/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:19:50,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:19:50,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:19:50,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:19:50,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:19:50,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:19:50,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:19:50,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:19:50,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:19:50,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:19:50,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:19:50,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:19:50,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:19:50,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:19:50,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:19:50,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:19:50,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:19:50,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:19:50,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:19:50,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:19:50,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:19:50,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:19:50,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:19:50,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:19:50,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:19:50,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:19:50,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:19:50,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:19:50,593 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:19:50,621 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:19:50,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:19:50,623 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:19:50,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:19:50,624 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:19:50,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:19:50,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:19:50,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:19:50,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:19:50,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:19:50,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:19:50,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:19:50,626 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:19:50,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:19:50,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:19:50,626 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:19:50,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:19:50,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:19:50,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:19:50,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:19:50,627 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:19:50,628 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:19:50,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:19:50,628 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:19:50,628 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:19:50,629 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:19:51,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:19:51,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:19:51,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:19:51,154 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:19:51,154 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:19:51,156 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2020-12-21 21:19:51,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ae0b5bcc/ff545a48ea4646a5a6a1f40598225136/FLAG4122da34d [2020-12-21 21:19:51,945 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:19:51,946 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2020-12-21 21:19:51,960 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ae0b5bcc/ff545a48ea4646a5a6a1f40598225136/FLAG4122da34d [2020-12-21 21:19:52,273 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ae0b5bcc/ff545a48ea4646a5a6a1f40598225136 [2020-12-21 21:19:52,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:19:52,278 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:19:52,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:19:52,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:19:52,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:19:52,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dc513f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52, skipping insertion in model container [2020-12-21 21:19:52,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,300 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:19:52,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:19:52,548 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i[832,845] [2020-12-21 21:19:52,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:19:52,607 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:19:52,622 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i[832,845] [2020-12-21 21:19:52,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:19:52,654 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:19:52,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52 WrapperNode [2020-12-21 21:19:52,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:19:52,656 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:19:52,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:19:52,657 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:19:52,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,689 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,732 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:19:52,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:19:52,736 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:19:52,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:19:52,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,803 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:19:52,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:19:52,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:19:52,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:19:52,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:19:52,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:19:52,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:19:52,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:19:52,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:19:52,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:19:52,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:19:52,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:19:53,375 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:19:53,376 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2020-12-21 21:19:53,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:19:53 BoogieIcfgContainer [2020-12-21 21:19:53,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:19:53,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:19:53,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:19:53,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:19:53,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:19:52" (1/3) ... [2020-12-21 21:19:53,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60159d91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:19:53, skipping insertion in model container [2020-12-21 21:19:53,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (2/3) ... [2020-12-21 21:19:53,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60159d91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:19:53, skipping insertion in model container [2020-12-21 21:19:53,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:19:53" (3/3) ... [2020-12-21 21:19:53,395 INFO L111 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-1.i [2020-12-21 21:19:53,402 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:19:53,408 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-21 21:19:53,430 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-21 21:19:53,456 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:19:53,456 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:19:53,456 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:19:53,456 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:19:53,456 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:19:53,457 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:19:53,457 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:19:53,457 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:19:53,471 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-12-21 21:19:53,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-21 21:19:53,477 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:53,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:53,482 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:53,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:53,489 INFO L82 PathProgramCache]: Analyzing trace with hash 212109301, now seen corresponding path program 1 times [2020-12-21 21:19:53,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:53,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150316845] [2020-12-21 21:19:53,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:53,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:19:53,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150316845] [2020-12-21 21:19:53,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:19:53,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:19:53,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62916508] [2020-12-21 21:19:53,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:19:53,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:53,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:19:53,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:19:53,801 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-12-21 21:19:53,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:53,940 INFO L93 Difference]: Finished difference Result 110 states and 165 transitions. [2020-12-21 21:19:53,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:19:53,942 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-21 21:19:53,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:53,954 INFO L225 Difference]: With dead ends: 110 [2020-12-21 21:19:53,955 INFO L226 Difference]: Without dead ends: 67 [2020-12-21 21:19:53,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:19:53,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-21 21:19:54,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 36. [2020-12-21 21:19:54,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 21:19:54,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-12-21 21:19:54,017 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 8 [2020-12-21 21:19:54,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:54,018 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-12-21 21:19:54,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:19:54,018 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-12-21 21:19:54,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 21:19:54,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:54,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:54,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:19:54,022 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:54,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:54,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1436007159, now seen corresponding path program 1 times [2020-12-21 21:19:54,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:54,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524226549] [2020-12-21 21:19:54,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:19:54,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524226549] [2020-12-21 21:19:54,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053117798] [2020-12-21 21:19:54,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:19:54,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:54,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:19:54,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:54,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:19:54,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45491695] [2020-12-21 21:19:54,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:19:54,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:54,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:19:54,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:54,278 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 5 states. [2020-12-21 21:19:54,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:54,406 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2020-12-21 21:19:54,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:19:54,407 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-21 21:19:54,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:54,413 INFO L225 Difference]: With dead ends: 130 [2020-12-21 21:19:54,414 INFO L226 Difference]: Without dead ends: 99 [2020-12-21 21:19:54,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:54,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-21 21:19:54,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 38. [2020-12-21 21:19:54,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-21 21:19:54,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2020-12-21 21:19:54,435 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 10 [2020-12-21 21:19:54,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:54,435 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2020-12-21 21:19:54,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:19:54,436 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2020-12-21 21:19:54,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 21:19:54,438 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:54,438 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:54,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:19:54,653 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:54,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:54,655 INFO L82 PathProgramCache]: Analyzing trace with hash 780809593, now seen corresponding path program 2 times [2020-12-21 21:19:54,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:54,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850679800] [2020-12-21 21:19:54,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:19:54,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850679800] [2020-12-21 21:19:54,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:19:54,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:19:54,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22783228] [2020-12-21 21:19:54,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:19:54,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:54,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:19:54,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:19:54,740 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 4 states. [2020-12-21 21:19:54,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:54,800 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2020-12-21 21:19:54,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:19:54,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-21 21:19:54,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:54,805 INFO L225 Difference]: With dead ends: 72 [2020-12-21 21:19:54,805 INFO L226 Difference]: Without dead ends: 40 [2020-12-21 21:19:54,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:19:54,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-21 21:19:54,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-12-21 21:19:54,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-21 21:19:54,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2020-12-21 21:19:54,815 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 12 [2020-12-21 21:19:54,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:54,816 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2020-12-21 21:19:54,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:19:54,816 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2020-12-21 21:19:54,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 21:19:54,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:54,818 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:54,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-21 21:19:54,818 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:54,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:54,819 INFO L82 PathProgramCache]: Analyzing trace with hash 27211895, now seen corresponding path program 1 times [2020-12-21 21:19:54,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:54,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561972620] [2020-12-21 21:19:54,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:19:54,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561972620] [2020-12-21 21:19:54,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:19:54,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:19:54,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115444077] [2020-12-21 21:19:54,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:19:54,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:54,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:19:54,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:19:54,871 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 3 states. [2020-12-21 21:19:54,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:54,919 INFO L93 Difference]: Finished difference Result 78 states and 100 transitions. [2020-12-21 21:19:54,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:19:54,922 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-12-21 21:19:54,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:54,923 INFO L225 Difference]: With dead ends: 78 [2020-12-21 21:19:54,923 INFO L226 Difference]: Without dead ends: 51 [2020-12-21 21:19:54,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:19:54,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-21 21:19:54,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-12-21 21:19:54,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-21 21:19:54,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-12-21 21:19:54,938 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 25 [2020-12-21 21:19:54,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:54,939 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-12-21 21:19:54,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:19:54,939 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-12-21 21:19:54,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 21:19:54,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:54,940 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:54,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-21 21:19:54,942 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:54,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:54,943 INFO L82 PathProgramCache]: Analyzing trace with hash 676355061, now seen corresponding path program 1 times [2020-12-21 21:19:54,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:54,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975389245] [2020-12-21 21:19:54,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:19:55,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975389245] [2020-12-21 21:19:55,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653851280] [2020-12-21 21:19:55,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:55,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:19:55,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:55,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:19:55,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:55,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-21 21:19:55,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742804197] [2020-12-21 21:19:55,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:19:55,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:55,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:19:55,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:19:55,203 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 7 states. [2020-12-21 21:19:55,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:55,330 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2020-12-21 21:19:55,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:19:55,330 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-12-21 21:19:55,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:55,331 INFO L225 Difference]: With dead ends: 130 [2020-12-21 21:19:55,331 INFO L226 Difference]: Without dead ends: 97 [2020-12-21 21:19:55,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:19:55,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-21 21:19:55,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 54. [2020-12-21 21:19:55,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 21:19:55,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2020-12-21 21:19:55,341 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 27 [2020-12-21 21:19:55,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:55,341 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2020-12-21 21:19:55,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:19:55,342 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2020-12-21 21:19:55,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-21 21:19:55,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:55,343 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:55,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:55,558 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:55,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:55,559 INFO L82 PathProgramCache]: Analyzing trace with hash -719529317, now seen corresponding path program 1 times [2020-12-21 21:19:55,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:55,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950736275] [2020-12-21 21:19:55,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-21 21:19:55,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950736275] [2020-12-21 21:19:55,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:19:55,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:19:55,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045681507] [2020-12-21 21:19:55,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:19:55,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:55,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:19:55,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:19:55,669 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand 4 states. [2020-12-21 21:19:55,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:55,687 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2020-12-21 21:19:55,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:19:55,688 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-12-21 21:19:55,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:55,688 INFO L225 Difference]: With dead ends: 72 [2020-12-21 21:19:55,689 INFO L226 Difference]: Without dead ends: 46 [2020-12-21 21:19:55,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:55,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-21 21:19:55,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-21 21:19:55,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 21:19:55,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-12-21 21:19:55,695 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 37 [2020-12-21 21:19:55,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:55,696 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-12-21 21:19:55,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:19:55,696 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-12-21 21:19:55,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-21 21:19:55,697 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:55,698 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:55,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-21 21:19:55,698 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:55,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:55,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1020039433, now seen corresponding path program 2 times [2020-12-21 21:19:55,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:55,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848101615] [2020-12-21 21:19:55,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,776 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 21:19:55,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848101615] [2020-12-21 21:19:55,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771383751] [2020-12-21 21:19:55,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:55,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:19:55,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:55,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:19:55,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:55,934 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 21:19:55,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:55,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:19:55,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502052504] [2020-12-21 21:19:55,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:19:55,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:55,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:19:55,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:19:55,939 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 7 states. [2020-12-21 21:19:56,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:56,001 INFO L93 Difference]: Finished difference Result 118 states and 138 transitions. [2020-12-21 21:19:56,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:19:56,001 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-12-21 21:19:56,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:56,002 INFO L225 Difference]: With dead ends: 118 [2020-12-21 21:19:56,002 INFO L226 Difference]: Without dead ends: 81 [2020-12-21 21:19:56,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:19:56,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-21 21:19:56,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 48. [2020-12-21 21:19:56,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 21:19:56,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-12-21 21:19:56,010 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 38 [2020-12-21 21:19:56,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:56,011 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-12-21 21:19:56,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:19:56,011 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-12-21 21:19:56,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-21 21:19:56,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:56,012 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:56,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:56,226 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:56,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:56,228 INFO L82 PathProgramCache]: Analyzing trace with hash 607523979, now seen corresponding path program 3 times [2020-12-21 21:19:56,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:56,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066022311] [2020-12-21 21:19:56,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:56,319 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 21:19:56,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066022311] [2020-12-21 21:19:56,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929848106] [2020-12-21 21:19:56,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:56,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:19:56,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:56,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:19:56,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-21 21:19:56,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:56,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-12-21 21:19:56,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100599364] [2020-12-21 21:19:56,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:19:56,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:56,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:19:56,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:19:56,470 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 10 states. [2020-12-21 21:19:56,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:56,598 INFO L93 Difference]: Finished difference Result 148 states and 175 transitions. [2020-12-21 21:19:56,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:19:56,599 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-12-21 21:19:56,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:56,600 INFO L225 Difference]: With dead ends: 148 [2020-12-21 21:19:56,600 INFO L226 Difference]: Without dead ends: 111 [2020-12-21 21:19:56,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:19:56,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-21 21:19:56,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 61. [2020-12-21 21:19:56,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-21 21:19:56,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2020-12-21 21:19:56,609 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 40 [2020-12-21 21:19:56,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:56,609 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2020-12-21 21:19:56,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:19:56,609 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2020-12-21 21:19:56,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 21:19:56,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:56,611 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:56,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:56,825 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:56,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:56,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1656109653, now seen corresponding path program 4 times [2020-12-21 21:19:56,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:56,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021915249] [2020-12-21 21:19:56,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:56,951 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-21 21:19:56,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021915249] [2020-12-21 21:19:56,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767339771] [2020-12-21 21:19:56,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:57,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:19:57,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:57,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:19:57,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-21 21:19:57,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:57,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 21:19:57,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40417590] [2020-12-21 21:19:57,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:19:57,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:57,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:19:57,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:19:57,130 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 9 states. [2020-12-21 21:19:57,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:57,206 INFO L93 Difference]: Finished difference Result 160 states and 186 transitions. [2020-12-21 21:19:57,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:19:57,206 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-12-21 21:19:57,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:57,207 INFO L225 Difference]: With dead ends: 160 [2020-12-21 21:19:57,207 INFO L226 Difference]: Without dead ends: 112 [2020-12-21 21:19:57,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:19:57,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-21 21:19:57,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 63. [2020-12-21 21:19:57,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-21 21:19:57,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-12-21 21:19:57,216 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 51 [2020-12-21 21:19:57,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:57,216 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-12-21 21:19:57,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:19:57,216 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-12-21 21:19:57,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-21 21:19:57,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:57,217 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:57,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:57,432 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:57,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:57,434 INFO L82 PathProgramCache]: Analyzing trace with hash -112360087, now seen corresponding path program 5 times [2020-12-21 21:19:57,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:57,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650467341] [2020-12-21 21:19:57,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:57,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-21 21:19:57,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650467341] [2020-12-21 21:19:57,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449610598] [2020-12-21 21:19:57,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:57,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-21 21:19:57,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:57,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:19:57,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:19:57,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:57,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2020-12-21 21:19:57,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117522956] [2020-12-21 21:19:57,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:19:57,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:57,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:19:57,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:19:57,889 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 13 states. [2020-12-21 21:19:58,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:58,369 INFO L93 Difference]: Finished difference Result 251 states and 291 transitions. [2020-12-21 21:19:58,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 21:19:58,369 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-12-21 21:19:58,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:58,375 INFO L225 Difference]: With dead ends: 251 [2020-12-21 21:19:58,375 INFO L226 Difference]: Without dead ends: 203 [2020-12-21 21:19:58,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 21:19:58,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-12-21 21:19:58,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 67. [2020-12-21 21:19:58,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-21 21:19:58,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2020-12-21 21:19:58,388 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 53 [2020-12-21 21:19:58,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:58,388 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2020-12-21 21:19:58,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:19:58,389 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2020-12-21 21:19:58,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-21 21:19:58,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:58,390 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:58,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:58,604 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:58,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:58,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1113830631, now seen corresponding path program 1 times [2020-12-21 21:19:58,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:58,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770846539] [2020-12-21 21:19:58,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:58,697 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-21 21:19:58,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770846539] [2020-12-21 21:19:58,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906787914] [2020-12-21 21:19:58,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:58,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:19:58,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-21 21:19:58,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:58,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:19:58,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021608318] [2020-12-21 21:19:58,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:19:58,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:58,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:19:58,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:19:58,860 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 11 states. [2020-12-21 21:19:58,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:58,960 INFO L93 Difference]: Finished difference Result 184 states and 212 transitions. [2020-12-21 21:19:58,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:19:58,961 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-12-21 21:19:58,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:58,962 INFO L225 Difference]: With dead ends: 184 [2020-12-21 21:19:58,962 INFO L226 Difference]: Without dead ends: 134 [2020-12-21 21:19:58,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:19:58,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-21 21:19:58,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 69. [2020-12-21 21:19:58,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-21 21:19:58,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2020-12-21 21:19:58,971 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 55 [2020-12-21 21:19:58,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:58,971 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2020-12-21 21:19:58,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:19:58,971 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2020-12-21 21:19:58,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-21 21:19:58,972 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:58,973 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:59,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:59,187 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:59,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:59,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1927636389, now seen corresponding path program 2 times [2020-12-21 21:19:59,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:59,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362498801] [2020-12-21 21:19:59,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-21 21:19:59,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362498801] [2020-12-21 21:19:59,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674307678] [2020-12-21 21:19:59,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:59,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:19:59,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:59,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:19:59,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-21 21:19:59,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:59,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:19:59,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661833638] [2020-12-21 21:19:59,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:19:59,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:59,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:19:59,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:19:59,474 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand 12 states. [2020-12-21 21:19:59,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:59,589 INFO L93 Difference]: Finished difference Result 194 states and 223 transitions. [2020-12-21 21:19:59,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:19:59,589 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-12-21 21:19:59,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:59,590 INFO L225 Difference]: With dead ends: 194 [2020-12-21 21:19:59,591 INFO L226 Difference]: Without dead ends: 144 [2020-12-21 21:19:59,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:19:59,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-21 21:19:59,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 71. [2020-12-21 21:19:59,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-21 21:19:59,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2020-12-21 21:19:59,599 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 57 [2020-12-21 21:19:59,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:59,600 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2020-12-21 21:19:59,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:19:59,600 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2020-12-21 21:19:59,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 21:19:59,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:59,601 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:59,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-21 21:19:59,811 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:59,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:59,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1984045341, now seen corresponding path program 3 times [2020-12-21 21:19:59,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:59,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425583937] [2020-12-21 21:19:59,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-21 21:19:59,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425583937] [2020-12-21 21:19:59,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956535710] [2020-12-21 21:19:59,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:00,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 21:20:00,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:00,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:20:00,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-12-21 21:20:00,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:00,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2020-12-21 21:20:00,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807897157] [2020-12-21 21:20:00,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 21:20:00,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:00,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 21:20:00,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:20:00,151 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand 16 states. [2020-12-21 21:20:00,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:00,357 INFO L93 Difference]: Finished difference Result 226 states and 262 transitions. [2020-12-21 21:20:00,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:20:00,357 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2020-12-21 21:20:00,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:00,358 INFO L225 Difference]: With dead ends: 226 [2020-12-21 21:20:00,359 INFO L226 Difference]: Without dead ends: 176 [2020-12-21 21:20:00,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:20:00,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-21 21:20:00,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 85. [2020-12-21 21:20:00,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-21 21:20:00,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-12-21 21:20:00,369 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 59 [2020-12-21 21:20:00,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:00,369 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-12-21 21:20:00,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 21:20:00,369 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-12-21 21:20:00,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-21 21:20:00,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:00,370 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:00,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:00,584 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:00,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:00,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1415133969, now seen corresponding path program 4 times [2020-12-21 21:20:00,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:00,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119994089] [2020-12-21 21:20:00,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-21 21:20:00,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119994089] [2020-12-21 21:20:00,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837009884] [2020-12-21 21:20:00,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:00,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:00,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:00,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:20:00,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-21 21:20:00,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:00,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:20:00,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366226695] [2020-12-21 21:20:00,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:20:00,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:00,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:20:00,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:20:00,933 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 14 states. [2020-12-21 21:20:01,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:01,069 INFO L93 Difference]: Finished difference Result 238 states and 273 transitions. [2020-12-21 21:20:01,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:20:01,069 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 70 [2020-12-21 21:20:01,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:01,071 INFO L225 Difference]: With dead ends: 238 [2020-12-21 21:20:01,071 INFO L226 Difference]: Without dead ends: 176 [2020-12-21 21:20:01,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:20:01,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-21 21:20:01,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 87. [2020-12-21 21:20:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-21 21:20:01,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-12-21 21:20:01,087 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 70 [2020-12-21 21:20:01,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:01,087 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-12-21 21:20:01,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:20:01,087 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-12-21 21:20:01,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-21 21:20:01,088 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:01,088 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:01,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:01,304 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:01,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:01,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1534839149, now seen corresponding path program 5 times [2020-12-21 21:20:01,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:01,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917141658] [2020-12-21 21:20:01,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-21 21:20:01,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917141658] [2020-12-21 21:20:01,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080101339] [2020-12-21 21:20:01,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:02,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-21 21:20:02,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:02,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:20:02,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-12-21 21:20:02,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:02,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2020-12-21 21:20:02,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564606302] [2020-12-21 21:20:02,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 21:20:02,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:02,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 21:20:02,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:20:02,609 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 19 states. [2020-12-21 21:20:02,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:02,873 INFO L93 Difference]: Finished difference Result 270 states and 312 transitions. [2020-12-21 21:20:02,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 21:20:02,873 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 72 [2020-12-21 21:20:02,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:02,879 INFO L225 Difference]: With dead ends: 270 [2020-12-21 21:20:02,879 INFO L226 Difference]: Without dead ends: 208 [2020-12-21 21:20:02,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=206, Invalid=346, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:20:02,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-21 21:20:02,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 101. [2020-12-21 21:20:02,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-21 21:20:02,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2020-12-21 21:20:02,903 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 72 [2020-12-21 21:20:02,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:02,904 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2020-12-21 21:20:02,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 21:20:02,904 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2020-12-21 21:20:02,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-21 21:20:02,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:02,905 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:03,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 21:20:03,118 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:03,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:03,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1835696295, now seen corresponding path program 6 times [2020-12-21 21:20:03,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:03,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858183971] [2020-12-21 21:20:03,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:03,259 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-12-21 21:20:03,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858183971] [2020-12-21 21:20:03,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534469792] [2020-12-21 21:20:03,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:04,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-21 21:20:04,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:04,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:20:04,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-21 21:20:04,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:04,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2020-12-21 21:20:04,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33516295] [2020-12-21 21:20:04,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 21:20:04,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:04,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 21:20:04,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:20:04,261 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand 21 states. [2020-12-21 21:20:04,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:04,536 INFO L93 Difference]: Finished difference Result 304 states and 351 transitions. [2020-12-21 21:20:04,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 21:20:04,537 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 83 [2020-12-21 21:20:04,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:04,538 INFO L225 Difference]: With dead ends: 304 [2020-12-21 21:20:04,539 INFO L226 Difference]: Without dead ends: 230 [2020-12-21 21:20:04,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=258, Invalid=444, Unknown=0, NotChecked=0, Total=702 [2020-12-21 21:20:04,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-12-21 21:20:04,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 115. [2020-12-21 21:20:04,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-21 21:20:04,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 131 transitions. [2020-12-21 21:20:04,550 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 131 transitions. Word has length 83 [2020-12-21 21:20:04,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:04,551 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 131 transitions. [2020-12-21 21:20:04,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 21:20:04,551 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 131 transitions. [2020-12-21 21:20:04,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-21 21:20:04,552 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:04,552 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:04,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 21:20:04,767 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:04,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:04,768 INFO L82 PathProgramCache]: Analyzing trace with hash 2084179419, now seen corresponding path program 7 times [2020-12-21 21:20:04,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:04,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303552376] [2020-12-21 21:20:04,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-12-21 21:20:04,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303552376] [2020-12-21 21:20:04,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120052734] [2020-12-21 21:20:04,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:05,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:20:05,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-12-21 21:20:05,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:05,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 21:20:05,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370169752] [2020-12-21 21:20:05,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:20:05,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:05,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:20:05,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:20:05,151 INFO L87 Difference]: Start difference. First operand 115 states and 131 transitions. Second operand 17 states. [2020-12-21 21:20:05,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:05,316 INFO L93 Difference]: Finished difference Result 316 states and 362 transitions. [2020-12-21 21:20:05,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:20:05,317 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 94 [2020-12-21 21:20:05,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:05,318 INFO L225 Difference]: With dead ends: 316 [2020-12-21 21:20:05,318 INFO L226 Difference]: Without dead ends: 230 [2020-12-21 21:20:05,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:20:05,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-12-21 21:20:05,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 117. [2020-12-21 21:20:05,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-21 21:20:05,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 133 transitions. [2020-12-21 21:20:05,331 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 133 transitions. Word has length 94 [2020-12-21 21:20:05,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:05,331 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 133 transitions. [2020-12-21 21:20:05,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:20:05,331 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 133 transitions. [2020-12-21 21:20:05,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-21 21:20:05,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:05,332 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:05,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:20:05,540 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:05,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:05,541 INFO L82 PathProgramCache]: Analyzing trace with hash -362077347, now seen corresponding path program 8 times [2020-12-21 21:20:05,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:05,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592059494] [2020-12-21 21:20:05,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-12-21 21:20:05,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592059494] [2020-12-21 21:20:05,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918118663] [2020-12-21 21:20:05,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:05,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:05,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:05,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:20:05,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-12-21 21:20:05,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:05,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-21 21:20:05,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750367184] [2020-12-21 21:20:06,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:20:06,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:06,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:20:06,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:20:06,001 INFO L87 Difference]: Start difference. First operand 117 states and 133 transitions. Second operand 18 states. [2020-12-21 21:20:06,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:06,177 INFO L93 Difference]: Finished difference Result 326 states and 373 transitions. [2020-12-21 21:20:06,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:20:06,177 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 96 [2020-12-21 21:20:06,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:06,179 INFO L225 Difference]: With dead ends: 326 [2020-12-21 21:20:06,179 INFO L226 Difference]: Without dead ends: 240 [2020-12-21 21:20:06,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:20:06,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-12-21 21:20:06,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 119. [2020-12-21 21:20:06,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-21 21:20:06,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 135 transitions. [2020-12-21 21:20:06,193 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 135 transitions. Word has length 96 [2020-12-21 21:20:06,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:06,193 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 135 transitions. [2020-12-21 21:20:06,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:20:06,193 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 135 transitions. [2020-12-21 21:20:06,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-21 21:20:06,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:06,194 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:06,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:06,409 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:06,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:06,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1867718561, now seen corresponding path program 9 times [2020-12-21 21:20:06,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:06,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350815618] [2020-12-21 21:20:06,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-12-21 21:20:06,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350815618] [2020-12-21 21:20:06,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378457354] [2020-12-21 21:20:06,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:07,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-21 21:20:07,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:07,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:20:07,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:07,320 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-12-21 21:20:07,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:07,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2020-12-21 21:20:07,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941641451] [2020-12-21 21:20:07,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-21 21:20:07,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:07,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-21 21:20:07,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-12-21 21:20:07,325 INFO L87 Difference]: Start difference. First operand 119 states and 135 transitions. Second operand 25 states. [2020-12-21 21:20:07,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:07,669 INFO L93 Difference]: Finished difference Result 358 states and 412 transitions. [2020-12-21 21:20:07,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 21:20:07,669 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 98 [2020-12-21 21:20:07,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:07,671 INFO L225 Difference]: With dead ends: 358 [2020-12-21 21:20:07,671 INFO L226 Difference]: Without dead ends: 272 [2020-12-21 21:20:07,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=363, Invalid=629, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:20:07,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-12-21 21:20:07,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 133. [2020-12-21 21:20:07,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-21 21:20:07,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 151 transitions. [2020-12-21 21:20:07,686 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 151 transitions. Word has length 98 [2020-12-21 21:20:07,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:07,687 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 151 transitions. [2020-12-21 21:20:07,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-21 21:20:07,687 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 151 transitions. [2020-12-21 21:20:07,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-21 21:20:07,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:07,690 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:07,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:07,898 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:07,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:07,899 INFO L82 PathProgramCache]: Analyzing trace with hash -481778419, now seen corresponding path program 10 times [2020-12-21 21:20:07,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:07,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562497839] [2020-12-21 21:20:07,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:08,158 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-12-21 21:20:08,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562497839] [2020-12-21 21:20:08,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495288834] [2020-12-21 21:20:08,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:08,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:08,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:08,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:20:08,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-12-21 21:20:08,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:08,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-21 21:20:08,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246168622] [2020-12-21 21:20:08,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 21:20:08,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:08,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 21:20:08,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:20:08,453 INFO L87 Difference]: Start difference. First operand 133 states and 151 transitions. Second operand 20 states. [2020-12-21 21:20:08,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:08,671 INFO L93 Difference]: Finished difference Result 370 states and 423 transitions. [2020-12-21 21:20:08,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 21:20:08,671 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 109 [2020-12-21 21:20:08,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:08,673 INFO L225 Difference]: With dead ends: 370 [2020-12-21 21:20:08,673 INFO L226 Difference]: Without dead ends: 272 [2020-12-21 21:20:08,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:20:08,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-12-21 21:20:08,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 135. [2020-12-21 21:20:08,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-21 21:20:08,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 153 transitions. [2020-12-21 21:20:08,710 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 153 transitions. Word has length 109 [2020-12-21 21:20:08,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:08,711 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 153 transitions. [2020-12-21 21:20:08,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 21:20:08,711 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 153 transitions. [2020-12-21 21:20:08,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-21 21:20:08,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:08,712 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:08,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:08,927 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:08,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:08,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1338139829, now seen corresponding path program 11 times [2020-12-21 21:20:08,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:08,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054706685] [2020-12-21 21:20:08,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-12-21 21:20:09,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054706685] [2020-12-21 21:20:09,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833623774] [2020-12-21 21:20:09,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:54,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-21 21:20:54,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:54,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 21:20:54,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-12-21 21:20:54,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:54,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-21 21:20:54,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027810290] [2020-12-21 21:20:54,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 21:20:54,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:54,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 21:20:54,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:20:54,877 INFO L87 Difference]: Start difference. First operand 135 states and 153 transitions. Second operand 21 states. [2020-12-21 21:20:55,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:55,147 INFO L93 Difference]: Finished difference Result 380 states and 434 transitions. [2020-12-21 21:20:55,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 21:20:55,148 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 111 [2020-12-21 21:20:55,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:55,149 INFO L225 Difference]: With dead ends: 380 [2020-12-21 21:20:55,149 INFO L226 Difference]: Without dead ends: 282 [2020-12-21 21:20:55,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:20:55,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-12-21 21:20:55,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 137. [2020-12-21 21:20:55,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-21 21:20:55,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 155 transitions. [2020-12-21 21:20:55,164 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 155 transitions. Word has length 111 [2020-12-21 21:20:55,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:55,164 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 155 transitions. [2020-12-21 21:20:55,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 21:20:55,164 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 155 transitions. [2020-12-21 21:20:55,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-21 21:20:55,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:55,166 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:55,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 21:20:55,366 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:55,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:55,367 INFO L82 PathProgramCache]: Analyzing trace with hash 332265993, now seen corresponding path program 12 times [2020-12-21 21:20:55,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:55,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944618196] [2020-12-21 21:20:55,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-12-21 21:20:55,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944618196] [2020-12-21 21:20:55,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821954909] [2020-12-21 21:20:55,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:01,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-21 21:21:01,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:01,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:21:01,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2020-12-21 21:21:01,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:01,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10] total 29 [2020-12-21 21:21:01,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362394173] [2020-12-21 21:21:01,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 21:21:01,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:01,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 21:21:01,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:21:01,468 INFO L87 Difference]: Start difference. First operand 137 states and 155 transitions. Second operand 29 states. [2020-12-21 21:21:01,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:01,966 INFO L93 Difference]: Finished difference Result 412 states and 473 transitions. [2020-12-21 21:21:01,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-21 21:21:01,966 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 113 [2020-12-21 21:21:01,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:01,968 INFO L225 Difference]: With dead ends: 412 [2020-12-21 21:21:01,968 INFO L226 Difference]: Without dead ends: 314 [2020-12-21 21:21:01,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=846, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 21:21:01,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-12-21 21:21:01,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 151. [2020-12-21 21:21:01,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-21 21:21:01,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 171 transitions. [2020-12-21 21:21:01,986 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 171 transitions. Word has length 113 [2020-12-21 21:21:01,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:01,986 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 171 transitions. [2020-12-21 21:21:01,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 21:21:01,987 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 171 transitions. [2020-12-21 21:21:01,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-21 21:21:01,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:01,988 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:02,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 21:21:02,202 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:02,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:02,203 INFO L82 PathProgramCache]: Analyzing trace with hash -713195989, now seen corresponding path program 13 times [2020-12-21 21:21:02,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:02,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031592741] [2020-12-21 21:21:02,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-12-21 21:21:02,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031592741] [2020-12-21 21:21:02,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610422355] [2020-12-21 21:21:02,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:02,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 21:21:02,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-12-21 21:21:02,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:02,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-21 21:21:02,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945178037] [2020-12-21 21:21:02,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 21:21:02,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:02,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 21:21:02,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:21:02,767 INFO L87 Difference]: Start difference. First operand 151 states and 171 transitions. Second operand 23 states. [2020-12-21 21:21:03,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:03,087 INFO L93 Difference]: Finished difference Result 424 states and 484 transitions. [2020-12-21 21:21:03,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 21:21:03,087 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 124 [2020-12-21 21:21:03,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:03,089 INFO L225 Difference]: With dead ends: 424 [2020-12-21 21:21:03,089 INFO L226 Difference]: Without dead ends: 314 [2020-12-21 21:21:03,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:21:03,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-12-21 21:21:03,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 153. [2020-12-21 21:21:03,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-21 21:21:03,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 173 transitions. [2020-12-21 21:21:03,107 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 173 transitions. Word has length 124 [2020-12-21 21:21:03,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:03,107 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 173 transitions. [2020-12-21 21:21:03,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 21:21:03,107 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 173 transitions. [2020-12-21 21:21:03,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-21 21:21:03,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:03,109 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:03,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 21:21:03,323 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:03,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:03,323 INFO L82 PathProgramCache]: Analyzing trace with hash -829324243, now seen corresponding path program 14 times [2020-12-21 21:21:03,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:03,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560605893] [2020-12-21 21:21:03,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-12-21 21:21:03,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560605893] [2020-12-21 21:21:03,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906518909] [2020-12-21 21:21:03,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:03,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:21:03,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:03,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 21:21:03,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-12-21 21:21:03,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:03,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-21 21:21:03,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869883079] [2020-12-21 21:21:03,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 21:21:03,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:03,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 21:21:03,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:21:03,914 INFO L87 Difference]: Start difference. First operand 153 states and 173 transitions. Second operand 24 states. [2020-12-21 21:21:04,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:04,269 INFO L93 Difference]: Finished difference Result 434 states and 495 transitions. [2020-12-21 21:21:04,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 21:21:04,270 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 126 [2020-12-21 21:21:04,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:04,272 INFO L225 Difference]: With dead ends: 434 [2020-12-21 21:21:04,272 INFO L226 Difference]: Without dead ends: 324 [2020-12-21 21:21:04,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:21:04,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-12-21 21:21:04,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 155. [2020-12-21 21:21:04,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-21 21:21:04,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 175 transitions. [2020-12-21 21:21:04,290 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 175 transitions. Word has length 126 [2020-12-21 21:21:04,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:04,291 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 175 transitions. [2020-12-21 21:21:04,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 21:21:04,291 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 175 transitions. [2020-12-21 21:21:04,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-21 21:21:04,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:04,292 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:04,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-21 21:21:04,505 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:04,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:04,506 INFO L82 PathProgramCache]: Analyzing trace with hash -759426641, now seen corresponding path program 15 times [2020-12-21 21:21:04,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:04,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488180645] [2020-12-21 21:21:04,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-12-21 21:21:04,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488180645] [2020-12-21 21:21:04,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18771436] [2020-12-21 21:21:04,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:06,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-21 21:21:06,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:06,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:21:06,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:06,964 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 638 trivial. 0 not checked. [2020-12-21 21:21:06,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:06,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 11] total 33 [2020-12-21 21:21:06,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953072635] [2020-12-21 21:21:06,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-21 21:21:06,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:06,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-21 21:21:06,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=726, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:21:06,967 INFO L87 Difference]: Start difference. First operand 155 states and 175 transitions. Second operand 33 states. [2020-12-21 21:21:07,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:07,559 INFO L93 Difference]: Finished difference Result 466 states and 534 transitions. [2020-12-21 21:21:07,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-21 21:21:07,560 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 128 [2020-12-21 21:21:07,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:07,562 INFO L225 Difference]: With dead ends: 466 [2020-12-21 21:21:07,562 INFO L226 Difference]: Without dead ends: 356 [2020-12-21 21:21:07,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=627, Invalid=1095, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 21:21:07,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-12-21 21:21:07,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 169. [2020-12-21 21:21:07,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-21 21:21:07,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 191 transitions. [2020-12-21 21:21:07,587 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 191 transitions. Word has length 128 [2020-12-21 21:21:07,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:07,587 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 191 transitions. [2020-12-21 21:21:07,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-21 21:21:07,587 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 191 transitions. [2020-12-21 21:21:07,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-21 21:21:07,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:07,589 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 9, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:07,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 21:21:07,804 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:07,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:07,804 INFO L82 PathProgramCache]: Analyzing trace with hash -441718595, now seen corresponding path program 16 times [2020-12-21 21:21:07,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:07,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056332396] [2020-12-21 21:21:07,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2020-12-21 21:21:08,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056332396] [2020-12-21 21:21:08,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90247016] [2020-12-21 21:21:08,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:08,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:21:08,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:08,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 21:21:08,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2020-12-21 21:21:08,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:08,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-21 21:21:08,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534451991] [2020-12-21 21:21:08,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:21:08,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:08,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:21:08,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:21:08,657 INFO L87 Difference]: Start difference. First operand 169 states and 191 transitions. Second operand 26 states. [2020-12-21 21:21:09,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:09,120 INFO L93 Difference]: Finished difference Result 478 states and 545 transitions. [2020-12-21 21:21:09,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 21:21:09,121 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2020-12-21 21:21:09,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:09,123 INFO L225 Difference]: With dead ends: 478 [2020-12-21 21:21:09,123 INFO L226 Difference]: Without dead ends: 356 [2020-12-21 21:21:09,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:21:09,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-12-21 21:21:09,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 171. [2020-12-21 21:21:09,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-21 21:21:09,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 193 transitions. [2020-12-21 21:21:09,146 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 193 transitions. Word has length 139 [2020-12-21 21:21:09,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:09,146 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 193 transitions. [2020-12-21 21:21:09,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:21:09,147 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 193 transitions. [2020-12-21 21:21:09,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-21 21:21:09,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:09,148 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 9, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:09,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:09,362 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:09,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:09,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1349443195, now seen corresponding path program 17 times [2020-12-21 21:21:09,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:09,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983850492] [2020-12-21 21:21:09,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:09,741 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2020-12-21 21:21:09,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983850492] [2020-12-21 21:21:09,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101764216] [2020-12-21 21:21:09,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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