137 [2020-11-06 22:12:56,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:12:56,339 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 84 transitions. [2020-11-06 22:12:56,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-11-06 22:12:56,339 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 84 transitions. [2020-11-06 22:12:56,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-11-06 22:12:56,340 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:12:56,340 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:12:56,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-06 22:12:56,554 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:12:56,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:12:56,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1127179149, now seen corresponding path program 49 times [2020-11-06 22:12:56,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:12:56,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760246273] [2020-11-06 22:12:56,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:12:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:56,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:12:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:56,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:12:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:57,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:12:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:57,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:12:57,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:57,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:12:57,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:57,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:12:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:58,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:12:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:58,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:12:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:58,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:12:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:59,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-06 22:12:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:12:59,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:12:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:00,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:13:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:00,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:13:00,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:01,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:13:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:01,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:13:01,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:02,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:13:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:02,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:13:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:03,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:13:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:04,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:13:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:04,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:13:04,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:05,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 64 proven. 542 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2020-11-06 22:13:05,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760246273] [2020-11-06 22:13:05,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234863275] [2020-11-06 22:13:05,217 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:13:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:05,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 229 conjunts are in the unsatisfiable core [2020-11-06 22:13:05,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:13:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 10 proven. 513 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2020-11-06 22:13:15,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:13:15,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 30] total 73 [2020-11-06 22:13:15,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106707683] [2020-11-06 22:13:15,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-11-06 22:13:15,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:13:15,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-11-06 22:13:15,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=5063, Unknown=0, NotChecked=0, Total=5256 [2020-11-06 22:13:15,492 INFO L87 Difference]: Start difference. First operand 59 states and 84 transitions. Second operand 73 states. [2020-11-06 22:13:17,590 WARN L194 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-11-06 22:13:18,907 WARN L194 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-11-06 22:13:19,413 WARN L194 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:13:20,304 WARN L194 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:13:20,970 WARN L194 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:13:22,065 WARN L194 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:13:22,612 WARN L194 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:13:23,499 WARN L194 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:13:24,006 WARN L194 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:13:24,897 WARN L194 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:13:25,406 WARN L194 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:13:26,277 WARN L194 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:13:26,795 WARN L194 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:13:27,713 WARN L194 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:13:28,243 WARN L194 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:13:29,422 WARN L194 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:13:30,405 WARN L194 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:13:31,492 WARN L194 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:13:32,001 WARN L194 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:13:32,870 WARN L194 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:13:33,384 WARN L194 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:13:35,557 WARN L194 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:13:36,350 WARN L194 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-11-06 22:13:37,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:13:37,741 INFO L93 Difference]: Finished difference Result 67 states and 91 transitions. [2020-11-06 22:13:37,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-06 22:13:37,748 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2020-11-06 22:13:37,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:13:37,750 INFO L225 Difference]: With dead ends: 67 [2020-11-06 22:13:37,750 INFO L226 Difference]: Without dead ends: 62 [2020-11-06 22:13:37,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=528, Invalid=9572, Unknown=0, NotChecked=0, Total=10100 [2020-11-06 22:13:37,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-06 22:13:37,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2020-11-06 22:13:37,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-06 22:13:37,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 80 transitions. [2020-11-06 22:13:37,758 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 80 transitions. Word has length 144 [2020-11-06 22:13:37,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:13:37,758 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 80 transitions. [2020-11-06 22:13:37,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-11-06 22:13:37,758 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 80 transitions. [2020-11-06 22:13:37,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-11-06 22:13:37,759 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:13:37,759 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:13:37,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:13:37,963 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:13:37,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:13:37,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1495006267, now seen corresponding path program 50 times [2020-11-06 22:13:37,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:13:37,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657548596] [2020-11-06 22:13:37,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:13:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:38,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:13:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:38,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:13:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:38,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:13:38,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:38,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:13:38,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:38,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:13:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:39,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:13:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:39,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:13:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:39,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:13:39,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:40,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:13:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:41,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:13:41,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:41,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-06 22:13:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:42,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:13:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:42,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:13:42,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:43,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:13:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:13:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 38 proven. 253 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-11-06 22:13:43,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657548596] [2020-11-06 22:13:43,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663167982] [2020-11-06 22:13:43,374 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:13:43,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:13:43,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:13:43,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 157 conjunts are in the unsatisfiable core [2020-11-06 22:13:43,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:13:50,013 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 3 proven. 