/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:05:34,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:05:34,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:05:34,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:05:34,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:05:34,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:05:34,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:05:34,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:05:34,583 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:05:34,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:05:34,585 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:05:34,586 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:05:34,586 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:05:34,587 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:05:34,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:05:34,589 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:05:34,590 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:05:34,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:05:34,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:05:34,595 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:05:34,596 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:05:34,597 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:05:34,598 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:05:34,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:05:34,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 13:05:34,602 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 13:05:34,602 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 13:05:34,603 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 13:05:34,604 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 13:05:34,605 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 13:05:34,605 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 13:05:34,606 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 13:05:34,607 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 13:05:34,608 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 13:05:34,609 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 13:05:34,609 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 13:05:34,610 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 13:05:34,610 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 13:05:34,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:05:34,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:05:34,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:05:34,613 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:05:34,640 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:05:34,640 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:05:34,641 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:05:34,641 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:05:34,642 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:05:34,642 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:05:34,642 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:05:34,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:05:34,642 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:05:34,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:05:34,643 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:05:34,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:05:34,643 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:05:34,643 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:05:34,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:05:34,644 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:05:34,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:05:34,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:05:34,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:05:34,645 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:05:34,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:05:34,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:05:34,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:05:34,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:05:34,646 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:05:34,646 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:05:34,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:05:34,646 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:05:34,646 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:05:34,647 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:05:35,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:05:35,167 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:05:35,171 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:05:35,173 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:05:35,174 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:05:35,175 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-09-04 13:05:35,248 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e2be986e7/1884e43409094aaa8a0502e8bba9f4d5/FLAG8a62f1fdf [2020-09-04 13:05:35,781 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:05:35,782 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-09-04 13:05:35,790 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e2be986e7/1884e43409094aaa8a0502e8bba9f4d5/FLAG8a62f1fdf [2020-09-04 13:05:36,118 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e2be986e7/1884e43409094aaa8a0502e8bba9f4d5 [2020-09-04 13:05:36,133 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:05:36,135 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:05:36,137 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:05:36,137 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:05:36,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:05:36,142 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:05:36" (1/1) ... [2020-09-04 13:05:36,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bb9461a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:36, skipping insertion in model container [2020-09-04 13:05:36,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:05:36" (1/1) ... [2020-09-04 13:05:36,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:05:36,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:05:36,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:05:36,400 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:05:36,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:05:36,437 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:05:36,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:36 WrapperNode [2020-09-04 13:05:36,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:05:36,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:05:36,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:05:36,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:05:36,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:36" (1/1) ... [2020-09-04 13:05:36,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:36" (1/1) ... [2020-09-04 13:05:36,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:36" (1/1) ... [2020-09-04 13:05:36,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:36" (1/1) ... [2020-09-04 13:05:36,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:36" (1/1) ... [2020-09-04 13:05:36,550 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:36" (1/1) ... [2020-09-04 13:05:36,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:36" (1/1) ... [2020-09-04 13:05:36,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:05:36,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:05:36,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:05:36,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:05:36,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:36" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:05:36,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:05:36,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:05:36,635 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-09-04 13:05:36,635 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:05:36,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:05:36,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:05:36,636 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-09-04 13:05:36,636 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:05:36,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:05:36,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:05:36,890 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:05:36,891 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 13:05:36,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:05:36 BoogieIcfgContainer [2020-09-04 13:05:36,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:05:36,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:05:36,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:05:36,923 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:05:36,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:05:36" (1/3) ... [2020-09-04 13:05:36,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37530b2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:05:36, skipping insertion in model container [2020-09-04 13:05:36,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:36" (2/3) ... [2020-09-04 13:05:36,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37530b2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:05:36, skipping insertion in model container [2020-09-04 13:05:36,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:05:36" (3/3) ... [2020-09-04 13:05:36,935 INFO L109 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2020-09-04 13:05:36,953 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:05:36,964 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:05:36,989 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:05:37,030 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:05:37,030 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:05:37,030 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:05:37,030 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:05:37,031 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:05:37,031 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:05:37,031 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:05:37,031 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:05:37,051 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-04 13:05:37,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-04 13:05:37,059 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:05:37,061 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:05:37,061 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:05:37,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:05:37,068 INFO L82 PathProgramCache]: Analyzing trace with hash -962219036, now seen corresponding path program 1 times [2020-09-04 13:05:37,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:05:37,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910399163] [2020-09-04 13:05:37,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:05:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:37,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:05:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:37,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:05:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:37,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-04 13:05:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:05:37,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910399163] [2020-09-04 13:05:37,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565128287] [2020-09-04 13:05:37,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:05:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:37,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-04 13:05:37,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:05:37,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:05:37,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:05:37,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-04 13:05:37,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869205934] [2020-09-04 13:05:37,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 13:05:37,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:05:37,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 13:05:37,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:05:37,565 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 6 states. [2020-09-04 13:05:37,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:05:37,718 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-09-04 13:05:37,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:05:37,721 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-09-04 13:05:37,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:05:37,735 INFO L225 Difference]: With dead ends: 41 [2020-09-04 13:05:37,735 INFO L226 Difference]: Without dead ends: 25 [2020-09-04 13:05:37,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:05:37,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-04 13:05:37,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-04 13:05:37,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-04 13:05:37,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-09-04 13:05:37,803 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 23 [2020-09-04 13:05:37,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:05:37,804 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-09-04 13:05:37,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 13:05:37,804 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-09-04 13:05:37,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-04 13:05:37,807 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:05:37,808 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] [2020-09-04 13:05:38,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-09-04 13:05:38,022 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:05:38,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:05:38,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1472914703, now seen corresponding path program 1 times [2020-09-04 13:05:38,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:05:38,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889579756] [2020-09-04 13:05:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:05:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:38,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:05:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:38,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:05:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:38,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:38,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-04 13:05:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-04 13:05:38,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889579756] [2020-09-04 13:05:38,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:05:38,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:05:38,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420491005] [2020-09-04 13:05:38,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:05:38,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:05:38,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:05:38,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:05:38,179 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 5 states. [2020-09-04 13:05:38,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:05:38,256 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-09-04 13:05:38,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:05:38,257 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-09-04 13:05:38,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:05:38,258 INFO L225 Difference]: With dead ends: 29 [2020-09-04 13:05:38,259 INFO L226 Difference]: Without dead ends: 25 [2020-09-04 13:05:38,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:05:38,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-04 13:05:38,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-04 13:05:38,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-04 13:05:38,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-09-04 13:05:38,269 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2020-09-04 13:05:38,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:05:38,269 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-09-04 13:05:38,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:05:38,270 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-09-04 13:05:38,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-04 13:05:38,271 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:05:38,272 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] [2020-09-04 13:05:38,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 13:05:38,272 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:05:38,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:05:38,273 INFO L82 PathProgramCache]: Analyzing trace with hash 746268336, now seen corresponding path program 2 times [2020-09-04 13:05:38,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:05:38,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137387389] [2020-09-04 13:05:38,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:05:38,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:38,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:05:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:38,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:05:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:38,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:38,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-04 13:05:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:38,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:38,808 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 13:05:38,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137387389] [2020-09-04 13:05:38,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843248499] [2020-09-04 13:05:38,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:05:38,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:05:38,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:05:38,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 41 conjunts are in the unsatisfiable core [2020-09-04 13:05:38,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:05:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-04 13:05:39,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:05:39,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2020-09-04 13:05:39,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675440114] [2020-09-04 13:05:39,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-04 13:05:39,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:05:39,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-04 13:05:39,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-09-04 13:05:39,173 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 24 states. [2020-09-04 13:05:39,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:05:39,777 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2020-09-04 13:05:39,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 13:05:39,778 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 37 [2020-09-04 13:05:39,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:05:39,780 INFO L225 Difference]: With dead ends: 43 [2020-09-04 13:05:39,780 INFO L226 Difference]: Without dead ends: 39 [2020-09-04 13:05:39,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2020-09-04 13:05:39,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-04 13:05:39,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-09-04 13:05:39,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-04 13:05:39,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2020-09-04 13:05:39,794 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 37 [2020-09-04 13:05:39,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:05:39,795 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2020-09-04 13:05:39,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-04 13:05:39,795 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2020-09-04 13:05:39,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-04 13:05:39,797 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:05:39,798 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] [2020-09-04 13:05:40,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:05:40,013 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:05:40,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:05:40,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1882602408, now seen corresponding path program 1 times [2020-09-04 13:05:40,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:05:40,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192055660] [2020-09-04 13:05:40,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:05:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:40,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:05:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:40,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:05:40,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:40,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:40,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-04 13:05:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:40,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:40,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:05:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-04 13:05:40,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192055660] [2020-09-04 13:05:40,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150090469] [2020-09-04 13:05:40,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:05:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:40,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:05:40,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:05:40,264 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-09-04 13:05:40,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:05:40,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-09-04 13:05:40,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483708391] [2020-09-04 13:05:40,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 13:05:40,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:05:40,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 13:05:40,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:05:40,267 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 9 states. [2020-09-04 13:05:40,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:05:40,385 INFO L93 Difference]: Finished difference Result 54 states and 78 transitions. [2020-09-04 13:05:40,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:05:40,387 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-09-04 13:05:40,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:05:40,388 INFO L225 Difference]: With dead ends: 54 [2020-09-04 13:05:40,388 INFO L226 Difference]: Without dead ends: 28 [2020-09-04 13:05:40,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:05:40,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-04 13:05:40,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-04 13:05:40,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-04 13:05:40,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-09-04 13:05:40,403 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 43 [2020-09-04 13:05:40,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:05:40,404 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-09-04 13:05:40,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 13:05:40,404 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-09-04 13:05:40,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-04 13:05:40,406 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:05:40,406 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] [2020-09-04 13:05:40,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:05:40,620 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:05:40,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:05:40,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1837502139, now seen corresponding path program 3 times [2020-09-04 13:05:40,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:05:40,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893407512] [2020-09-04 13:05:40,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:05:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:40,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:05:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:40,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:05:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:40,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:40,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-04 13:05:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:40,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:40,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:41,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-04 13:05:41,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893407512] [2020-09-04 13:05:41,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118489931] [2020-09-04 13:05:41,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:05:41,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-04 13:05:41,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:05:41,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 57 conjunts are in the unsatisfiable core [2020-09-04 13:05:41,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:05:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-04 13:05:41,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:05:41,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 33 [2020-09-04 13:05:41,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591071083] [2020-09-04 13:05:41,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-04 13:05:41,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:05:41,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-04 13:05:41,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-09-04 13:05:41,775 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 33 states. [2020-09-04 13:05:42,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:05:42,491 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-09-04 13:05:42,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 13:05:42,492 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 44 [2020-09-04 13:05:42,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:05:42,494 INFO L225 Difference]: With dead ends: 39 [2020-09-04 13:05:42,494 INFO L226 Difference]: Without dead ends: 35 [2020-09-04 13:05:42,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2020-09-04 13:05:42,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-04 13:05:42,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-09-04 13:05:42,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-04 13:05:42,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-09-04 13:05:42,503 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 44 [2020-09-04 13:05:42,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:05:42,504 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-09-04 13:05:42,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-04 13:05:42,504 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-09-04 13:05:42,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-04 13:05:42,506 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:05:42,506 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] [2020-09-04 13:05:42,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:05:42,707 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:05:42,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:05:42,708 INFO L82 PathProgramCache]: Analyzing trace with hash 430867302, now seen corresponding path program 4 times [2020-09-04 13:05:42,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:05:42,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724600832] [2020-09-04 13:05:42,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:05:42,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:42,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:05:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:42,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:05:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:42,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:42,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-04 13:05:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:43,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:43,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:43,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:43,257 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 7 proven. 52 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-04 13:05:43,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724600832] [2020-09-04 13:05:43,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214746343] [2020-09-04 13:05:43,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:05:43,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:05:43,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:05:43,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 69 conjunts are in the unsatisfiable core [2020-09-04 13:05:43,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:05:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-04 13:05:44,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:05:44,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2020-09-04 13:05:44,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406706080] [2020-09-04 13:05:44,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-04 13:05:44,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:05:44,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-04 13:05:44,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2020-09-04 13:05:44,074 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 37 states. [2020-09-04 13:05:45,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:05:45,134 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-09-04 13:05:45,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 13:05:45,135 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 51 [2020-09-04 13:05:45,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:05:45,137 INFO L225 Difference]: With dead ends: 42 [2020-09-04 13:05:45,137 INFO L226 Difference]: Without dead ends: 38 [2020-09-04 13:05:45,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=207, Invalid=2049, Unknown=0, NotChecked=0, Total=2256 [2020-09-04 13:05:45,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-04 13:05:45,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-09-04 13:05:45,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-04 13:05:45,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-09-04 13:05:45,147 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 51 [2020-09-04 13:05:45,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:05:45,147 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-09-04 13:05:45,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-04 13:05:45,148 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-09-04 13:05:45,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-04 13:05:45,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:05:45,149 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] [2020-09-04 13:05:45,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-04 13:05:45,353 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:05:45,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:05:45,353 INFO L82 PathProgramCache]: Analyzing trace with hash -272057979, now seen corresponding path program 5 times [2020-09-04 13:05:45,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:05:45,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368838713] [2020-09-04 13:05:45,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:05:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:45,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:05:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:45,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:05:45,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:45,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:45,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-04 13:05:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:45,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:45,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:45,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:45,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:45,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-09-04 13:05:46,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368838713] [2020-09-04 13:05:46,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658914976] [2020-09-04 13:05:46,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:05:46,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-04 13:05:46,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:05:46,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 81 conjunts are in the unsatisfiable core [2020-09-04 13:05:46,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:05:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 27 proven. 59 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-09-04 13:05:47,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:05:47,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 41 [2020-09-04 13:05:47,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279231688] [2020-09-04 13:05:47,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-09-04 13:05:47,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:05:47,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-09-04 13:05:47,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1527, Unknown=0, NotChecked=0, Total=1640 [2020-09-04 13:05:47,059 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 41 states. [2020-09-04 13:05:48,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:05:48,515 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-09-04 13:05:48,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 13:05:48,516 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 58 [2020-09-04 13:05:48,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:05:48,518 INFO L225 Difference]: With dead ends: 45 [2020-09-04 13:05:48,518 INFO L226 Difference]: Without dead ends: 41 [2020-09-04 13:05:48,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=239, Invalid=2623, Unknown=0, NotChecked=0, Total=2862 [2020-09-04 13:05:48,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-04 13:05:48,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-09-04 13:05:48,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-04 13:05:48,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-09-04 13:05:48,530 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 58 [2020-09-04 13:05:48,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:05:48,530 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-09-04 13:05:48,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-09-04 13:05:48,531 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-09-04 13:05:48,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-04 13:05:48,532 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:05:48,532 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] [2020-09-04 13:05:48,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:05:48,737 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:05:48,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:05:48,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1872336740, now seen corresponding path program 6 times [2020-09-04 13:05:48,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:05:48,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894901851] [2020-09-04 13:05:48,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:05:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:48,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:05:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:48,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:05:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:48,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:49,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:49,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:49,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-04 13:05:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:49,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:49,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:49,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-04 13:05:49,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894901851] [2020-09-04 13:05:49,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678216181] [2020-09-04 13:05:49,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:05:49,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-04 13:05:49,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:05:49,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 72 conjunts are in the unsatisfiable core [2020-09-04 13:05:49,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:05:49,723 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 44 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-04 13:05:49,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:05:49,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 27 [2020-09-04 13:05:49,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666669378] [2020-09-04 13:05:49,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-04 13:05:49,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:05:49,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-04 13:05:49,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2020-09-04 13:05:49,725 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 27 states. [2020-09-04 13:05:50,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:05:50,413 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2020-09-04 13:05:50,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 13:05:50,413 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 51 [2020-09-04 13:05:50,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:05:50,414 INFO L225 Difference]: With dead ends: 49 [2020-09-04 13:05:50,414 INFO L226 Difference]: Without dead ends: 43 [2020-09-04 13:05:50,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 13:05:50,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-04 13:05:50,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-09-04 13:05:50,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-04 13:05:50,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2020-09-04 13:05:50,424 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 51 [2020-09-04 13:05:50,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:05:50,425 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2020-09-04 13:05:50,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-04 13:05:50,425 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2020-09-04 13:05:50,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-04 13:05:50,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:05:50,427 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] [2020-09-04 13:05:50,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:05:50,634 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:05:50,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:05:50,634 INFO L82 PathProgramCache]: Analyzing trace with hash 921134702, now seen corresponding path program 7 times [2020-09-04 13:05:50,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:05:50,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117614724] [2020-09-04 13:05:50,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:05:50,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:50,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:05:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:50,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:05:50,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:50,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:50,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:50,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:50,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-04 13:05:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:51,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:51,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:51,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:51,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:51,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-09-04 13:05:51,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117614724] [2020-09-04 13:05:51,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39110229] [2020-09-04 13:05:51,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:05:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:51,430 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 97 conjunts are in the unsatisfiable core [2020-09-04 13:05:51,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:05:52,221 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 4 proven. 83 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-09-04 13:05:52,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:05:52,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18] total 38 [2020-09-04 13:05:52,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002936912] [2020-09-04 13:05:52,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-04 13:05:52,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:05:52,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-04 13:05:52,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2020-09-04 13:05:52,224 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 38 states. [2020-09-04 13:05:53,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:05:53,611 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2020-09-04 13:05:53,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 13:05:53,612 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 65 [2020-09-04 13:05:53,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:05:53,615 INFO L225 Difference]: With dead ends: 49 [2020-09-04 13:05:53,615 INFO L226 Difference]: Without dead ends: 43 [2020-09-04 13:05:53,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=210, Invalid=2340, Unknown=0, NotChecked=0, Total=2550 [2020-09-04 13:05:53,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-04 13:05:53,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-09-04 13:05:53,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-04 13:05:53,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-09-04 13:05:53,631 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 65 [2020-09-04 13:05:53,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:05:53,632 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-09-04 13:05:53,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-04 13:05:53,633 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-09-04 13:05:53,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-04 13:05:53,635 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:05:53,635 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] [2020-09-04 13:05:53,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-09-04 13:05:53,836 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:05:53,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:05:53,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1602258660, now seen corresponding path program 8 times [2020-09-04 13:05:53,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:05:53,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613557845] [2020-09-04 13:05:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:05:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:53,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:05:53,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:53,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:05:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:54,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:54,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-04 13:05:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:54,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:54,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:54,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:54,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:54,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:54,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 11 proven. 95 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-09-04 13:05:54,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613557845] [2020-09-04 13:05:54,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608359728] [2020-09-04 13:05:54,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:05:54,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:05:54,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:05:54,794 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 93 conjunts are in the unsatisfiable core [2020-09-04 13:05:54,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:05:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 32 proven. 80 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-09-04 13:05:56,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:05:56,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 45 [2020-09-04 13:05:56,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981543793] [2020-09-04 13:05:56,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-09-04 13:05:56,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:05:56,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-09-04 13:05:56,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1857, Unknown=0, NotChecked=0, Total=1980 [2020-09-04 13:05:56,003 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 45 states. [2020-09-04 13:05:57,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:05:57,832 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2020-09-04 13:05:57,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 13:05:57,833 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 65 [2020-09-04 13:05:57,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:05:57,835 INFO L225 Difference]: With dead ends: 50 [2020-09-04 13:05:57,835 INFO L226 Difference]: Without dead ends: 46 [2020-09-04 13:05:57,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=271, Invalid=3269, Unknown=0, NotChecked=0, Total=3540 [2020-09-04 13:05:57,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-04 13:05:57,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-09-04 13:05:57,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 13:05:57,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-09-04 13:05:57,846 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 65 [2020-09-04 13:05:57,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:05:57,847 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-09-04 13:05:57,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-09-04 13:05:57,847 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-09-04 13:05:57,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-04 13:05:57,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:05:57,848 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] [2020-09-04 13:05:58,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:05:58,053 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:05:58,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:05:58,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1850137581, now seen corresponding path program 9 times [2020-09-04 13:05:58,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:05:58,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236547485] [2020-09-04 13:05:58,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:05:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:58,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:05:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:58,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:05:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:58,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:58,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:58,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-04 13:05:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:58,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:58,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:58,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:58,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:58,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:05:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-09-04 13:05:58,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236547485] [2020-09-04 13:05:58,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96205121] [2020-09-04 13:05:58,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:05:59,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-04 13:05:59,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:05:59,011 WARN L261 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 109 conjunts are in the unsatisfiable core [2020-09-04 13:05:59,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:05:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 5 proven. 108 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-09-04 13:05:59,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:05:59,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20] total 42 [2020-09-04 13:05:59,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765066465] [2020-09-04 13:05:59,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-09-04 13:05:59,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:05:59,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-09-04 13:05:59,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1611, Unknown=0, NotChecked=0, Total=1722 [2020-09-04 13:05:59,976 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 42 states. [2020-09-04 13:06:01,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:06:01,667 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-09-04 13:06:01,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 13:06:01,668 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 72 [2020-09-04 13:06:01,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:06:01,670 INFO L225 Difference]: With dead ends: 50 [2020-09-04 13:06:01,670 INFO L226 Difference]: Without dead ends: 46 [2020-09-04 13:06:01,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=226, Invalid=2744, Unknown=0, NotChecked=0, Total=2970 [2020-09-04 13:06:01,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-04 13:06:01,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-09-04 13:06:01,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-04 13:06:01,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-09-04 13:06:01,680 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 72 [2020-09-04 13:06:01,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:06:01,681 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-09-04 13:06:01,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-09-04 13:06:01,681 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-09-04 13:06:01,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-04 13:06:01,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:06:01,683 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] [2020-09-04 13:06:01,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:06:01,898 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:06:01,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:06:01,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1677321585, now seen corresponding path program 10 times [2020-09-04 13:06:01,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:06:01,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508633626] [2020-09-04 13:06:01,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:06:01,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:02,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:06:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:02,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:06:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:02,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:02,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:02,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:02,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:02,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:02,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-04 13:06:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:02,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:02,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:02,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:02,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-09-04 13:06:02,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508633626] [2020-09-04 13:06:02,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506573010] [2020-09-04 13:06:02,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:06:02,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:06:02,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:06:02,914 WARN L261 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 109 conjunts are in the unsatisfiable core [2020-09-04 13:06:02,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:06:03,789 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 4 proven. 106 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-09-04 13:06:03,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:06:03,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18] total 40 [2020-09-04 13:06:03,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679680729] [2020-09-04 13:06:03,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-04 13:06:03,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:06:03,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-04 13:06:03,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1453, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 13:06:03,792 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 40 states. [2020-09-04 13:06:05,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:06:05,210 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-09-04 13:06:05,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 13:06:05,211 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 72 [2020-09-04 13:06:05,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:06:05,213 INFO L225 Difference]: With dead ends: 52 [2020-09-04 13:06:05,213 INFO L226 Difference]: Without dead ends: 46 [2020-09-04 13:06:05,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=218, Invalid=2538, Unknown=0, NotChecked=0, Total=2756 [2020-09-04 13:06:05,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-04 13:06:05,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-09-04 13:06:05,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 13:06:05,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-09-04 13:06:05,225 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 72 [2020-09-04 13:06:05,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:06:05,226 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-09-04 13:06:05,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-04 13:06:05,226 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-09-04 13:06:05,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-04 13:06:05,227 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:06:05,227 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] [2020-09-04 13:06:05,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-09-04 13:06:05,441 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:06:05,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:06:05,442 INFO L82 PathProgramCache]: Analyzing trace with hash -2039564078, now seen corresponding path program 11 times [2020-09-04 13:06:05,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:06:05,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749675851] [2020-09-04 13:06:05,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:06:05,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:05,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:06:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:05,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:06:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:05,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:05,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:05,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:05,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-04 13:06:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:05,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:06,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:06,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:06,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:06,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:06,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:06,440 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-09-04 13:06:06,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749675851] [2020-09-04 13:06:06,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802568927] [2020-09-04 13:06:06,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:06:06,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-04 13:06:06,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:06:06,502 WARN L261 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 121 conjunts are in the unsatisfiable core [2020-09-04 13:06:06,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:06:07,586 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 5 proven. 134 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-09-04 13:06:07,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:06:07,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 20] total 44 [2020-09-04 13:06:07,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876515174] [2020-09-04 13:06:07,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-09-04 13:06:07,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:06:07,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-09-04 13:06:07,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1775, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 13:06:07,589 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 44 states. [2020-09-04 13:06:09,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:06:09,481 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-09-04 13:06:09,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 13:06:09,482 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 79 [2020-09-04 13:06:09,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:06:09,484 INFO L225 Difference]: With dead ends: 50 [2020-09-04 13:06:09,484 INFO L226 Difference]: Without dead ends: 46 [2020-09-04 13:06:09,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=234, Invalid=2958, Unknown=0, NotChecked=0, Total=3192 [2020-09-04 13:06:09,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-04 13:06:09,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-09-04 13:06:09,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-04 13:06:09,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-09-04 13:06:09,493 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 79 [2020-09-04 13:06:09,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:06:09,494 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-09-04 13:06:09,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-09-04 13:06:09,494 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-09-04 13:06:09,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-04 13:06:09,495 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:06:09,495 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] [2020-09-04 13:06:09,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-04 13:06:09,710 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:06:09,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:06:09,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1124697265, now seen corresponding path program 12 times [2020-09-04 13:06:09,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:06:09,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516059009] [2020-09-04 13:06:09,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:06:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:09,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:06:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:09,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:06:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:09,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:09,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:09,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-04 13:06:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:10,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:10,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:10,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:10,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:10,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:10,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:10,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:10,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:10,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 13 proven. 121 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-09-04 13:06:10,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516059009] [2020-09-04 13:06:10,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185197041] [2020-09-04 13:06:10,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:06:10,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-04 13:06:10,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:06:10,709 WARN L261 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 105 conjunts are in the unsatisfiable core [2020-09-04 13:06:10,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:06:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 37 proven. 104 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-09-04 13:06:12,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:06:12,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 49 [2020-09-04 13:06:12,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095947558] [2020-09-04 13:06:12,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-09-04 13:06:12,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:06:12,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-09-04 13:06:12,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2219, Unknown=0, NotChecked=0, Total=2352 [2020-09-04 13:06:12,147 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 49 states. [2020-09-04 13:06:14,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:06:14,392 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2020-09-04 13:06:14,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 13:06:14,393 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 72 [2020-09-04 13:06:14,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:06:14,395 INFO L225 Difference]: With dead ends: 53 [2020-09-04 13:06:14,395 INFO L226 Difference]: Without dead ends: 49 [2020-09-04 13:06:14,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=303, Invalid=3987, Unknown=0, NotChecked=0, Total=4290 [2020-09-04 13:06:14,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-04 13:06:14,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-09-04 13:06:14,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-04 13:06:14,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-09-04 13:06:14,408 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 72 [2020-09-04 13:06:14,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:06:14,409 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-09-04 13:06:14,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-09-04 13:06:14,409 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-09-04 13:06:14,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-04 13:06:14,410 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:06:14,410 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] [2020-09-04 13:06:14,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-04 13:06:14,612 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:06:14,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:06:14,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1806425208, now seen corresponding path program 13 times [2020-09-04 13:06:14,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:06:14,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141156108] [2020-09-04 13:06:14,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:06:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:14,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:06:14,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:14,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:06:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:14,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:14,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:14,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:14,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-04 13:06:14,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:15,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:15,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:15,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:15,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:15,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:15,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-09-04 13:06:15,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141156108] [2020-09-04 13:06:15,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332139911] [2020-09-04 13:06:15,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:06:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:15,667 WARN L261 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 121 conjunts are in the unsatisfiable core [2020-09-04 13:06:15,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:06:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-09-04 13:06:17,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:06:17,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22] total 46 [2020-09-04 13:06:17,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087014942] [2020-09-04 13:06:17,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-09-04 13:06:17,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:06:17,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-09-04 13:06:17,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1949, Unknown=0, NotChecked=0, Total=2070 [2020-09-04 13:06:17,119 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 46 states. [2020-09-04 13:06:19,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:06:19,221 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2020-09-04 13:06:19,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 13:06:19,222 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 79 [2020-09-04 13:06:19,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:06:19,223 INFO L225 Difference]: With dead ends: 55 [2020-09-04 13:06:19,224 INFO L226 Difference]: Without dead ends: 51 [2020-09-04 13:06:19,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=254, Invalid=3406, Unknown=0, NotChecked=0, Total=3660 [2020-09-04 13:06:19,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-04 13:06:19,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-09-04 13:06:19,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-04 13:06:19,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-09-04 13:06:19,235 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 79 [2020-09-04 13:06:19,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:06:19,235 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-09-04 13:06:19,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-09-04 13:06:19,236 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-09-04 13:06:19,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-04 13:06:19,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:06:19,237 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] [2020-09-04 13:06:19,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:06:19,444 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:06:19,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:06:19,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1615348441, now seen corresponding path program 14 times [2020-09-04 13:06:19,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:06:19,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206332497] [2020-09-04 13:06:19,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:06:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:19,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:06:19,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:19,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:06:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:19,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:19,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:19,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:19,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-04 13:06:19,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:19,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:20,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:20,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:20,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:20,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:20,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:20,625 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-09-04 13:06:20,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206332497] [2020-09-04 13:06:20,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076393216] [2020-09-04 13:06:20,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:06:20,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:06:20,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:06:20,678 WARN L261 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 133 conjunts are in the unsatisfiable core [2020-09-04 13:06:20,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:06:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 6 proven. 165 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-09-04 13:06:22,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:06:22,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 22] total 48 [2020-09-04 13:06:22,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456838129] [2020-09-04 13:06:22,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-09-04 13:06:22,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:06:22,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-09-04 13:06:22,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2129, Unknown=0, NotChecked=0, Total=2256 [2020-09-04 13:06:22,108 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 48 states. [2020-09-04 13:06:24,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:06:24,431 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-09-04 13:06:24,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 13:06:24,431 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 86 [2020-09-04 13:06:24,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:06:24,433 INFO L225 Difference]: With dead ends: 53 [2020-09-04 13:06:24,433 INFO L226 Difference]: Without dead ends: 49 [2020-09-04 13:06:24,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=262, Invalid=3644, Unknown=0, NotChecked=0, Total=3906 [2020-09-04 13:06:24,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-04 13:06:24,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-09-04 13:06:24,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-04 13:06:24,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-09-04 13:06:24,440 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 86 [2020-09-04 13:06:24,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:06:24,441 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-09-04 13:06:24,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-09-04 13:06:24,441 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-09-04 13:06:24,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-04 13:06:24,442 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:06:24,442 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] [2020-09-04 13:06:24,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-04 13:06:24,648 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:06:24,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:06:24,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1937884195, now seen corresponding path program 15 times [2020-09-04 13:06:24,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:06:24,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481649106] [2020-09-04 13:06:24,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:06:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:24,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:06:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:24,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:06:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:24,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:24,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:24,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:25,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:25,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-04 13:06:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:25,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:25,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:25,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:25,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:25,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:25,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-09-04 13:06:25,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481649106] [2020-09-04 13:06:25,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168905624] [2020-09-04 13:06:25,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:06:25,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-04 13:06:25,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:06:25,986 WARN L261 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 133 conjunts are in the unsatisfiable core [2020-09-04 13:06:25,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:06:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 5 proven. 163 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2020-09-04 13:06:27,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:06:27,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 20] total 46 [2020-09-04 13:06:27,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874289603] [2020-09-04 13:06:27,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-09-04 13:06:27,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:06:27,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-09-04 13:06:27,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1947, Unknown=0, NotChecked=0, Total=2070 [2020-09-04 13:06:27,259 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 46 states. [2020-09-04 13:06:29,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:06:29,460 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2020-09-04 13:06:29,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 13:06:29,460 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 86 [2020-09-04 13:06:29,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:06:29,462 INFO L225 Difference]: With dead ends: 55 [2020-09-04 13:06:29,462 INFO L226 Difference]: Without dead ends: 49 [2020-09-04 13:06:29,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=254, Invalid=3406, Unknown=0, NotChecked=0, Total=3660 [2020-09-04 13:06:29,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-04 13:06:29,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-09-04 13:06:29,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-04 13:06:29,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-09-04 13:06:29,472 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 86 [2020-09-04 13:06:29,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:06:29,475 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-09-04 13:06:29,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-09-04 13:06:29,475 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-09-04 13:06:29,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-04 13:06:29,477 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:06:29,477 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] [2020-09-04 13:06:29,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-04 13:06:29,690 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:06:29,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:06:29,691 INFO L82 PathProgramCache]: Analyzing trace with hash -335786642, now seen corresponding path program 16 times [2020-09-04 13:06:29,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:06:29,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987357447] [2020-09-04 13:06:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:06:29,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:29,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:06:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:29,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:06:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:29,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:29,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:30,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:30,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:30,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-04 13:06:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:30,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:30,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:30,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:30,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:30,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:30,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:31,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:31,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:31,187 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-09-04 13:06:31,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987357447] [2020-09-04 13:06:31,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474394415] [2020-09-04 13:06:31,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:06:31,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:06:31,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:06:31,262 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-09-04 13:06:31,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:06:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 6 proven. 197 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-09-04 13:06:32,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:06:32,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 22] total 50 [2020-09-04 13:06:32,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404632746] [2020-09-04 13:06:32,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-09-04 13:06:32,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:06:32,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-09-04 13:06:32,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2317, Unknown=0, NotChecked=0, Total=2450 [2020-09-04 13:06:32,961 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 50 states. [2020-09-04 13:06:35,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:06:35,575 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-09-04 13:06:35,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 13:06:35,576 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 93 [2020-09-04 13:06:35,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:06:35,577 INFO L225 Difference]: With dead ends: 53 [2020-09-04 13:06:35,577 INFO L226 Difference]: Without dead ends: 49 [2020-09-04 13:06:35,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=270, Invalid=3890, Unknown=0, NotChecked=0, Total=4160 [2020-09-04 13:06:35,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-04 13:06:35,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-09-04 13:06:35,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-04 13:06:35,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-09-04 13:06:35,588 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 93 [2020-09-04 13:06:35,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:06:35,588 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-09-04 13:06:35,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-09-04 13:06:35,588 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-09-04 13:06:35,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-04 13:06:35,589 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:06:35,589 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] [2020-09-04 13:06:35,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-04 13:06:35,791 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:06:35,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:06:35,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1266374702, now seen corresponding path program 17 times [2020-09-04 13:06:35,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:06:35,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62940142] [2020-09-04 13:06:35,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:06:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:35,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:06:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:35,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:06:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:36,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:36,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-04 13:06:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:36,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:36,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:36,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:36,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:36,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:36,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:36,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 15 proven. 150 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-09-04 13:06:36,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62940142] [2020-09-04 13:06:36,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148744516] [2020-09-04 13:06:36,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:06:37,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-04 13:06:37,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:06:37,004 WARN L261 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 117 conjunts are in the unsatisfiable core [2020-09-04 13:06:37,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:06:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 42 proven. 131 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-09-04 13:06:38,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:06:38,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 53 [2020-09-04 13:06:38,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110112937] [2020-09-04 13:06:38,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-09-04 13:06:38,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:06:38,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-09-04 13:06:38,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2613, Unknown=0, NotChecked=0, Total=2756 [2020-09-04 13:06:38,880 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 53 states. [2020-09-04 13:06:41,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:06:41,886 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-09-04 13:06:41,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-04 13:06:41,888 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 79 [2020-09-04 13:06:41,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:06:41,889 INFO L225 Difference]: With dead ends: 56 [2020-09-04 13:06:41,889 INFO L226 Difference]: Without dead ends: 52 [2020-09-04 13:06:41,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=335, Invalid=4777, Unknown=0, NotChecked=0, Total=5112 [2020-09-04 13:06:41,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-04 13:06:41,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-09-04 13:06:41,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-04 13:06:41,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-09-04 13:06:41,896 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 79 [2020-09-04 13:06:41,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:06:41,897 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-09-04 13:06:41,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-09-04 13:06:41,897 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-09-04 13:06:41,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-04 13:06:41,898 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:06:41,898 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] [2020-09-04 13:06:42,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:06:42,107 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:06:42,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:06:42,108 INFO L82 PathProgramCache]: Analyzing trace with hash -180332919, now seen corresponding path program 18 times [2020-09-04 13:06:42,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:06:42,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770252494] [2020-09-04 13:06:42,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:06:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:42,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:06:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:42,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:06:42,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:42,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:42,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:42,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:42,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-04 13:06:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:42,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:42,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:42,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:42,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:43,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:43,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:43,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-09-04 13:06:43,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770252494] [2020-09-04 13:06:43,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392342298] [2020-09-04 13:06:43,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:06:43,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-04 13:06:43,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:06:43,521 WARN L261 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 133 conjunts are in the unsatisfiable core [2020-09-04 13:06:43,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:06:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 7 proven. 167 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2020-09-04 13:06:45,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:06:45,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 24] total 50 [2020-09-04 13:06:45,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247877647] [2020-09-04 13:06:45,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-09-04 13:06:45,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:06:45,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-09-04 13:06:45,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2319, Unknown=0, NotChecked=0, Total=2450 [2020-09-04 13:06:45,191 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 50 states. [2020-09-04 13:06:47,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:06:47,890 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-09-04 13:06:47,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-04 13:06:47,891 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 86 [2020-09-04 13:06:47,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:06:47,892 INFO L225 Difference]: With dead ends: 58 [2020-09-04 13:06:47,892 INFO L226 Difference]: Without dead ends: 54 [2020-09-04 13:06:47,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=282, Invalid=4140, Unknown=0, NotChecked=0, Total=4422 [2020-09-04 13:06:47,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-04 13:06:47,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-09-04 13:06:47,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-04 13:06:47,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-09-04 13:06:47,899 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 86 [2020-09-04 13:06:47,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:06:47,899 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-09-04 13:06:47,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-09-04 13:06:47,899 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-09-04 13:06:47,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-04 13:06:47,901 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:06:47,901 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] [2020-09-04 13:06:48,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:06:48,112 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:06:48,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:06:48,113 INFO L82 PathProgramCache]: Analyzing trace with hash -313052920, now seen corresponding path program 19 times [2020-09-04 13:06:48,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:06:48,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886511923] [2020-09-04 13:06:48,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:06:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:48,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:06:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:48,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:06:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:48,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:48,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:48,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:48,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-04 13:06:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:48,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:48,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:48,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:49,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:49,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:49,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:49,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-09-04 13:06:49,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886511923] [2020-09-04 13:06:49,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281553732] [2020-09-04 13:06:49,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:06:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:49,688 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-09-04 13:06:49,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:06:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 7 proven. 199 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2020-09-04 13:06:51,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:06:51,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 24] total 52 [2020-09-04 13:06:51,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024188353] [2020-09-04 13:06:51,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-09-04 13:06:51,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:06:51,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-09-04 13:06:51,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2515, Unknown=0, NotChecked=0, Total=2652 [2020-09-04 13:06:51,521 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 52 states. [2020-09-04 13:06:54,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:06:54,343 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-09-04 13:06:54,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-04 13:06:54,344 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 93 [2020-09-04 13:06:54,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:06:54,346 INFO L225 Difference]: With dead ends: 58 [2020-09-04 13:06:54,346 INFO L226 Difference]: Without dead ends: 54 [2020-09-04 13:06:54,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=290, Invalid=4402, Unknown=0, NotChecked=0, Total=4692 [2020-09-04 13:06:54,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-04 13:06:54,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-09-04 13:06:54,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-04 13:06:54,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-09-04 13:06:54,352 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 93 [2020-09-04 13:06:54,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:06:54,352 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-09-04 13:06:54,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-09-04 13:06:54,353 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-09-04 13:06:54,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-09-04 13:06:54,353 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:06:54,354 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] [2020-09-04 13:06:54,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-04 13:06:54,561 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:06:54,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:06:54,562 INFO L82 PathProgramCache]: Analyzing trace with hash -789379885, now seen corresponding path program 20 times [2020-09-04 13:06:54,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:06:54,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429434135] [2020-09-04 13:06:54,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:06:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:54,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:06:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:54,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:06:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:54,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:54,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:54,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:54,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:55,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:55,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:55,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-04 13:06:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:55,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:55,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:55,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:55,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:55,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:55,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:55,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:56,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:06:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:06:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-09-04 13:06:56,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429434135] [2020-09-04 13:06:56,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129199428] [2020-09-04 13:06:56,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:06:56,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:06:56,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:06:56,330 WARN L261 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2020-09-04 13:06:56,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:06:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 7 proven. 234 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2020-09-04 13:06:58,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:06:58,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 24] total 54 [2020-09-04 13:06:58,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715607457] [2020-09-04 13:06:58,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-09-04 13:06:58,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:06:58,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-09-04 13:06:58,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2719, Unknown=0, NotChecked=0, Total=2862 [2020-09-04 13:06:58,419 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 54 states. [2020-09-04 13:07:01,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:07:01,664 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2020-09-04 13:07:01,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-04 13:07:01,664 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 100 [2020-09-04 13:07:01,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:07:01,666 INFO L225 Difference]: With dead ends: 56 [2020-09-04 13:07:01,666 INFO L226 Difference]: Without dead ends: 52 [2020-09-04 13:07:01,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=298, Invalid=4672, Unknown=0, NotChecked=0, Total=4970 [2020-09-04 13:07:01,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-04 13:07:01,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-09-04 13:07:01,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-04 13:07:01,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2020-09-04 13:07:01,673 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 100 [2020-09-04 13:07:01,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:07:01,673 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2020-09-04 13:07:01,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-09-04 13:07:01,673 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2020-09-04 13:07:01,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-04 13:07:01,674 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:07:01,674 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] [2020-09-04 13:07:01,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-04 13:07:01,883 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:07:01,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:07:01,884 INFO L82 PathProgramCache]: Analyzing trace with hash -439702833, now seen corresponding path program 21 times [2020-09-04 13:07:01,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:07:01,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454272142] [2020-09-04 13:07:01,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:07:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:01,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:07:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:01,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:07:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:02,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:02,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:02,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:02,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:02,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:02,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:02,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-04 13:07:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:02,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:02,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:02,968 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 22 proven. 119 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-09-04 13:07:02,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454272142] [2020-09-04 13:07:02,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318048049] [2020-09-04 13:07:02,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:07:03,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-04 13:07:03,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:07:03,024 WARN L261 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 109 conjunts are in the unsatisfiable core [2020-09-04 13:07:03,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:07:04,240 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 2 proven. 111 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-09-04 13:07:04,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:07:04,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20] total 42 [2020-09-04 13:07:04,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296950632] [2020-09-04 13:07:04,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-09-04 13:07:04,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:07:04,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-09-04 13:07:04,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1611, Unknown=0, NotChecked=0, Total=1722 [2020-09-04 13:07:04,242 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 42 states. [2020-09-04 13:07:06,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:07:06,747 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2020-09-04 13:07:06,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 13:07:06,748 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 72 [2020-09-04 13:07:06,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:07:06,749 INFO L225 Difference]: With dead ends: 58 [2020-09-04 13:07:06,750 INFO L226 Difference]: Without dead ends: 52 [2020-09-04 13:07:06,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=238, Invalid=2954, Unknown=0, NotChecked=0, Total=3192 [2020-09-04 13:07:06,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-04 13:07:06,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-09-04 13:07:06,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-04 13:07:06,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2020-09-04 13:07:06,755 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 72 [2020-09-04 13:07:06,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:07:06,755 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2020-09-04 13:07:06,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-09-04 13:07:06,755 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2020-09-04 13:07:06,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-09-04 13:07:06,756 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:07:06,757 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] [2020-09-04 13:07:06,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:07:06,968 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:07:06,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:07:06,969 INFO L82 PathProgramCache]: Analyzing trace with hash -793317021, now seen corresponding path program 22 times [2020-09-04 13:07:06,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:07:06,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873323891] [2020-09-04 13:07:06,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:07:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:07,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:07:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:07,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:07:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:07,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:07,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:07,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:07,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:07,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:07,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:07,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-04 13:07:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:07,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:07,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:07,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:08,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:08,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:08,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:08,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:08,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:08,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:08,663 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-09-04 13:07:08,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873323891] [2020-09-04 13:07:08,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020061246] [2020-09-04 13:07:08,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:07:08,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:07:08,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:07:08,724 WARN L261 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2020-09-04 13:07:08,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:07:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 6 proven. 232 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2020-09-04 13:07:10,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:07:10,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 22] total 52 [2020-09-04 13:07:10,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190607837] [2020-09-04 13:07:10,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-09-04 13:07:10,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:07:10,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-09-04 13:07:10,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2513, Unknown=0, NotChecked=0, Total=2652 [2020-09-04 13:07:10,518 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand 52 states. [2020-09-04 13:07:13,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:07:13,349 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-09-04 13:07:13,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 13:07:13,351 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 100 [2020-09-04 13:07:13,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:07:13,352 INFO L225 Difference]: With dead ends: 56 [2020-09-04 13:07:13,352 INFO L226 Difference]: Without dead ends: 52 [2020-09-04 13:07:13,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=278, Invalid=4144, Unknown=0, NotChecked=0, Total=4422 [2020-09-04 13:07:13,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-04 13:07:13,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-09-04 13:07:13,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-04 13:07:13,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-09-04 13:07:13,362 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 100 [2020-09-04 13:07:13,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:07:13,362 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-09-04 13:07:13,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-09-04 13:07:13,362 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-09-04 13:07:13,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-09-04 13:07:13,363 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:07:13,363 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] [2020-09-04 13:07:13,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-04 13:07:13,577 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:07:13,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:07:13,578 INFO L82 PathProgramCache]: Analyzing trace with hash -787811522, now seen corresponding path program 23 times [2020-09-04 13:07:13,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:07:13,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181651680] [2020-09-04 13:07:13,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:07:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:13,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:07:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:13,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:07:13,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:13,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:13,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:13,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:14,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:14,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:14,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-04 13:07:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:14,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:14,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:14,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:14,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:14,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:15,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:15,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:15,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:15,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:15,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:15,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:15,732 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-09-04 13:07:15,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181651680] [2020-09-04 13:07:15,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897613299] [2020-09-04 13:07:15,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:07:15,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-09-04 13:07:15,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:07:15,811 WARN L261 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2020-09-04 13:07:15,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:07:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 7 proven. 272 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2020-09-04 13:07:17,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:07:17,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 24] total 56 [2020-09-04 13:07:17,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828639660] [2020-09-04 13:07:17,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-09-04 13:07:17,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:07:17,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-09-04 13:07:17,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2931, Unknown=0, NotChecked=0, Total=3080 [2020-09-04 13:07:17,961 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 56 states. [2020-09-04 13:07:21,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:07:21,554 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2020-09-04 13:07:21,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-04 13:07:21,555 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 107 [2020-09-04 13:07:21,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:07:21,556 INFO L225 Difference]: With dead ends: 56 [2020-09-04 13:07:21,556 INFO L226 Difference]: Without dead ends: 52 [2020-09-04 13:07:21,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=306, Invalid=4950, Unknown=0, NotChecked=0, Total=5256 [2020-09-04 13:07:21,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-04 13:07:21,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-09-04 13:07:21,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-04 13:07:21,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2020-09-04 13:07:21,562 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 107 [2020-09-04 13:07:21,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:07:21,564 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2020-09-04 13:07:21,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-09-04 13:07:21,564 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2020-09-04 13:07:21,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-04 13:07:21,565 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:07:21,565 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] [2020-09-04 13:07:21,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:07:21,778 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:07:21,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:07:21,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1080603673, now seen corresponding path program 24 times [2020-09-04 13:07:21,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:07:21,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513228276] [2020-09-04 13:07:21,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:07:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:21,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:07:21,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:21,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:07:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:22,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:22,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-04 13:07:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:22,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:22,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:22,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:22,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:22,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:22,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:22,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:22,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:22,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:23,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:23,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:23,313 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 17 proven. 182 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-09-04 13:07:23,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513228276] [2020-09-04 13:07:23,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010450949] [2020-09-04 13:07:23,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:07:23,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-04 13:07:23,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:07:23,373 WARN L261 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 129 conjunts are in the unsatisfiable core [2020-09-04 13:07:23,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:07:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 47 proven. 161 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-09-04 13:07:25,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:07:25,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 57 [2020-09-04 13:07:25,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546106673] [2020-09-04 13:07:25,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-09-04 13:07:25,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:07:25,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-09-04 13:07:25,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=3039, Unknown=0, NotChecked=0, Total=3192 [2020-09-04 13:07:25,876 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 57 states. [2020-09-04 13:07:29,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:07:29,717 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2020-09-04 13:07:29,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-04 13:07:29,718 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 86 [2020-09-04 13:07:29,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:07:29,720 INFO L225 Difference]: With dead ends: 59 [2020-09-04 13:07:29,720 INFO L226 Difference]: Without dead ends: 55 [2020-09-04 13:07:29,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=367, Invalid=5639, Unknown=0, NotChecked=0, Total=6006 [2020-09-04 13:07:29,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-04 13:07:29,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-09-04 13:07:29,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 13:07:29,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2020-09-04 13:07:29,727 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 86 [2020-09-04 13:07:29,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:07:29,728 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2020-09-04 13:07:29,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-09-04 13:07:29,728 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2020-09-04 13:07:29,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-04 13:07:29,732 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:07:29,732 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] [2020-09-04 13:07:29,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-04 13:07:29,943 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:07:29,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:07:29,944 INFO L82 PathProgramCache]: Analyzing trace with hash 365189506, now seen corresponding path program 25 times [2020-09-04 13:07:29,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:07:29,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114753811] [2020-09-04 13:07:29,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:07:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:30,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:07:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:30,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:07:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:30,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:30,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:30,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-04 13:07:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:30,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:30,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:30,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:30,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:30,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:30,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:31,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:31,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:31,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:31,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:31,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-09-04 13:07:31,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114753811] [2020-09-04 13:07:31,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783286806] [2020-09-04 13:07:31,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:07:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:31,902 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-09-04 13:07:31,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:07:34,332 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 8 proven. 201 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2020-09-04 13:07:34,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:07:34,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 26] total 54 [2020-09-04 13:07:34,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948018445] [2020-09-04 13:07:34,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-09-04 13:07:34,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:07:34,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-09-04 13:07:34,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2721, Unknown=0, NotChecked=0, Total=2862 [2020-09-04 13:07:34,334 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 54 states. [2020-09-04 13:07:38,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:07:38,915 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2020-09-04 13:07:38,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-04 13:07:38,917 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 93 [2020-09-04 13:07:38,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:07:38,918 INFO L225 Difference]: With dead ends: 61 [2020-09-04 13:07:38,918 INFO L226 Difference]: Without dead ends: 57 [2020-09-04 13:07:38,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=310, Invalid=4946, Unknown=0, NotChecked=0, Total=5256 [2020-09-04 13:07:38,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-04 13:07:38,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-09-04 13:07:38,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 13:07:38,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2020-09-04 13:07:38,926 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 93 [2020-09-04 13:07:38,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:07:38,926 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2020-09-04 13:07:38,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-09-04 13:07:38,927 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2020-09-04 13:07:38,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-09-04 13:07:38,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:07:38,928 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] [2020-09-04 13:07:39,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-09-04 13:07:39,130 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:07:39,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:07:39,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1104773667, now seen corresponding path program 26 times [2020-09-04 13:07:39,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:07:39,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523424480] [2020-09-04 13:07:39,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:07:39,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:39,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:07:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:39,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:07:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:39,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:39,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:39,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:39,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-04 13:07:39,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:39,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:40,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:40,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:40,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:40,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:40,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:40,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:40,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:41,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:41,222 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-09-04 13:07:41,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523424480] [2020-09-04 13:07:41,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204891332] [2020-09-04 13:07:41,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:07:41,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:07:41,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:07:41,282 WARN L261 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2020-09-04 13:07:41,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:07:43,968 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 8 proven. 236 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-09-04 13:07:43,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:07:43,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 26] total 56 [2020-09-04 13:07:43,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319681962] [2020-09-04 13:07:43,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-09-04 13:07:43,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:07:43,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-09-04 13:07:43,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2933, Unknown=0, NotChecked=0, Total=3080 [2020-09-04 13:07:43,971 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 56 states. [2020-09-04 13:07:49,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:07:49,180 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2020-09-04 13:07:49,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-04 13:07:49,182 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 100 [2020-09-04 13:07:49,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:07:49,184 INFO L225 Difference]: With dead ends: 61 [2020-09-04 13:07:49,184 INFO L226 Difference]: Without dead ends: 57 [2020-09-04 13:07:49,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=318, Invalid=5232, Unknown=0, NotChecked=0, Total=5550 [2020-09-04 13:07:49,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-04 13:07:49,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-09-04 13:07:49,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 13:07:49,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2020-09-04 13:07:49,191 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 100 [2020-09-04 13:07:49,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:07:49,192 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2020-09-04 13:07:49,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-09-04 13:07:49,192 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2020-09-04 13:07:49,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-09-04 13:07:49,193 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:07:49,193 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] [2020-09-04 13:07:49,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-04 13:07:49,397 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:07:49,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:07:49,398 INFO L82 PathProgramCache]: Analyzing trace with hash 560522232, now seen corresponding path program 27 times [2020-09-04 13:07:49,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:07:49,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248027725] [2020-09-04 13:07:49,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:07:49,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:49,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:07:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:49,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:07:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:49,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:49,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:49,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:49,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:50,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:50,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-04 13:07:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:50,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:50,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:50,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:50,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:50,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:50,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:51,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:51,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:51,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:07:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:07:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-09-04 13:07:51,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248027725] [2020-09-04 13:07:51,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227406024] [2020-09-04 13:07:51,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:07:51,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-09-04 13:07:51,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:07:51,846 WARN L261 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2020-09-04 13:07:51,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:07:54,714 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 8 proven. 274 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2020-09-04 13:07:54,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:07:54,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 26] total 58 [2020-09-04 13:07:54,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385436461] [2020-09-04 13:07:54,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-09-04 13:07:54,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:07:54,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-09-04 13:07:54,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=3153, Unknown=0, NotChecked=0, Total=3306 [2020-09-04 13:07:54,716 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 58 states. [2020-09-04 13:07:59,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:07:59,773 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2020-09-04 13:07:59,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-04 13:07:59,775 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 107 [2020-09-04 13:07:59,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:07:59,777 INFO L225 Difference]: With dead ends: 61 [2020-09-04 13:07:59,777 INFO L226 Difference]: Without dead ends: 57 [2020-09-04 13:07:59,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=326, Invalid=5526, Unknown=0, NotChecked=0, Total=5852 [2020-09-04 13:07:59,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-04 13:07:59,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-09-04 13:07:59,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 13:07:59,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2020-09-04 13:07:59,785 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 107 [2020-09-04 13:07:59,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:07:59,785 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2020-09-04 13:07:59,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-09-04 13:07:59,786 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2020-09-04 13:07:59,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-09-04 13:07:59,786 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:07:59,787 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] [2020-09-04 13:08:00,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-04 13:08:00,003 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:08:00,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:08:00,003 INFO L82 PathProgramCache]: Analyzing trace with hash -330893523, now seen corresponding path program 28 times [2020-09-04 13:08:00,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:08:00,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741970050] [2020-09-04 13:08:00,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:08:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:00,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:08:00,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:00,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:08:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:00,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:00,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:00,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:00,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:00,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:00,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:00,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-04 13:08:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:01,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:01,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:01,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:01,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:01,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:02,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:02,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:02,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:02,633 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-09-04 13:08:02,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741970050] [2020-09-04 13:08:02,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150656432] [2020-09-04 13:08:02,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:08:02,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:08:02,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:08:02,704 WARN L261 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-09-04 13:08:02,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:08:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 8 proven. 315 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2020-09-04 13:08:05,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:08:05,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 26] total 60 [2020-09-04 13:08:05,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637334894] [2020-09-04 13:08:05,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-09-04 13:08:05,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:08:05,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-09-04 13:08:05,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=3381, Unknown=0, NotChecked=0, Total=3540 [2020-09-04 13:08:05,854 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 60 states. [2020-09-04 13:08:11,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:08:11,360 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2020-09-04 13:08:11,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-04 13:08:11,362 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 114 [2020-09-04 13:08:11,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:08:11,363 INFO L225 Difference]: With dead ends: 59 [2020-09-04 13:08:11,363 INFO L226 Difference]: Without dead ends: 55 [2020-09-04 13:08:11,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=334, Invalid=5828, Unknown=0, NotChecked=0, Total=6162 [2020-09-04 13:08:11,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-04 13:08:11,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2020-09-04 13:08:11,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-04 13:08:11,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2020-09-04 13:08:11,371 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 114 [2020-09-04 13:08:11,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:08:11,371 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2020-09-04 13:08:11,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-09-04 13:08:11,371 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2020-09-04 13:08:11,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-04 13:08:11,372 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:08:11,372 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] [2020-09-04 13:08:11,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:08:11,586 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:08:11,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:08:11,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1343946330, now seen corresponding path program 29 times [2020-09-04 13:08:11,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:08:11,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32742665] [2020-09-04 13:08:11,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:08:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:11,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:08:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:11,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:08:11,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:11,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:11,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:11,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:11,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:12,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:12,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:12,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:12,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:12,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-04 13:08:12,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:12,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:12,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:12,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:13,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:13,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:13,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 34 proven. 215 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-09-04 13:08:13,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32742665] [2020-09-04 13:08:13,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518277631] [2020-09-04 13:08:13,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:08:13,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-04 13:08:13,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:08:13,573 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-09-04 13:08:13,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:08:15,697 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_div_47 already exists [2020-09-04 13:08:15,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:08:15,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-04 13:08:15,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902992839] [2020-09-04 13:08:15,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-04 13:08:15,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:08:15,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-04 13:08:15,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2317, Unknown=0, NotChecked=0, Total=2450 [2020-09-04 13:08:15,700 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand 32 states. [2020-09-04 13:08:19,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:08:19,029 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2020-09-04 13:08:19,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 13:08:19,031 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 93 [2020-09-04 13:08:19,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:08:19,032 INFO L225 Difference]: With dead ends: 59 [2020-09-04 13:08:19,033 INFO L226 Difference]: Without dead ends: 55 [2020-09-04 13:08:19,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=262, Invalid=3898, Unknown=0, NotChecked=0, Total=4160 [2020-09-04 13:08:19,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-04 13:08:19,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-09-04 13:08:19,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 13:08:19,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 78 transitions. [2020-09-04 13:08:19,039 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 78 transitions. Word has length 93 [2020-09-04 13:08:19,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:08:19,040 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 78 transitions. [2020-09-04 13:08:19,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-04 13:08:19,040 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 78 transitions. [2020-09-04 13:08:19,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-09-04 13:08:19,041 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:08:19,041 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] [2020-09-04 13:08:19,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:08:19,248 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:08:19,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:08:19,248 INFO L82 PathProgramCache]: Analyzing trace with hash 831596388, now seen corresponding path program 30 times [2020-09-04 13:08:19,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:08:19,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629905592] [2020-09-04 13:08:19,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:08:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:19,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:08:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:19,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:08:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:19,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:19,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:19,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:19,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:19,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:20,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:20,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-04 13:08:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:20,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:20,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:20,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:20,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:20,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:20,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 42 proven. 274 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2020-09-04 13:08:20,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629905592] [2020-09-04 13:08:20,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230908106] [2020-09-04 13:08:20,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:08:20,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-09-04 13:08:20,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:08:20,677 WARN L261 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2020-09-04 13:08:20,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:08:22,579 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_div_47 already exists [2020-09-04 13:08:22,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:08:22,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-04 13:08:22,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083720194] [2020-09-04 13:08:22,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-04 13:08:22,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:08:22,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-04 13:08:22,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1535, Unknown=0, NotChecked=0, Total=1640 [2020-09-04 13:08:22,581 INFO L87 Difference]: Start difference. First operand 51 states and 78 transitions. Second operand 23 states. [2020-09-04 13:08:24,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:08:24,770 INFO L93 Difference]: Finished difference Result 59 states and 84 transitions. [2020-09-04 13:08:24,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 13:08:24,772 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 107 [2020-09-04 13:08:24,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:08:24,773 INFO L225 Difference]: With dead ends: 59 [2020-09-04 13:08:24,774 INFO L226 Difference]: Without dead ends: 55 [2020-09-04 13:08:24,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=217, Invalid=2863, Unknown=0, NotChecked=0, Total=3080 [2020-09-04 13:08:24,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-04 13:08:24,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-09-04 13:08:24,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 13:08:24,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 77 transitions. [2020-09-04 13:08:24,781 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 77 transitions. Word has length 107 [2020-09-04 13:08:24,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:08:24,781 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 77 transitions. [2020-09-04 13:08:24,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-04 13:08:24,781 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 77 transitions. [2020-09-04 13:08:24,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-04 13:08:24,782 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:08:24,783 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] [2020-09-04 13:08:24,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:08:24,997 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:08:24,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:08:24,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1776686958, now seen corresponding path program 31 times [2020-09-04 13:08:24,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:08:24,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873025315] [2020-09-04 13:08:24,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:08:25,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:25,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:08:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:25,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:08:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:25,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:25,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:25,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:25,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:25,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:26,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:26,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-04 13:08:26,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:26,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:26,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:26,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:26,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:27,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:27,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:27,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:27,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:27,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:28,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:28,255 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-09-04 13:08:28,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873025315] [2020-09-04 13:08:28,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930131758] [2020-09-04 13:08:28,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:08:28,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:28,328 WARN L261 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 193 conjunts are in the unsatisfiable core [2020-09-04 13:08:28,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:08:31,889 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_div_47 already exists [2020-09-04 13:08:31,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:08:31,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-09-04 13:08:31,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643944312] [2020-09-04 13:08:31,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-04 13:08:31,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:08:31,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-04 13:08:31,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3617, Unknown=0, NotChecked=0, Total=3782 [2020-09-04 13:08:31,892 INFO L87 Difference]: Start difference. First operand 51 states and 77 transitions. Second operand 40 states. [2020-09-04 13:08:37,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:08:37,287 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2020-09-04 13:08:37,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-04 13:08:37,289 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 121 [2020-09-04 13:08:37,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:08:37,290 INFO L225 Difference]: With dead ends: 59 [2020-09-04 13:08:37,290 INFO L226 Difference]: Without dead ends: 55 [2020-09-04 13:08:37,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=334, Invalid=6146, Unknown=0, NotChecked=0, Total=6480 [2020-09-04 13:08:37,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-04 13:08:37,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-09-04 13:08:37,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 13:08:37,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 76 transitions. [2020-09-04 13:08:37,297 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 76 transitions. Word has length 121 [2020-09-04 13:08:37,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:08:37,297 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 76 transitions. [2020-09-04 13:08:37,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-04 13:08:37,297 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 76 transitions. [2020-09-04 13:08:37,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-04 13:08:37,298 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:08:37,298 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] [2020-09-04 13:08:37,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-09-04 13:08:37,511 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:08:37,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:08:37,512 INFO L82 PathProgramCache]: Analyzing trace with hash -256846799, now seen corresponding path program 32 times [2020-09-04 13:08:37,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:08:37,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640802402] [2020-09-04 13:08:37,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:08:37,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:37,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:08:37,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:37,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:08:37,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:37,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:37,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:37,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:37,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:37,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:38,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:38,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:38,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:38,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:38,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-04 13:08:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:38,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:39,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:39,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:39,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 30 proven. 180 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-09-04 13:08:39,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640802402] [2020-09-04 13:08:39,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042305298] [2020-09-04 13:08:39,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:08:39,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:08:39,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:08:39,369 WARN L261 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 133 conjunts are in the unsatisfiable core [2020-09-04 13:08:39,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:08:41,573 INFO L721 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-09-04 13:08:41,622 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 3 proven. 168 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-09-04 13:08:41,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:08:41,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 22] total 48 [2020-09-04 13:08:41,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802575320] [2020-09-04 13:08:41,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-09-04 13:08:41,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:08:41,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-09-04 13:08:41,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2129, Unknown=0, NotChecked=0, Total=2256 [2020-09-04 13:08:41,625 INFO L87 Difference]: Start difference. First operand 51 states and 76 transitions. Second operand 48 states. [2020-09-04 13:08:45,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:08:45,959 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2020-09-04 13:08:45,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-04 13:08:45,960 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 86 [2020-09-04 13:08:45,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:08:45,961 INFO L225 Difference]: With dead ends: 61 [2020-09-04 13:08:45,961 INFO L226 Difference]: Without dead ends: 55 [2020-09-04 13:08:45,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=274, Invalid=3886, Unknown=0, NotChecked=0, Total=4160 [2020-09-04 13:08:45,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-04 13:08:45,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-09-04 13:08:45,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 13:08:45,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2020-09-04 13:08:45,967 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 86 [2020-09-04 13:08:45,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:08:45,967 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2020-09-04 13:08:45,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-09-04 13:08:45,967 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2020-09-04 13:08:45,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-09-04 13:08:45,968 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:08:45,968 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] [2020-09-04 13:08:46,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:08:46,181 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:08:46,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:08:46,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1907807715, now seen corresponding path program 33 times [2020-09-04 13:08:46,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:08:46,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513319817] [2020-09-04 13:08:46,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:08:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:46,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:08:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:46,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:08:46,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:46,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:46,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:46,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:46,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:46,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:46,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:47,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:47,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-04 13:08:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:47,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:47,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:48,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:48,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:48,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:48,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:48,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:48,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:48,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:49,150 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-09-04 13:08:49,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513319817] [2020-09-04 13:08:49,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555540118] [2020-09-04 13:08:49,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:08:49,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-09-04 13:08:49,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:08:49,246 WARN L261 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-09-04 13:08:49,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:08:52,812 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 15 proven. 306 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2020-09-04 13:08:52,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:08:52,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 24] total 58 [2020-09-04 13:08:52,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927035381] [2020-09-04 13:08:52,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-09-04 13:08:52,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:08:52,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-09-04 13:08:52,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=3151, Unknown=0, NotChecked=0, Total=3306 [2020-09-04 13:08:52,815 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand 58 states. [2020-09-04 13:08:57,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:08:57,348 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2020-09-04 13:08:57,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-04 13:08:57,350 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2020-09-04 13:08:57,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:08:57,351 INFO L225 Difference]: With dead ends: 59 [2020-09-04 13:08:57,351 INFO L226 Difference]: Without dead ends: 55 [2020-09-04 13:08:57,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=314, Invalid=5236, Unknown=0, NotChecked=0, Total=5550 [2020-09-04 13:08:57,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-04 13:08:57,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2020-09-04 13:08:57,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-04 13:08:57,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2020-09-04 13:08:57,359 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 114 [2020-09-04 13:08:57,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:08:57,360 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2020-09-04 13:08:57,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-09-04 13:08:57,360 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2020-09-04 13:08:57,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-04 13:08:57,361 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:08:57,361 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] [2020-09-04 13:08:57,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-09-04 13:08:57,568 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:08:57,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:08:57,569 INFO L82 PathProgramCache]: Analyzing trace with hash 183807880, now seen corresponding path program 34 times [2020-09-04 13:08:57,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:08:57,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910605987] [2020-09-04 13:08:57,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:08:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:57,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:08:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:57,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:08:57,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:57,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:57,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-04 13:08:57,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:58,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:58,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:58,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:58,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:58,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:58,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:58,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:59,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:59,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:59,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:59,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:08:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:08:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 19 proven. 217 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-09-04 13:08:59,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910605987] [2020-09-04 13:08:59,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63973654] [2020-09-04 13:08:59,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:08:59,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:08:59,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:08:59,977 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 141 conjunts are in the unsatisfiable core [2020-09-04 13:08:59,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:09:03,904 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 52 proven. 194 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-09-04 13:09:03,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:09:03,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 61 [2020-09-04 13:09:03,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988937272] [2020-09-04 13:09:03,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-09-04 13:09:03,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:09:03,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-09-04 13:09:03,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3497, Unknown=0, NotChecked=0, Total=3660 [2020-09-04 13:09:03,906 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand 61 states. [2020-09-04 13:09:10,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:09:10,838 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2020-09-04 13:09:10,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-04 13:09:10,841 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 93 [2020-09-04 13:09:10,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:09:10,843 INFO L225 Difference]: With dead ends: 62 [2020-09-04 13:09:10,843 INFO L226 Difference]: Without dead ends: 58 [2020-09-04 13:09:10,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=399, Invalid=6573, Unknown=0, NotChecked=0, Total=6972 [2020-09-04 13:09:10,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-04 13:09:10,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-09-04 13:09:10,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-04 13:09:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-09-04 13:09:10,850 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 93 [2020-09-04 13:09:10,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:09:10,850 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-09-04 13:09:10,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-09-04 13:09:10,850 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-09-04 13:09:10,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-09-04 13:09:10,851 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:09:10,851 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] [2020-09-04 13:09:11,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:09:11,064 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:09:11,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:09:11,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1182847487, now seen corresponding path program 35 times [2020-09-04 13:09:11,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:09:11,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151819950] [2020-09-04 13:09:11,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:09:11,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:11,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:09:11,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:11,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:09:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:11,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:11,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:11,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:11,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-04 13:09:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:11,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:11,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:12,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:12,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:12,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:12,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:12,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:12,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:13,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:13,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:13,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:13,684 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-09-04 13:09:13,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151819950] [2020-09-04 13:09:13,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413075182] [2020-09-04 13:09:13,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:09:13,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-09-04 13:09:13,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:09:13,761 WARN L261 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2020-09-04 13:09:13,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:09:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 19 proven. 229 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-09-04 13:09:17,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:09:17,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 28] total 58 [2020-09-04 13:09:17,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047495436] [2020-09-04 13:09:17,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-09-04 13:09:17,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:09:17,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-09-04 13:09:17,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3155, Unknown=0, NotChecked=0, Total=3306 [2020-09-04 13:09:17,256 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 58 states. [2020-09-04 13:09:22,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:09:22,881 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-09-04 13:09:22,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-04 13:09:22,884 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 100 [2020-09-04 13:09:22,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:09:22,886 INFO L225 Difference]: With dead ends: 64 [2020-09-04 13:09:22,886 INFO L226 Difference]: Without dead ends: 60 [2020-09-04 13:09:22,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=338, Invalid=5824, Unknown=0, NotChecked=0, Total=6162 [2020-09-04 13:09:22,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-04 13:09:22,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-09-04 13:09:22,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-04 13:09:22,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-09-04 13:09:22,892 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 100 [2020-09-04 13:09:22,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:09:22,893 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-09-04 13:09:22,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-09-04 13:09:22,893 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-09-04 13:09:22,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-09-04 13:09:22,894 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:09:22,894 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] [2020-09-04 13:09:23,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-04 13:09:23,107 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:09:23,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:09:23,108 INFO L82 PathProgramCache]: Analyzing trace with hash -865344962, now seen corresponding path program 36 times [2020-09-04 13:09:23,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:09:23,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524364711] [2020-09-04 13:09:23,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:09:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:23,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:09:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:23,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:09:23,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:23,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:23,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:23,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:23,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-04 13:09:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:24,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:24,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:24,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:24,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:24,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:24,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:25,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:25,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:25,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:25,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-09-04 13:09:26,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524364711] [2020-09-04 13:09:26,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692155910] [2020-09-04 13:09:26,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:09:26,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-09-04 13:09:26,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:09:26,243 WARN L261 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2020-09-04 13:09:26,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:09:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 9 proven. 276 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2020-09-04 13:09:30,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:09:30,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 28] total 60 [2020-09-04 13:09:30,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086655887] [2020-09-04 13:09:30,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-09-04 13:09:30,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:09:30,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-09-04 13:09:30,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=3383, Unknown=0, NotChecked=0, Total=3540 [2020-09-04 13:09:30,562 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 60 states. [2020-09-04 13:09:37,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:09:37,708 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-09-04 13:09:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-04 13:09:37,712 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 107 [2020-09-04 13:09:37,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:09:37,713 INFO L225 Difference]: With dead ends: 64 [2020-09-04 13:09:37,714 INFO L226 Difference]: Without dead ends: 60 [2020-09-04 13:09:37,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=346, Invalid=6134, Unknown=0, NotChecked=0, Total=6480 [2020-09-04 13:09:37,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-04 13:09:37,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-09-04 13:09:37,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-04 13:09:37,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-09-04 13:09:37,721 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 107 [2020-09-04 13:09:37,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:09:37,721 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-09-04 13:09:37,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-09-04 13:09:37,721 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-09-04 13:09:37,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-09-04 13:09:37,722 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:09:37,723 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] [2020-09-04 13:09:37,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-04 13:09:37,939 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:09:37,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:09:37,939 INFO L82 PathProgramCache]: Analyzing trace with hash -564676919, now seen corresponding path program 37 times [2020-09-04 13:09:37,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:09:37,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791634380] [2020-09-04 13:09:37,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:09:37,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:38,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:09:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:38,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:09:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:38,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:38,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:38,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:38,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:38,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-04 13:09:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:39,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:39,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:39,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:39,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:40,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:40,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:40,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:40,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:41,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-09-04 13:09:41,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791634380] [2020-09-04 13:09:41,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714297805] [2020-09-04 13:09:41,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:09:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:41,463 WARN L261 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-09-04 13:09:41,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:09:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 9 proven. 317 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2020-09-04 13:09:46,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:09:46,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 28] total 62 [2020-09-04 13:09:46,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332405172] [2020-09-04 13:09:46,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-09-04 13:09:46,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:09:46,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-09-04 13:09:46,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3619, Unknown=0, NotChecked=0, Total=3782 [2020-09-04 13:09:46,145 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 62 states. [2020-09-04 13:09:53,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:09:53,822 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-09-04 13:09:53,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-04 13:09:53,826 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 114 [2020-09-04 13:09:53,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:09:53,828 INFO L225 Difference]: With dead ends: 64 [2020-09-04 13:09:53,828 INFO L226 Difference]: Without dead ends: 60 [2020-09-04 13:09:53,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=354, Invalid=6452, Unknown=0, NotChecked=0, Total=6806 [2020-09-04 13:09:53,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-04 13:09:53,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-09-04 13:09:53,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-04 13:09:53,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-09-04 13:09:53,836 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 114 [2020-09-04 13:09:53,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:09:53,836 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-09-04 13:09:53,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-09-04 13:09:53,836 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-09-04 13:09:53,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-04 13:09:53,837 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:09:53,838 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] [2020-09-04 13:09:54,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-04 13:09:54,054 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:09:54,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:09:54,054 INFO L82 PathProgramCache]: Analyzing trace with hash -173240844, now seen corresponding path program 38 times [2020-09-04 13:09:54,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:09:54,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500407537] [2020-09-04 13:09:54,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:09:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:54,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:09:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:54,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:09:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:54,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:54,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:54,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:54,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:55,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:55,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-04 13:09:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:55,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:55,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:55,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:56,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:56,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:56,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:56,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:57,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:57,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:57,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:57,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:09:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:09:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-09-04 13:09:57,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500407537] [2020-09-04 13:09:57,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701697095] [2020-09-04 13:09:57,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:09:58,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:09:58,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:09:58,021 WARN L261 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 193 conjunts are in the unsatisfiable core [2020-09-04 13:09:58,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:10:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 9 proven. 361 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2020-09-04 13:10:03,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:10:03,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 28] total 64 [2020-09-04 13:10:03,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797861920] [2020-09-04 13:10:03,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-09-04 13:10:03,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:10:03,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-09-04 13:10:03,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=3863, Unknown=0, NotChecked=0, Total=4032 [2020-09-04 13:10:03,064 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 64 states. [2020-09-04 13:10:11,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:10:11,177 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-09-04 13:10:11,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-04 13:10:11,180 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 121 [2020-09-04 13:10:11,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:10:11,182 INFO L225 Difference]: With dead ends: 64 [2020-09-04 13:10:11,182 INFO L226 Difference]: Without dead ends: 60 [2020-09-04 13:10:11,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=362, Invalid=6778, Unknown=0, NotChecked=0, Total=7140 [2020-09-04 13:10:11,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-04 13:10:11,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-09-04 13:10:11,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-04 13:10:11,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-09-04 13:10:11,189 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 121 [2020-09-04 13:10:11,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:10:11,190 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-09-04 13:10:11,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-09-04 13:10:11,190 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-09-04 13:10:11,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-09-04 13:10:11,200 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:10:11,200 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] [2020-09-04 13:10:11,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-04 13:10:11,415 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:10:11,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:10:11,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1022743187, now seen corresponding path program 39 times [2020-09-04 13:10:11,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:10:11,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96534598] [2020-09-04 13:10:11,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:10:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:11,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:10:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:11,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:10:11,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:11,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:11,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:11,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:12,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:12,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:12,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:12,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:12,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:12,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:13,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-04 13:10:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:13,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:13,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:13,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:13,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:14,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:14,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:14,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:15,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:15,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:15,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2020-09-04 13:10:16,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96534598] [2020-09-04 13:10:16,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661146200] [2020-09-04 13:10:16,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:10:16,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2020-09-04 13:10:16,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:10:16,282 WARN L261 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2020-09-04 13:10:16,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:10:21,913 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_div_47 already exists [2020-09-04 13:10:21,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:10:21,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-09-04 13:10:21,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932911331] [2020-09-04 13:10:21,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-09-04 13:10:21,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:10:21,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-09-04 13:10:21,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=4115, Unknown=0, NotChecked=0, Total=4290 [2020-09-04 13:10:21,916 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 42 states. [2020-09-04 13:10:29,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:10:29,692 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2020-09-04 13:10:29,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-04 13:10:29,697 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 128 [2020-09-04 13:10:29,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:10:29,698 INFO L225 Difference]: With dead ends: 62 [2020-09-04 13:10:29,698 INFO L226 Difference]: Without dead ends: 58 [2020-09-04 13:10:29,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=360, Invalid=7122, Unknown=0, NotChecked=0, Total=7482 [2020-09-04 13:10:29,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-04 13:10:29,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-09-04 13:10:29,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-04 13:10:29,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 73 transitions. [2020-09-04 13:10:29,704 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 73 transitions. Word has length 128 [2020-09-04 13:10:29,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:10:29,704 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 73 transitions. [2020-09-04 13:10:29,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-09-04 13:10:29,705 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 73 transitions. [2020-09-04 13:10:29,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-09-04 13:10:29,705 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:10:29,705 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] [2020-09-04 13:10:29,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:10:29,909 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:10:29,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:10:29,909 INFO L82 PathProgramCache]: Analyzing trace with hash -192564829, now seen corresponding path program 40 times [2020-09-04 13:10:29,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:10:29,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264581127] [2020-09-04 13:10:29,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:10:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:30,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:10:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:30,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:10:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:30,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:30,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:30,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:30,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:30,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:30,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:30,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:31,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:31,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:31,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-04 13:10:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:32,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:32,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:32,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:32,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:33,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 38 proven. 253 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-09-04 13:10:33,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264581127] [2020-09-04 13:10:33,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977050182] [2020-09-04 13:10:33,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:10:33,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:10:33,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:10:33,260 WARN L261 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2020-09-04 13:10:33,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:10:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 4 proven. 237 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2020-09-04 13:10:37,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:10:37,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 24] total 54 [2020-09-04 13:10:37,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514707399] [2020-09-04 13:10:37,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-09-04 13:10:37,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:10:37,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-09-04 13:10:37,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2719, Unknown=0, NotChecked=0, Total=2862 [2020-09-04 13:10:37,543 INFO L87 Difference]: Start difference. First operand 52 states and 73 transitions. Second operand 54 states. [2020-09-04 13:10:44,632 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-09-04 13:10:45,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:10:45,623 INFO L93 Difference]: Finished difference Result 64 states and 93 transitions. [2020-09-04 13:10:45,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-04 13:10:45,628 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 100 [2020-09-04 13:10:45,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:10:45,629 INFO L225 Difference]: With dead ends: 64 [2020-09-04 13:10:45,629 INFO L226 Difference]: Without dead ends: 58 [2020-09-04 13:10:45,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=310, Invalid=4946, Unknown=0, NotChecked=0, Total=5256 [2020-09-04 13:10:45,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-04 13:10:45,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-09-04 13:10:45,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-04 13:10:45,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 78 transitions. [2020-09-04 13:10:45,635 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 78 transitions. Word has length 100 [2020-09-04 13:10:45,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:10:45,636 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 78 transitions. [2020-09-04 13:10:45,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-09-04 13:10:45,636 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 78 transitions. [2020-09-04 13:10:45,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-09-04 13:10:45,636 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:10:45,637 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] [2020-09-04 13:10:45,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-04 13:10:45,838 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:10:45,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:10:45,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1339978551, now seen corresponding path program 41 times [2020-09-04 13:10:45,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:10:45,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905745479] [2020-09-04 13:10:45,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:10:45,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:46,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:10:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:46,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:10:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:46,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:46,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:46,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:46,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:47,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:47,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:47,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:47,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:48,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-04 13:10:48,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:48,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:48,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:49,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:49,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:49,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:49,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:49,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:50,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:50,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:51,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:10:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:10:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2020-09-04 13:10:51,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905745479] [2020-09-04 13:10:51,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563367602] [2020-09-04 13:10:51,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:10:51,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-09-04 13:10:51,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:10:51,697 WARN L261 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2020-09-04 13:10:51,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:10:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 8 proven. 406 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2020-09-04 13:10:58,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:10:58,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 26] total 64 [2020-09-04 13:10:58,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734602440] [2020-09-04 13:10:58,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-09-04 13:10:58,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:10:58,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-09-04 13:10:58,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3861, Unknown=0, NotChecked=0, Total=4032 [2020-09-04 13:10:58,063 INFO L87 Difference]: Start difference. First operand 54 states and 78 transitions. Second operand 64 states. [2020-09-04 13:11:08,000 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-09-04 13:11:08,575 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-09-04 13:11:08,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:11:08,752 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2020-09-04 13:11:08,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-04 13:11:08,757 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 128 [2020-09-04 13:11:08,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:11:08,758 INFO L225 Difference]: With dead ends: 62 [2020-09-04 13:11:08,758 INFO L226 Difference]: Without dead ends: 58 [2020-09-04 13:11:08,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=350, Invalid=6456, Unknown=0, NotChecked=0, Total=6806 [2020-09-04 13:11:08,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-04 13:11:08,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-09-04 13:11:08,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-04 13:11:08,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2020-09-04 13:11:08,765 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 128 [2020-09-04 13:11:08,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:11:08,765 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2020-09-04 13:11:08,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-09-04 13:11:08,765 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2020-09-04 13:11:08,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-09-04 13:11:08,766 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:11:08,766 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] [2020-09-04 13:11:08,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:11:08,969 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:11:08,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:11:08,969 INFO L82 PathProgramCache]: Analyzing trace with hash -893562198, now seen corresponding path program 42 times [2020-09-04 13:11:08,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:11:08,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933640125] [2020-09-04 13:11:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:11:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:09,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:11:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:09,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:11:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:09,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:09,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:09,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:09,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:10,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:10,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:10,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:10,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:11,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:11,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-04 13:11:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:11,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:12,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:12,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:12,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:13,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:13,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:14,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:14,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:14,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:15,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:15,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:15,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 60 proven. 486 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2020-09-04 13:11:15,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933640125] [2020-09-04 13:11:15,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790482406] [2020-09-04 13:11:15,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:11:15,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-09-04 13:11:15,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:11:15,514 WARN L261 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 217 conjunts are in the unsatisfiable core [2020-09-04 13:11:15,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:11:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 9 proven. 458 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2020-09-04 13:11:23,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:11:23,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 28] total 68 [2020-09-04 13:11:23,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542621350] [2020-09-04 13:11:23,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-09-04 13:11:23,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:11:23,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-09-04 13:11:23,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=4375, Unknown=0, NotChecked=0, Total=4556 [2020-09-04 13:11:23,099 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand 68 states. [2020-09-04 13:11:32,990 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-09-04 13:11:33,537 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-09-04 13:11:34,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:11:34,346 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2020-09-04 13:11:34,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-04 13:11:34,351 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 135 [2020-09-04 13:11:34,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:11:34,352 INFO L225 Difference]: With dead ends: 62 [2020-09-04 13:11:34,352 INFO L226 Difference]: Without dead ends: 58 [2020-09-04 13:11:34,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=378, Invalid=7454, Unknown=0, NotChecked=0, Total=7832 [2020-09-04 13:11:34,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-04 13:11:34,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-09-04 13:11:34,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-04 13:11:34,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 73 transitions. [2020-09-04 13:11:34,359 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 73 transitions. Word has length 135 [2020-09-04 13:11:34,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:11:34,360 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 73 transitions. [2020-09-04 13:11:34,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-09-04 13:11:34,360 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 73 transitions. [2020-09-04 13:11:34,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-09-04 13:11:34,361 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:11:34,361 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] [2020-09-04 13:11:34,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:11:34,576 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:11:34,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:11:34,577 INFO L82 PathProgramCache]: Analyzing trace with hash -992427037, now seen corresponding path program 43 times [2020-09-04 13:11:34,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:11:34,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376034773] [2020-09-04 13:11:34,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:11:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:34,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:11:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:34,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:11:34,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:35,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:35,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-04 13:11:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:35,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:35,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:35,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:35,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:35,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:36,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:36,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:36,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:37,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:37,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:37,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:38,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:38,719 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 21 proven. 255 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-09-04 13:11:38,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376034773] [2020-09-04 13:11:38,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755111460] [2020-09-04 13:11:38,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:11:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:38,783 WARN L261 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 153 conjunts are in the unsatisfiable core [2020-09-04 13:11:38,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:11:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 57 proven. 230 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-09-04 13:11:46,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:11:46,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 65 [2020-09-04 13:11:46,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988366036] [2020-09-04 13:11:46,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-09-04 13:11:46,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:11:46,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-09-04 13:11:46,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3987, Unknown=0, NotChecked=0, Total=4160 [2020-09-04 13:11:46,455 INFO L87 Difference]: Start difference. First operand 52 states and 73 transitions. Second operand 65 states. [2020-09-04 13:11:58,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:11:58,191 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2020-09-04 13:11:58,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-04 13:11:58,196 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 100 [2020-09-04 13:11:58,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:11:58,197 INFO L225 Difference]: With dead ends: 65 [2020-09-04 13:11:58,197 INFO L226 Difference]: Without dead ends: 61 [2020-09-04 13:11:58,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=431, Invalid=7579, Unknown=0, NotChecked=0, Total=8010 [2020-09-04 13:11:58,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-04 13:11:58,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-09-04 13:11:58,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 13:11:58,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-09-04 13:11:58,203 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 100 [2020-09-04 13:11:58,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:11:58,203 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-09-04 13:11:58,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-09-04 13:11:58,203 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-09-04 13:11:58,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-09-04 13:11:58,204 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:11:58,205 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] [2020-09-04 13:11:58,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-09-04 13:11:58,418 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:11:58,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:11:58,419 INFO L82 PathProgramCache]: Analyzing trace with hash -445760116, now seen corresponding path program 44 times [2020-09-04 13:11:58,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:11:58,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455875738] [2020-09-04 13:11:58,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:11:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:58,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:11:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:58,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:11:58,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:58,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:59,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:59,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-04 13:11:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:59,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:59,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:11:59,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:11:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:00,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:00,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:00,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:01,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:01,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:01,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:02,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:02,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-09-04 13:12:02,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455875738] [2020-09-04 13:12:02,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308389451] [2020-09-04 13:12:02,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:12:02,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:12:02,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:12:02,928 WARN L261 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2020-09-04 13:12:02,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:12:10,190 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 10 proven. 278 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2020-09-04 13:12:10,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:12:10,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 30] total 62 [2020-09-04 13:12:10,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810547528] [2020-09-04 13:12:10,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-09-04 13:12:10,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:12:10,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-09-04 13:12:10,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=3621, Unknown=0, NotChecked=0, Total=3782 [2020-09-04 13:12:10,195 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 62 states. [2020-09-04 13:12:21,462 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-09-04 13:12:22,026 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-09-04 13:12:22,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:12:22,351 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-09-04 13:12:22,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-04 13:12:22,357 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 107 [2020-09-04 13:12:22,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:12:22,358 INFO L225 Difference]: With dead ends: 67 [2020-09-04 13:12:22,358 INFO L226 Difference]: Without dead ends: 63 [2020-09-04 13:12:22,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=366, Invalid=6774, Unknown=0, NotChecked=0, Total=7140 [2020-09-04 13:12:22,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-04 13:12:22,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-09-04 13:12:22,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 13:12:22,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-09-04 13:12:22,365 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 107 [2020-09-04 13:12:22,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:12:22,365 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-09-04 13:12:22,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-09-04 13:12:22,366 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-09-04 13:12:22,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-09-04 13:12:22,367 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:12:22,367 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] [2020-09-04 13:12:22,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-04 13:12:22,583 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:12:22,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:12:22,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1805961107, now seen corresponding path program 45 times [2020-09-04 13:12:22,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:12:22,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026108292] [2020-09-04 13:12:22,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:12:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:22,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:12:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:22,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:12:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:22,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:23,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:23,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:23,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:23,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-04 13:12:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:24,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:24,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:24,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:24,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:25,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:25,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:25,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:26,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:26,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:27,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:27,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-09-04 13:12:27,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026108292] [2020-09-04 13:12:27,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84918395] [2020-09-04 13:12:27,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:12:27,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-09-04 13:12:27,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:12:27,959 WARN L261 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 180 conjunts are in the unsatisfiable core [2020-09-04 13:12:27,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:12:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 28 proven. 329 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-09-04 13:12:36,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:12:36,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 34] total 66 [2020-09-04 13:12:36,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124570473] [2020-09-04 13:12:36,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-09-04 13:12:36,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:12:36,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-09-04 13:12:36,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=4111, Unknown=0, NotChecked=0, Total=4290 [2020-09-04 13:12:36,546 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 66 states. [2020-09-04 13:12:47,733 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2020-09-04 13:12:48,142 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2020-09-04 13:12:48,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:12:48,994 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-09-04 13:12:49,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-04 13:12:49,001 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 114 [2020-09-04 13:12:49,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:12:49,002 INFO L225 Difference]: With dead ends: 67 [2020-09-04 13:12:49,002 INFO L226 Difference]: Without dead ends: 63 [2020-09-04 13:12:49,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=408, Invalid=7424, Unknown=0, NotChecked=0, Total=7832 [2020-09-04 13:12:49,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-04 13:12:49,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-09-04 13:12:49,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 13:12:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-09-04 13:12:49,009 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 114 [2020-09-04 13:12:49,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:12:49,010 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-09-04 13:12:49,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-09-04 13:12:49,010 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-09-04 13:12:49,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-04 13:12:49,011 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:12:49,011 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] [2020-09-04 13:12:49,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-09-04 13:12:49,226 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:12:49,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:12:49,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1954300290, now seen corresponding path program 46 times [2020-09-04 13:12:49,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:12:49,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361340292] [2020-09-04 13:12:49,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:12:49,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:49,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:12:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:49,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:12:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:49,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:49,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:50,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:50,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:50,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-04 13:12:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:50,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:51,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:51,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:51,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:52,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:52,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:52,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:52,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:52,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:53,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:53,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:54,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:54,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:12:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:12:55,157 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-09-04 13:12:55,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361340292] [2020-09-04 13:12:55,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290662647] [2020-09-04 13:12:55,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:12:55,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:12:55,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:12:55,230 WARN L261 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 193 conjunts are in the unsatisfiable core [2020-09-04 13:12:55,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:13:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 10 proven. 363 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2020-09-04 13:13:03,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:13:03,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 30] total 66 [2020-09-04 13:13:03,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762267034] [2020-09-04 13:13:03,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-09-04 13:13:03,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:13:03,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-09-04 13:13:03,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=4117, Unknown=0, NotChecked=0, Total=4290 [2020-09-04 13:13:03,668 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 66 states. [2020-09-04 13:13:15,750 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-09-04 13:13:16,196 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-09-04 13:13:17,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:13:17,255 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-09-04 13:13:17,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-04 13:13:17,262 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 121 [2020-09-04 13:13:17,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:13:17,264 INFO L225 Difference]: With dead ends: 67 [2020-09-04 13:13:17,264 INFO L226 Difference]: Without dead ends: 63 [2020-09-04 13:13:17,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=382, Invalid=7450, Unknown=0, NotChecked=0, Total=7832 [2020-09-04 13:13:17,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-04 13:13:17,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-09-04 13:13:17,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 13:13:17,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-09-04 13:13:17,270 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 121 [2020-09-04 13:13:17,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:13:17,270 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-09-04 13:13:17,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-09-04 13:13:17,271 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-09-04 13:13:17,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-09-04 13:13:17,271 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:13:17,271 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] [2020-09-04 13:13:17,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:13:17,472 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:13:17,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:13:17,473 INFO L82 PathProgramCache]: Analyzing trace with hash -970320905, now seen corresponding path program 47 times [2020-09-04 13:13:17,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:13:17,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902798698] [2020-09-04 13:13:17,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:13:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:17,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:13:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:17,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:13:17,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:17,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:17,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:18,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:18,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:18,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:18,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:18,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:19,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:19,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-04 13:13:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:19,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:20,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:20,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:20,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:20,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:21,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:21,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:21,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:22,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:22,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:22,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:23,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:24,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2020-09-04 13:13:24,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902798698] [2020-09-04 13:13:24,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322425563] [2020-09-04 13:13:24,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:13:24,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-09-04 13:13:24,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:13:24,572 WARN L261 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2020-09-04 13:13:24,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:13:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 10 proven. 410 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2020-09-04 13:13:34,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:13:34,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 30] total 68 [2020-09-04 13:13:34,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701114558] [2020-09-04 13:13:34,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-09-04 13:13:34,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:13:34,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-09-04 13:13:34,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=4377, Unknown=0, NotChecked=0, Total=4556 [2020-09-04 13:13:34,256 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 68 states. [2020-09-04 13:13:50,049 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-09-04 13:13:50,773 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-09-04 13:13:51,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:13:51,016 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-09-04 13:13:51,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-04 13:13:51,024 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 128 [2020-09-04 13:13:51,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:13:51,025 INFO L225 Difference]: With dead ends: 67 [2020-09-04 13:13:51,025 INFO L226 Difference]: Without dead ends: 63 [2020-09-04 13:13:51,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=390, Invalid=7800, Unknown=0, NotChecked=0, Total=8190 [2020-09-04 13:13:51,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-04 13:13:51,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-09-04 13:13:51,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 13:13:51,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-09-04 13:13:51,033 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 128 [2020-09-04 13:13:51,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:13:51,033 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-09-04 13:13:51,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-09-04 13:13:51,033 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-09-04 13:13:51,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-09-04 13:13:51,034 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:13:51,035 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] [2020-09-04 13:13:51,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-04 13:13:51,250 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:13:51,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:13:51,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1081659784, now seen corresponding path program 48 times [2020-09-04 13:13:51,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:13:51,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381136769] [2020-09-04 13:13:51,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:13:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:51,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:13:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:51,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:13:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:51,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:51,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:52,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:52,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:52,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:52,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:52,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:53,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:53,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-04 13:13:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:53,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:54,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:54,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:54,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:54,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:55,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:55,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:55,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:55,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:56,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:56,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:57,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:58,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:58,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:13:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:13:59,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 60 proven. 486 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2020-09-04 13:13:59,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381136769] [2020-09-04 13:13:59,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295383874] [2020-09-04 13:13:59,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:13:59,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-09-04 13:13:59,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:13:59,415 WARN L261 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 217 conjunts are in the unsatisfiable core [2020-09-04 13:13:59,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:14:10,392 INFO L721 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-09-04 13:14:10,399 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_div_39 already exists [2020-09-04 13:14:10,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:14:10,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-09-04 13:14:10,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383904745] [2020-09-04 13:14:10,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-09-04 13:14:10,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:14:10,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-09-04 13:14:10,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=4645, Unknown=0, NotChecked=0, Total=4830 [2020-09-04 13:14:10,402 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 44 states. [2020-09-04 13:14:13,851 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-09-04 13:14:14,429 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-09-04 13:14:15,403 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-09-04 13:14:15,812 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-09-04 13:14:16,384 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-09-04 13:14:24,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:14:24,286 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2020-09-04 13:14:24,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-04 13:14:24,294 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 135 [2020-09-04 13:14:24,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:14:24,295 INFO L225 Difference]: With dead ends: 67 [2020-09-04 13:14:24,295 INFO L226 Difference]: Without dead ends: 63 [2020-09-04 13:14:24,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=386, Invalid=8170, Unknown=0, NotChecked=0, Total=8556 [2020-09-04 13:14:24,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-04 13:14:24,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-09-04 13:14:24,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 13:14:24,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-09-04 13:14:24,302 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 135 [2020-09-04 13:14:24,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:14:24,303 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-09-04 13:14:24,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-09-04 13:14:24,303 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-09-04 13:14:24,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-09-04 13:14:24,306 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:14:24,306 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] [2020-09-04 13:14:24,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-04 13:14:24,522 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:14:24,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:14:24,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1602926209, now seen corresponding path program 49 times [2020-09-04 13:14:24,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:14:24,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779402058] [2020-09-04 13:14:24,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:14:24,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:14:24,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:14:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:14:24,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:14:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:14:25,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:14:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:14:25,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:14:25,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:14:25,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:14:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:14:25,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:14:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:14:25,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:14:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:14:26,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:14:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:14:27,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:14:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:14:27,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-04 13:14:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:14:27,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:14:27,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:14:28,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:14:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:14:28,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:14:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:14:29,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:14:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:14:29,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:14:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:14:30,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:14:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:14:31,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:14:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:14:31,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:14:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:14:32,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:14:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:14:33,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:14:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:14:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 64 proven. 542 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2020-09-04 13:14:33,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779402058] [2020-09-04 13:14:33,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978593362] [2020-09-04 13:14:33,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:14:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:14:33,802 WARN L261 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 229 conjunts are in the unsatisfiable core [2020-09-04 13:14:33,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:14:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 10 proven. 513 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2020-09-04 13:14:45,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:14:45,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 30] total 72 [2020-09-04 13:14:45,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941191440] [2020-09-04 13:14:45,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-09-04 13:14:45,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:14:45,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-09-04 13:14:45,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4921, Unknown=0, NotChecked=0, Total=5112 [2020-09-04 13:14:45,503 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 72 states. [2020-09-04 13:15:02,339 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-09-04 13:15:02,922 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-09-04 13:15:03,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:15:03,415 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2020-09-04 13:15:03,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-04 13:15:03,421 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2020-09-04 13:15:03,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:15:03,423 INFO L225 Difference]: With dead ends: 65 [2020-09-04 13:15:03,423 INFO L226 Difference]: Without dead ends: 61 [2020-09-04 13:15:03,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=406, Invalid=8524, Unknown=0, NotChecked=0, Total=8930 [2020-09-04 13:15:03,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-04 13:15:03,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2020-09-04 13:15:03,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-04 13:15:03,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 78 transitions. [2020-09-04 13:15:03,431 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 78 transitions. Word has length 142 [2020-09-04 13:15:03,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:15:03,431 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 78 transitions. [2020-09-04 13:15:03,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-09-04 13:15:03,432 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 78 transitions. [2020-09-04 13:15:03,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-04 13:15:03,433 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:15:03,433 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] [2020-09-04 13:15:03,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:15:03,647 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:15:03,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:15:03,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1116176261, now seen corresponding path program 50 times [2020-09-04 13:15:03,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:15:03,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049766959] [2020-09-04 13:15:03,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:15:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:03,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:15:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:03,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:15:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:04,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:04,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:04,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:04,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:05,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:05,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:05,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:06,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:06,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:07,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-04 13:15:07,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:07,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 1 proven. 182 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2020-09-04 13:15:07,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049766959] [2020-09-04 13:15:07,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070002246] [2020-09-04 13:15:07,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:15:07,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:15:07,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:15:07,901 WARN L261 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 129 conjunts are in the unsatisfiable core [2020-09-04 13:15:07,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:15:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-09-04 13:15:14,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:15:14,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31] total 55 [2020-09-04 13:15:14,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409509526] [2020-09-04 13:15:14,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-09-04 13:15:14,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:15:14,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-09-04 13:15:14,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2826, Unknown=0, NotChecked=0, Total=2970 [2020-09-04 13:15:14,442 INFO L87 Difference]: Start difference. First operand 55 states and 78 transitions. Second operand 55 states. [2020-09-04 13:15:23,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:15:23,124 INFO L93 Difference]: Finished difference Result 65 states and 97 transitions. [2020-09-04 13:15:23,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-04 13:15:23,130 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 86 [2020-09-04 13:15:23,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:15:23,132 INFO L225 Difference]: With dead ends: 65 [2020-09-04 13:15:23,132 INFO L226 Difference]: Without dead ends: 61 [2020-09-04 13:15:23,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=339, Invalid=5211, Unknown=0, NotChecked=0, Total=5550 [2020-09-04 13:15:23,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-04 13:15:23,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-09-04 13:15:23,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 13:15:23,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 90 transitions. [2020-09-04 13:15:23,138 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 90 transitions. Word has length 86 [2020-09-04 13:15:23,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:15:23,139 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 90 transitions. [2020-09-04 13:15:23,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-09-04 13:15:23,139 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 90 transitions. [2020-09-04 13:15:23,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-09-04 13:15:23,140 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:15:23,140 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] [2020-09-04 13:15:23,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-09-04 13:15:23,344 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:15:23,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:15:23,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1189861785, now seen corresponding path program 51 times [2020-09-04 13:15:23,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:15:23,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032910418] [2020-09-04 13:15:23,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:15:23,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:23,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:15:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:23,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:15:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:23,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:23,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:24,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:24,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:24,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:24,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:24,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:25,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:25,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:26,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-04 13:15:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:26,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:27,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:27,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:27,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:28,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:28,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:29,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 54 proven. 435 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2020-09-04 13:15:29,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032910418] [2020-09-04 13:15:29,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881377768] [2020-09-04 13:15:29,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:15:29,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2020-09-04 13:15:29,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:15:29,972 WARN L261 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2020-09-04 13:15:29,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:15:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 15 proven. 400 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2020-09-04 13:15:37,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:15:37,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 26] total 64 [2020-09-04 13:15:37,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656360438] [2020-09-04 13:15:37,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-09-04 13:15:37,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:15:37,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-09-04 13:15:37,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3861, Unknown=0, NotChecked=0, Total=4032 [2020-09-04 13:15:37,790 INFO L87 Difference]: Start difference. First operand 57 states and 90 transitions. Second operand 64 states. [2020-09-04 13:15:52,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:15:52,336 INFO L93 Difference]: Finished difference Result 67 states and 98 transitions. [2020-09-04 13:15:52,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-04 13:15:52,345 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 128 [2020-09-04 13:15:52,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:15:52,346 INFO L225 Difference]: With dead ends: 67 [2020-09-04 13:15:52,346 INFO L226 Difference]: Without dead ends: 61 [2020-09-04 13:15:52,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=362, Invalid=6778, Unknown=0, NotChecked=0, Total=7140 [2020-09-04 13:15:52,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-04 13:15:52,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-09-04 13:15:52,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 13:15:52,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 83 transitions. [2020-09-04 13:15:52,353 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 83 transitions. Word has length 128 [2020-09-04 13:15:52,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:15:52,353 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 83 transitions. [2020-09-04 13:15:52,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-09-04 13:15:52,354 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 83 transitions. [2020-09-04 13:15:52,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-09-04 13:15:52,355 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:15:52,355 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] [2020-09-04 13:15:52,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:15:52,567 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:15:52,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:15:52,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1270577827, now seen corresponding path program 52 times [2020-09-04 13:15:52,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:15:52,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818847056] [2020-09-04 13:15:52,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:15:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:52,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:15:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:52,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:15:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:53,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:53,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:53,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:54,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:54,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:54,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:54,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:54,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:54,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:55,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:56,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:56,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-04 13:15:56,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:57,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:57,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:57,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:58,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:58,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:59,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:00,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:16:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:01,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:16:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:02,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:16:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:03,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:16:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 64 proven. 542 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2020-09-04 13:16:04,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818847056] [2020-09-04 13:16:04,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750214075] [2020-09-04 13:16:04,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:16:04,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:16:04,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:16:04,090 WARN L261 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 229 conjunts are in the unsatisfiable core [2020-09-04 13:16:04,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:16:15,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 9 proven. 511 refuted. 0 times theorem prover too weak. 607 trivial. 0 not checked. [2020-09-04 13:16:15,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:16:15,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 28] total 70 [2020-09-04 13:16:15,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342889960] [2020-09-04 13:16:15,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-09-04 13:16:15,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:16:15,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-09-04 13:16:15,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=4643, Unknown=0, NotChecked=0, Total=4830 [2020-09-04 13:16:15,546 INFO L87 Difference]: Start difference. First operand 57 states and 83 transitions. Second operand 70 states. [2020-09-04 13:16:23,444 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-09-04 13:16:24,389 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-09-04 13:16:25,058 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-09-04 13:16:26,030 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-09-04 13:16:26,703 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-09-04 13:16:27,693 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-09-04 13:16:28,374 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-09-04 13:16:29,144 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-09-04 13:16:31,080 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-09-04 13:16:32,110 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-09-04 13:16:34,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:16:34,213 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2020-09-04 13:16:34,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-04 13:16:34,222 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 142 [2020-09-04 13:16:34,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:16:34,223 INFO L225 Difference]: With dead ends: 65 [2020-09-04 13:16:34,223 INFO L226 Difference]: Without dead ends: 61 [2020-09-04 13:16:34,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=386, Invalid=7804, Unknown=0, NotChecked=0, Total=8190 [2020-09-04 13:16:34,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-04 13:16:34,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-09-04 13:16:34,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 13:16:34,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2020-09-04 13:16:34,230 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 142 [2020-09-04 13:16:34,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:16:34,230 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2020-09-04 13:16:34,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-09-04 13:16:34,230 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2020-09-04 13:16:34,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-09-04 13:16:34,232 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:16:34,232 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] [2020-09-04 13:16:34,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-04 13:16:34,444 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:16:34,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:16:34,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1655069586, now seen corresponding path program 53 times [2020-09-04 13:16:34,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:16:34,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723873697] [2020-09-04 13:16:34,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:16:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:34,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:16:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:34,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:16:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:35,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:16:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:35,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:16:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:35,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:16:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:35,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:16:35,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:36,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:16:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:36,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:16:36,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:37,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:16:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:37,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:16:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:38,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-04 13:16:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:38,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:16:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:39,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:16:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:39,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:16:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:40,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:16:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:40,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:16:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:41,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:16:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:41,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:16:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:42,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:16:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:43,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:16:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:44,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:16:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:16:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 68 proven. 601 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2020-09-04 13:16:44,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723873697] [2020-09-04 13:16:44,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623307643] [2020-09-04 13:16:44,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:16:44,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2020-09-04 13:16:44,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:16:44,885 WARN L261 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 241 conjunts are in the unsatisfiable core [2020-09-04 13:16:44,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:16:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 10 proven. 569 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2020-09-04 13:16:58,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:16:58,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 30] total 74 [2020-09-04 13:16:58,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203896388] [2020-09-04 13:16:58,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-09-04 13:16:58,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:16:58,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-09-04 13:16:58,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=5205, Unknown=0, NotChecked=0, Total=5402 [2020-09-04 13:16:58,181 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand 74 states. [2020-09-04 13:16:59,659 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2020-09-04 13:17:01,001 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-09-04 13:17:01,720 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-09-04 13:17:02,729 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-09-04 13:17:03,441 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-09-04 13:17:04,764 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-09-04 13:17:05,520 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-09-04 13:17:06,544 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-09-04 13:17:07,139 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-09-04 13:17:08,195 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-09-04 13:17:08,953 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-09-04 13:17:10,094 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-09-04 13:17:10,940 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-09-04 13:17:12,158 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-09-04 13:17:12,769 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-09-04 13:17:13,695 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-09-04 13:17:15,172 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-09-04 13:17:16,088 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-09-04 13:17:17,310 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-09-04 13:17:17,919 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-09-04 13:17:21,942 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-09-04 13:17:22,614 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-09-04 13:17:23,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:17:23,363 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2020-09-04 13:17:23,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-04 13:17:23,379 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 149 [2020-09-04 13:17:23,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:17:23,380 INFO L225 Difference]: With dead ends: 65 [2020-09-04 13:17:23,381 INFO L226 Difference]: Without dead ends: 61 [2020-09-04 13:17:23,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=414, Invalid=8898, Unknown=0, NotChecked=0, Total=9312 [2020-09-04 13:17:23,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-04 13:17:23,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2020-09-04 13:17:23,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-04 13:17:23,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 78 transitions. [2020-09-04 13:17:23,387 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 78 transitions. Word has length 149 [2020-09-04 13:17:23,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:17:23,388 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 78 transitions. [2020-09-04 13:17:23,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-09-04 13:17:23,388 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 78 transitions. [2020-09-04 13:17:23,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-09-04 13:17:23,389 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:17:23,389 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] [2020-09-04 13:17:23,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-09-04 13:17:23,605 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:17:23,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:17:23,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1733939138, now seen corresponding path program 54 times [2020-09-04 13:17:23,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:17:23,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819931359] [2020-09-04 13:17:23,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:17:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:17:23,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:17:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:17:23,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:17:23,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:17:24,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:17:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:17:24,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-04 13:17:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:17:25,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:17:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:17:25,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:17:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:17:26,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:17:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:17:26,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:17:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:17:27,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:17:27,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:17:27,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:17:27,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:17:28,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:17:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:17:28,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:17:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:17:29,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:17:29,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:17:29,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:17:29,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:17:30,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:17:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:17:31,027 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 23 proven. 296 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2020-09-04 13:17:31,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819931359] [2020-09-04 13:17:31,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646963963] [2020-09-04 13:17:31,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:17:31,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-09-04 13:17:31,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:17:31,099 WARN L261 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 165 conjunts are in the unsatisfiable core [2020-09-04 13:17:31,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:17:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 62 proven. 269 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-09-04 13:17:45,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:17:45,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 69 [2020-09-04 13:17:45,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726073732] [2020-09-04 13:17:45,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-09-04 13:17:45,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:17:45,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-09-04 13:17:45,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=4509, Unknown=0, NotChecked=0, Total=4692 [2020-09-04 13:17:45,724 INFO L87 Difference]: Start difference. First operand 55 states and 78 transitions. Second operand 69 states. [2020-09-04 13:17:46,859 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2020-09-04 13:17:48,448 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2020-09-04 13:17:49,277 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-09-04 13:17:50,114 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-09-04 13:17:50,971 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2020-09-04 13:17:51,824 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2020-09-04 13:17:52,690 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-09-04 13:17:54,044 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-09-04 13:17:54,833 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-09-04 13:17:56,270 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-09-04 13:17:56,986 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-09-04 13:17:57,956 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-09-04 13:17:58,715 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-09-04 13:17:59,952 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-09-04 13:18:00,899 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-09-04 13:18:02,433 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-09-04 13:18:03,358 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-09-04 13:18:04,719 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-09-04 13:18:05,657 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-09-04 13:18:07,116 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-09-04 13:18:08,037 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-09-04 13:18:09,561 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-09-04 13:18:10,577 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-09-04 13:18:12,128 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-09-04 13:18:13,184 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2020-09-04 13:18:18,876 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2020-09-04 13:18:19,807 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2020-09-04 13:18:20,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:18:20,499 INFO L93 Difference]: Finished difference Result 68 states and 94 transitions. [2020-09-04 13:18:20,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-04 13:18:20,508 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 107 [2020-09-04 13:18:20,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:18:20,509 INFO L225 Difference]: With dead ends: 68 [2020-09-04 13:18:20,509 INFO L226 Difference]: Without dead ends: 64 [2020-09-04 13:18:20,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=463, Invalid=8657, Unknown=0, NotChecked=0, Total=9120 [2020-09-04 13:18:20,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-04 13:18:20,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2020-09-04 13:18:20,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-04 13:18:20,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 87 transitions. [2020-09-04 13:18:20,516 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 87 transitions. Word has length 107 [2020-09-04 13:18:20,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:18:20,517 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 87 transitions. [2020-09-04 13:18:20,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-09-04 13:18:20,517 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 87 transitions. [2020-09-04 13:18:20,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-09-04 13:18:20,518 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:18:20,518 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] [2020-09-04 13:18:20,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:18:20,731 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:18:20,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:18:20,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1739770251, now seen corresponding path program 55 times [2020-09-04 13:18:20,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:18:20,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313431102] [2020-09-04 13:18:20,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:18:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:18:21,187 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2020-09-04 13:18:21,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:18:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:18:21,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:18:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:18:21,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:18:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:18:21,919 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-09-04 13:18:22,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:18:22,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:18:22,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-04 13:18:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:18:23,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:18:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:18:23,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:18:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:18:24,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:18:24,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:18:25,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:18:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:18:26,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:18:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:18:27,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:18:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:18:28,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:18:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:18:29,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:18:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:18:31,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:18:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:18:32,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:18:32,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:18:32,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:18:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:18:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-09-04 13:18:33,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313431102] [2020-09-04 13:18:33,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017327284] [2020-09-04 13:18:33,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:18:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:18:33,545 WARN L261 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-09-04 13:18:33,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:18:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 11 proven. 321 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2020-09-04 13:18:50,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:18:50,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 32] total 66 [2020-09-04 13:18:50,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647790652] [2020-09-04 13:18:50,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-09-04 13:18:50,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:18:50,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-09-04 13:18:50,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=4119, Unknown=0, NotChecked=0, Total=4290 [2020-09-04 13:18:50,504 INFO L87 Difference]: Start difference. First operand 60 states and 87 transitions. Second operand 66 states.