241 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-11-06 22:13:50,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:13:50,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 26] total 57 [2020-11-06 22:13:50,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307026579] [2020-11-06 22:13:50,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-11-06 22:13:50,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:13:50,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-11-06 22:13:50,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=3043, Unknown=0, NotChecked=0, Total=3192 [2020-11-06 22:13:50,015 INFO L87 Difference]: Start difference. First operand 57 states and 80 transitions. Second operand 57 states. [2020-11-06 22:13:51,791 WARN L194 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-11-06 22:13:52,946 WARN L194 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-11-06 22:13:53,434 WARN L194 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:13:54,324 WARN L194 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:13:54,939 WARN L194 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:13:55,790 WARN L194 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:13:56,270 WARN L194 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:13:57,108 WARN L194 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:13:57,658 WARN L194 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:13:58,600 WARN L194 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:13:59,173 WARN L194 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:14:00,126 WARN L194 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:14:00,703 WARN L194 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:14:01,683 WARN L194 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:14:02,180 WARN L194 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:14:03,034 WARN L194 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:14:03,622 WARN L194 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:14:04,262 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-11-06 22:14:05,928 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-11-06 22:14:06,913 WARN L194 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-11-06 22:14:07,613 WARN L194 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-11-06 22:14:09,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:14:09,492 INFO L93 Difference]: Finished difference Result 69 states and 102 transitions. [2020-11-06 22:14:09,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-06 22:14:09,499 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 102 [2020-11-06 22:14:09,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:14:09,500 INFO L225 Difference]: With dead ends: 69 [2020-11-06 22:14:09,501 INFO L226 Difference]: Without dead ends: 62 [2020-11-06 22:14:09,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=440, Invalid=6366, Unknown=0, NotChecked=0, Total=6806 [2020-11-06 22:14:09,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-06 22:14:09,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-11-06 22:14:09,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-06 22:14:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 85 transitions. [2020-11-06 22:14:09,510 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 85 transitions. Word has length 102 [2020-11-06 22:14:09,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:14:09,510 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 85 transitions. [2020-11-06 22:14:09,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-11-06 22:14:09,510 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 85 transitions. [2020-11-06 22:14:09,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-11-06 22:14:09,511 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:14:09,511 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:14:09,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-11-06 22:14:09,725 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:14:09,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:14:09,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1611863663, now seen corresponding path program 51 times [2020-11-06 22:14:09,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:14:09,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335697471] [2020-11-06 22:14:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:14:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:14:10,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:14:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:14:10,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:14:10,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:14:10,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:14:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:14:10,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:14:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:14:10,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:14:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:14:10,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:14:10,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:14:11,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:14:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:14:11,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:14:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:14:11,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:14:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:14:12,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:14:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:14:13,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-06 22:14:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:14:13,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:14:13,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:14:13,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:14:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:14:14,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:14:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:14:15,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:14:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:14:15,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:14:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:14:16,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:14:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:14:16,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:14:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:14:17,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:14:17,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:14:18,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:14:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:14:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 64 proven. 542 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2020-11-06 22:14:18,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335697471] [2020-11-06 22:14:18,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803031575] [2020-11-06 22:14:18,851 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:14:18,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-11-06 22:14:18,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:14:18,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 229 conjunts are in the unsatisfiable core [2020-11-06 22:14:18,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:14:29,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 9 proven. 511 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2020-11-06 22:14:29,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:14:29,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 28] total 71 [2020-11-06 22:14:29,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391595802] [2020-11-06 22:14:29,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-11-06 22:14:29,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:14:29,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-11-06 22:14:29,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=4781, Unknown=0, NotChecked=0, Total=4970 [2020-11-06 22:14:29,534 INFO L87 Difference]: Start difference. First operand 59 states and 85 transitions. Second operand 71 states. [2020-11-06 22:14:31,108 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-11-06 22:14:32,332 WARN L194 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-11-06 22:14:32,931 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-11-06 22:14:34,363 WARN L194 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-11-06 22:14:35,192 WARN L194 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:14:36,380 WARN L194 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-11-06 22:14:37,457 WARN L194 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:14:39,102 WARN L194 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:14:39,799 WARN L194 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:14:41,380 WARN L194 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:14:42,138 WARN L194 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:14:43,466 WARN L194 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:14:44,099 WARN L194 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:14:45,251 WARN L194 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:14:45,965 WARN L194 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:14:47,366 WARN L194 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:14:48,043 WARN L194 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:14:49,590 WARN L194 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:14:50,582 WARN L194 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:14:51,680 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-11-06 22:14:52,695 WARN L194 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-11-06 22:14:53,453 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-11-06 22:14:54,463 WARN L194 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-11-06 22:15:00,893 WARN L194 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-06 22:15:02,503 WARN L194 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-11-06 22:15:03,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:15:03,442 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-11-06 22:15:03,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-06 22:15:03,452 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 144 [2020-11-06 22:15:03,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:15:03,453 INFO L225 Difference]: With dead ends: 67 [2020-11-06 22:15:03,453 INFO L226 Difference]: Without dead ends: 62 [2020-11-06 22:15:03,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 33.1s TimeCoverageRelationStatistics Valid=500, Invalid=8812, Unknown=0, NotChecked=0, Total=9312 [2020-11-06 22:15:03,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-06 22:15:03,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-11-06 22:15:03,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-06 22:15:03,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 84 transitions. [2020-11-06 22:15:03,462 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 84 transitions. Word has length 144 [2020-11-06 22:15:03,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:15:03,463 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 84 transitions. [2020-11-06 22:15:03,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-11-06 22:15:03,463 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 84 transitions. [2020-11-06 22:15:03,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-11-06 22:15:03,464 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:15:03,464 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:15:03,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:15:03,679 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:15:03,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:15:03,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1889811678, now seen corresponding path program 52 times [2020-11-06 22:15:03,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:15:03,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525468315] [2020-11-06 22:15:03,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:15:03,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:04,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:15:04,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:04,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:15:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:04,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:04,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:05,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:05,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:05,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:05,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:06,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:07,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:07,370 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-11-06 22:15:08,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:08,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-06 22:15:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:09,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:10,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:10,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:11,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:11,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:11,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:12,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:13,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:13,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:15:14,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:15:14,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat