/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-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 18:56:13,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 18:56:13,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 18:56:13,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 18:56:13,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 18:56:13,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 18:56:13,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 18:56:13,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 18:56:13,144 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 18:56:13,152 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 18:56:13,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 18:56:13,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 18:56:13,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 18:56:13,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 18:56:13,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 18:56:13,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 18:56:13,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 18:56:13,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 18:56:13,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 18:56:13,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 18:56:13,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 18:56:13,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 18:56:13,197 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 18:56:13,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 18:56:13,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 18:56:13,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 18:56:13,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 18:56:13,211 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 18:56:13,211 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 18:56:13,213 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 18:56:13,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 18:56:13,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 18:56:13,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 18:56:13,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 18:56:13,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 18:56:13,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 18:56:13,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 18:56:13,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 18:56:13,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 18:56:13,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 18:56:13,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 18:56:13,228 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 18:56:13,286 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 18:56:13,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 18:56:13,292 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 18:56:13,293 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 18:56:13,293 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 18:56:13,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 18:56:13,293 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 18:56:13,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 18:56:13,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 18:56:13,295 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 18:56:13,296 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 18:56:13,296 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 18:56:13,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 18:56:13,297 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 18:56:13,297 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 18:56:13,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 18:56:13,297 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 18:56:13,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 18:56:13,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 18:56:13,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 18:56:13,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 18:56:13,299 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 18:56:13,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 18:56:13,299 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 18:56:13,299 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 18:56:13,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 18:56:13,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 18:56:13,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 18:56:13,771 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 18:56:13,771 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 18:56:13,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i [2020-12-22 18:56:13,869 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cbe8218c/4e538ef7466a40c581d1e349b996041c/FLAG83771c940 [2020-12-22 18:56:14,730 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 18:56:14,730 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i [2020-12-22 18:56:14,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cbe8218c/4e538ef7466a40c581d1e349b996041c/FLAG83771c940 [2020-12-22 18:56:14,958 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cbe8218c/4e538ef7466a40c581d1e349b996041c [2020-12-22 18:56:14,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 18:56:14,964 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 18:56:14,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 18:56:14,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 18:56:14,970 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 18:56:14,971 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:56:14" (1/1) ... [2020-12-22 18:56:14,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2625151a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:14, skipping insertion in model container [2020-12-22 18:56:14,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:56:14" (1/1) ... [2020-12-22 18:56:14,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 18:56:15,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 18:56:15,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 18:56:15,396 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 18:56:15,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 18:56:15,538 INFO L208 MainTranslator]: Completed translation [2020-12-22 18:56:15,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:15 WrapperNode [2020-12-22 18:56:15,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 18:56:15,540 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 18:56:15,541 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 18:56:15,541 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 18:56:15,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:15" (1/1) ... [2020-12-22 18:56:15,566 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:15" (1/1) ... [2020-12-22 18:56:15,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 18:56:15,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 18:56:15,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 18:56:15,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 18:56:15,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:15" (1/1) ... [2020-12-22 18:56:15,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:15" (1/1) ... [2020-12-22 18:56:15,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:15" (1/1) ... [2020-12-22 18:56:15,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:15" (1/1) ... [2020-12-22 18:56:15,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:15" (1/1) ... [2020-12-22 18:56:15,624 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:15" (1/1) ... [2020-12-22 18:56:15,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:15" (1/1) ... [2020-12-22 18:56:15,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 18:56:15,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 18:56:15,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 18:56:15,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 18:56:15,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 18:56:15,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 18:56:15,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 18:56:15,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 18:56:15,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 18:56:15,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 18:56:15,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 18:56:16,533 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 18:56:16,533 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 18:56:16,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:56:16 BoogieIcfgContainer [2020-12-22 18:56:16,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 18:56:16,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 18:56:16,538 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 18:56:16,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 18:56:16,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:56:14" (1/3) ... [2020-12-22 18:56:16,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@87c7214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:56:16, skipping insertion in model container [2020-12-22 18:56:16,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:15" (2/3) ... [2020-12-22 18:56:16,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@87c7214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:56:16, skipping insertion in model container [2020-12-22 18:56:16,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:56:16" (3/3) ... [2020-12-22 18:56:16,545 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrcmp-alloca-2.i [2020-12-22 18:56:16,553 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 18:56:16,560 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2020-12-22 18:56:16,583 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2020-12-22 18:56:16,610 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 18:56:16,610 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 18:56:16,610 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 18:56:16,611 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 18:56:16,611 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 18:56:16,611 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 18:56:16,611 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 18:56:16,611 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 18:56:16,628 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2020-12-22 18:56:16,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 18:56:16,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:16,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:16,637 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:16,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:16,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2020-12-22 18:56:16,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:16,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031212944] [2020-12-22 18:56:16,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:16,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:16,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031212944] [2020-12-22 18:56:16,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:16,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 18:56:16,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492056615] [2020-12-22 18:56:16,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:56:16,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:16,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:56:16,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:16,918 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 4 states. [2020-12-22 18:56:16,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:16,999 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2020-12-22 18:56:17,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:56:17,002 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-22 18:56:17,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:17,013 INFO L225 Difference]: With dead ends: 98 [2020-12-22 18:56:17,013 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 18:56:17,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:17,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 18:56:17,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 54. [2020-12-22 18:56:17,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 18:56:17,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-12-22 18:56:17,074 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 7 [2020-12-22 18:56:17,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:17,075 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-12-22 18:56:17,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:56:17,076 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-12-22 18:56:17,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 18:56:17,076 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:17,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:17,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 18:56:17,078 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:17,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:17,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2020-12-22 18:56:17,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:17,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967528942] [2020-12-22 18:56:17,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:17,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967528942] [2020-12-22 18:56:17,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:17,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 18:56:17,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552059082] [2020-12-22 18:56:17,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 18:56:17,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:17,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 18:56:17,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 18:56:17,224 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 3 states. [2020-12-22 18:56:17,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:17,313 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-12-22 18:56:17,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 18:56:17,313 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-22 18:56:17,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:17,315 INFO L225 Difference]: With dead ends: 52 [2020-12-22 18:56:17,315 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 18:56:17,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 18:56:17,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 18:56:17,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-22 18:56:17,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 18:56:17,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-12-22 18:56:17,328 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 7 [2020-12-22 18:56:17,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:17,329 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-12-22 18:56:17,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 18:56:17,329 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-12-22 18:56:17,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 18:56:17,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:17,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:17,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 18:56:17,331 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:17,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:17,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2020-12-22 18:56:17,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:17,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152429355] [2020-12-22 18:56:17,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:17,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152429355] [2020-12-22 18:56:17,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:17,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 18:56:17,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831736448] [2020-12-22 18:56:17,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:56:17,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:17,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:56:17,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:17,477 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 4 states. [2020-12-22 18:56:17,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:17,689 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2020-12-22 18:56:17,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:56:17,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-22 18:56:17,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:17,693 INFO L225 Difference]: With dead ends: 95 [2020-12-22 18:56:17,694 INFO L226 Difference]: Without dead ends: 95 [2020-12-22 18:56:17,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 18:56:17,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-22 18:56:17,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 54. [2020-12-22 18:56:17,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 18:56:17,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-12-22 18:56:17,712 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 7 [2020-12-22 18:56:17,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:17,714 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-12-22 18:56:17,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:56:17,714 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-12-22 18:56:17,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 18:56:17,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:17,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:17,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 18:56:17,717 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:17,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:17,719 INFO L82 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2020-12-22 18:56:17,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:17,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101328087] [2020-12-22 18:56:17,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:17,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101328087] [2020-12-22 18:56:17,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:17,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 18:56:17,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147173043] [2020-12-22 18:56:17,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:56:17,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:17,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:56:17,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:17,794 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 4 states. [2020-12-22 18:56:17,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:17,863 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-12-22 18:56:17,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:56:17,864 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-22 18:56:17,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:17,865 INFO L225 Difference]: With dead ends: 53 [2020-12-22 18:56:17,865 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 18:56:17,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:17,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 18:56:17,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-22 18:56:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 18:56:17,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-12-22 18:56:17,875 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 9 [2020-12-22 18:56:17,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:17,875 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-12-22 18:56:17,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:56:17,876 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-12-22 18:56:17,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 18:56:17,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:17,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:17,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 18:56:17,877 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:17,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:17,878 INFO L82 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2020-12-22 18:56:17,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:17,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834810869] [2020-12-22 18:56:17,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:17,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834810869] [2020-12-22 18:56:17,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:17,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 18:56:17,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820348042] [2020-12-22 18:56:17,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:56:17,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:17,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:56:17,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:17,981 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 4 states. [2020-12-22 18:56:18,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:18,014 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2020-12-22 18:56:18,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:56:18,014 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-22 18:56:18,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:18,015 INFO L225 Difference]: With dead ends: 96 [2020-12-22 18:56:18,016 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 18:56:18,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:18,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 18:56:18,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 64. [2020-12-22 18:56:18,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 18:56:18,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2020-12-22 18:56:18,027 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 9 [2020-12-22 18:56:18,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:18,028 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2020-12-22 18:56:18,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:56:18,028 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2020-12-22 18:56:18,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 18:56:18,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:18,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:18,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 18:56:18,029 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:18,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:18,030 INFO L82 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2020-12-22 18:56:18,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:18,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122430136] [2020-12-22 18:56:18,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:18,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122430136] [2020-12-22 18:56:18,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:18,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 18:56:18,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100327906] [2020-12-22 18:56:18,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 18:56:18,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:18,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 18:56:18,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 18:56:18,059 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 3 states. [2020-12-22 18:56:18,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:18,092 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-12-22 18:56:18,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 18:56:18,093 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-22 18:56:18,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:18,094 INFO L225 Difference]: With dead ends: 62 [2020-12-22 18:56:18,094 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 18:56:18,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 18:56:18,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 18:56:18,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-22 18:56:18,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 18:56:18,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2020-12-22 18:56:18,100 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 9 [2020-12-22 18:56:18,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:18,100 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2020-12-22 18:56:18,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 18:56:18,100 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2020-12-22 18:56:18,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 18:56:18,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:18,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:18,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 18:56:18,102 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:18,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:18,102 INFO L82 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2020-12-22 18:56:18,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:18,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319747738] [2020-12-22 18:56:18,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:18,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:18,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319747738] [2020-12-22 18:56:18,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:18,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 18:56:18,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727595208] [2020-12-22 18:56:18,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 18:56:18,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:18,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 18:56:18,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 18:56:18,180 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand 5 states. [2020-12-22 18:56:18,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:18,299 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2020-12-22 18:56:18,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 18:56:18,300 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-22 18:56:18,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:18,301 INFO L225 Difference]: With dead ends: 96 [2020-12-22 18:56:18,301 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 18:56:18,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 18:56:18,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 18:56:18,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 64. [2020-12-22 18:56:18,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 18:56:18,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2020-12-22 18:56:18,308 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 9 [2020-12-22 18:56:18,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:18,308 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2020-12-22 18:56:18,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 18:56:18,308 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2020-12-22 18:56:18,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 18:56:18,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:18,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:18,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 18:56:18,309 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:18,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:18,310 INFO L82 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2020-12-22 18:56:18,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:18,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648251320] [2020-12-22 18:56:18,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:18,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648251320] [2020-12-22 18:56:18,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:18,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 18:56:18,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069061539] [2020-12-22 18:56:18,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:56:18,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:18,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:56:18,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:18,358 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 4 states. [2020-12-22 18:56:18,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:18,403 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-12-22 18:56:18,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:56:18,403 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-22 18:56:18,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:18,404 INFO L225 Difference]: With dead ends: 63 [2020-12-22 18:56:18,404 INFO L226 Difference]: Without dead ends: 63 [2020-12-22 18:56:18,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:18,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-22 18:56:18,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-22 18:56:18,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 18:56:18,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2020-12-22 18:56:18,410 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 10 [2020-12-22 18:56:18,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:18,410 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2020-12-22 18:56:18,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:56:18,410 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2020-12-22 18:56:18,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 18:56:18,411 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:18,411 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:18,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 18:56:18,412 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:18,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:18,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2020-12-22 18:56:18,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:18,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762881091] [2020-12-22 18:56:18,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:18,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762881091] [2020-12-22 18:56:18,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134051470] [2020-12-22 18:56:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:18,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 18:56:18,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:18,612 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_22|], 1=[|v_#valid_30|]} [2020-12-22 18:56:18,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 18:56:18,630 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 18:56:18,632 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:18,643 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:18,651 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 18:56:18,658 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:18,669 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:18,673 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:18,673 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 18:56:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:18,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:18,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 18:56:18,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793946701] [2020-12-22 18:56:18,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 18:56:18,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:18,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 18:56:18,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 18:56:18,722 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand 6 states. [2020-12-22 18:56:18,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:18,889 INFO L93 Difference]: Finished difference Result 105 states and 120 transitions. [2020-12-22 18:56:18,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 18:56:18,890 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-22 18:56:18,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:18,891 INFO L225 Difference]: With dead ends: 105 [2020-12-22 18:56:18,891 INFO L226 Difference]: Without dead ends: 105 [2020-12-22 18:56:18,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 18:56:18,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-22 18:56:18,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 58. [2020-12-22 18:56:18,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 18:56:18,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2020-12-22 18:56:18,897 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 11 [2020-12-22 18:56:18,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:18,897 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2020-12-22 18:56:18,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 18:56:18,898 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2020-12-22 18:56:18,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 18:56:18,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:18,899 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:19,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 18:56:19,115 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:19,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:19,116 INFO L82 PathProgramCache]: Analyzing trace with hash -464624129, now seen corresponding path program 1 times [2020-12-22 18:56:19,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:19,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281078913] [2020-12-22 18:56:19,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:19,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:19,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281078913] [2020-12-22 18:56:19,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:19,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 18:56:19,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566479595] [2020-12-22 18:56:19,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 18:56:19,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:19,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 18:56:19,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 18:56:19,224 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 6 states. [2020-12-22 18:56:19,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:19,367 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2020-12-22 18:56:19,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 18:56:19,368 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-22 18:56:19,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:19,369 INFO L225 Difference]: With dead ends: 81 [2020-12-22 18:56:19,369 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 18:56:19,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 18:56:19,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 18:56:19,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2020-12-22 18:56:19,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 18:56:19,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-12-22 18:56:19,376 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 12 [2020-12-22 18:56:19,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:19,377 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-12-22 18:56:19,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 18:56:19,377 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2020-12-22 18:56:19,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 18:56:19,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:19,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:19,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 18:56:19,378 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:19,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:19,379 INFO L82 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2020-12-22 18:56:19,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:19,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21807636] [2020-12-22 18:56:19,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:19,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21807636] [2020-12-22 18:56:19,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:19,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 18:56:19,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036952399] [2020-12-22 18:56:19,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:56:19,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:19,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:56:19,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:19,437 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 4 states. [2020-12-22 18:56:19,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:19,503 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2020-12-22 18:56:19,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:56:19,504 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-22 18:56:19,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:19,505 INFO L225 Difference]: With dead ends: 63 [2020-12-22 18:56:19,505 INFO L226 Difference]: Without dead ends: 63 [2020-12-22 18:56:19,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 18:56:19,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-22 18:56:19,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-22 18:56:19,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 18:56:19,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-12-22 18:56:19,515 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 12 [2020-12-22 18:56:19,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:19,515 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-12-22 18:56:19,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:56:19,516 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-12-22 18:56:19,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 18:56:19,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:19,520 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:19,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 18:56:19,520 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:19,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:19,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2020-12-22 18:56:19,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:19,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382681335] [2020-12-22 18:56:19,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:19,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382681335] [2020-12-22 18:56:19,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555458820] [2020-12-22 18:56:19,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:19,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 18:56:19,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:19,728 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:19,732 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 18:56:19,735 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:19,759 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 18:56:19,767 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:19,768 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 18:56:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:19,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:19,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 18:56:19,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980286936] [2020-12-22 18:56:19,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 18:56:19,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:19,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 18:56:19,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 18:56:19,834 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 7 states. [2020-12-22 18:56:19,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:19,989 INFO L93 Difference]: Finished difference Result 98 states and 117 transitions. [2020-12-22 18:56:19,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 18:56:19,990 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-22 18:56:19,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:19,991 INFO L225 Difference]: With dead ends: 98 [2020-12-22 18:56:19,991 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 18:56:19,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 18:56:19,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 18:56:19,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 60. [2020-12-22 18:56:19,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 18:56:19,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2020-12-22 18:56:19,995 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 13 [2020-12-22 18:56:19,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:19,996 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2020-12-22 18:56:19,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 18:56:19,996 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2020-12-22 18:56:19,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 18:56:19,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:19,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:20,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 18:56:20,212 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:20,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:20,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1432374396, now seen corresponding path program 1 times [2020-12-22 18:56:20,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:20,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908449765] [2020-12-22 18:56:20,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:20,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:20,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908449765] [2020-12-22 18:56:20,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:20,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 18:56:20,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49047224] [2020-12-22 18:56:20,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:56:20,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:20,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:56:20,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:20,275 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand 4 states. [2020-12-22 18:56:20,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:20,315 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2020-12-22 18:56:20,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:56:20,316 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-22 18:56:20,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:20,317 INFO L225 Difference]: With dead ends: 58 [2020-12-22 18:56:20,317 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 18:56:20,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 18:56:20,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 18:56:20,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-22 18:56:20,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 18:56:20,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2020-12-22 18:56:20,320 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 16 [2020-12-22 18:56:20,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:20,320 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2020-12-22 18:56:20,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:56:20,321 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2020-12-22 18:56:20,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 18:56:20,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:20,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:20,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 18:56:20,322 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:20,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:20,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1432374395, now seen corresponding path program 1 times [2020-12-22 18:56:20,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:20,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159988772] [2020-12-22 18:56:20,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:20,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159988772] [2020-12-22 18:56:20,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:20,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 18:56:20,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634819207] [2020-12-22 18:56:20,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 18:56:20,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:20,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 18:56:20,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 18:56:20,389 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand 6 states. [2020-12-22 18:56:20,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:20,452 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-12-22 18:56:20,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 18:56:20,453 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-22 18:56:20,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:20,453 INFO L225 Difference]: With dead ends: 66 [2020-12-22 18:56:20,453 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 18:56:20,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 18:56:20,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 18:56:20,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-12-22 18:56:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 18:56:20,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2020-12-22 18:56:20,456 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 16 [2020-12-22 18:56:20,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:20,457 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2020-12-22 18:56:20,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 18:56:20,457 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2020-12-22 18:56:20,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 18:56:20,458 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:20,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:20,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 18:56:20,458 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:20,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:20,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1432365322, now seen corresponding path program 1 times [2020-12-22 18:56:20,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:20,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857066590] [2020-12-22 18:56:20,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:20,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:20,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857066590] [2020-12-22 18:56:20,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:20,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 18:56:20,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834408068] [2020-12-22 18:56:20,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 18:56:20,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:20,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 18:56:20,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 18:56:20,483 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 3 states. [2020-12-22 18:56:20,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:20,493 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2020-12-22 18:56:20,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 18:56:20,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-12-22 18:56:20,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:20,494 INFO L225 Difference]: With dead ends: 62 [2020-12-22 18:56:20,494 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 18:56:20,495 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 [2020-12-22 18:56:20,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 18:56:20,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-22 18:56:20,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 18:56:20,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-12-22 18:56:20,498 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 16 [2020-12-22 18:56:20,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:20,498 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-12-22 18:56:20,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 18:56:20,498 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-12-22 18:56:20,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 18:56:20,499 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:20,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:20,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 18:56:20,500 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:20,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:20,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1365500555, now seen corresponding path program 1 times [2020-12-22 18:56:20,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:20,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113609866] [2020-12-22 18:56:20,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:20,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113609866] [2020-12-22 18:56:20,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:20,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 18:56:20,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75182720] [2020-12-22 18:56:20,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 18:56:20,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:20,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 18:56:20,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 18:56:20,654 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 8 states. [2020-12-22 18:56:20,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:20,825 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2020-12-22 18:56:20,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 18:56:20,825 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-12-22 18:56:20,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:20,826 INFO L225 Difference]: With dead ends: 85 [2020-12-22 18:56:20,826 INFO L226 Difference]: Without dead ends: 85 [2020-12-22 18:56:20,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-12-22 18:56:20,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-22 18:56:20,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2020-12-22 18:56:20,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 18:56:20,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2020-12-22 18:56:20,830 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 19 [2020-12-22 18:56:20,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:20,830 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2020-12-22 18:56:20,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 18:56:20,830 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2020-12-22 18:56:20,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 18:56:20,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:20,831 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:20,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 18:56:20,832 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:20,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:20,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1341118839, now seen corresponding path program 1 times [2020-12-22 18:56:20,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:20,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840671380] [2020-12-22 18:56:20,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:21,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840671380] [2020-12-22 18:56:21,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:21,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 18:56:21,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637490592] [2020-12-22 18:56:21,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 18:56:21,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:21,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 18:56:21,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-22 18:56:21,069 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand 9 states. [2020-12-22 18:56:21,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:21,278 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2020-12-22 18:56:21,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 18:56:21,278 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-12-22 18:56:21,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:21,279 INFO L225 Difference]: With dead ends: 106 [2020-12-22 18:56:21,279 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 18:56:21,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-22 18:56:21,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 18:56:21,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 77. [2020-12-22 18:56:21,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-22 18:56:21,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2020-12-22 18:56:21,283 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 19 [2020-12-22 18:56:21,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:21,284 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2020-12-22 18:56:21,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 18:56:21,284 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2020-12-22 18:56:21,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 18:56:21,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:21,285 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:21,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 18:56:21,285 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:21,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:21,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1756023060, now seen corresponding path program 1 times [2020-12-22 18:56:21,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:21,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283652128] [2020-12-22 18:56:21,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:21,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283652128] [2020-12-22 18:56:21,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:21,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-12-22 18:56:21,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319561933] [2020-12-22 18:56:21,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 18:56:21,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:21,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 18:56:21,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-12-22 18:56:21,505 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand 13 states. [2020-12-22 18:56:21,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:21,924 INFO L93 Difference]: Finished difference Result 134 states and 150 transitions. [2020-12-22 18:56:21,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 18:56:21,925 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-12-22 18:56:21,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:21,926 INFO L225 Difference]: With dead ends: 134 [2020-12-22 18:56:21,926 INFO L226 Difference]: Without dead ends: 134 [2020-12-22 18:56:21,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2020-12-22 18:56:21,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-22 18:56:21,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 95. [2020-12-22 18:56:21,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-22 18:56:21,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 109 transitions. [2020-12-22 18:56:21,931 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 109 transitions. Word has length 23 [2020-12-22 18:56:21,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:21,932 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 109 transitions. [2020-12-22 18:56:21,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 18:56:21,932 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 109 transitions. [2020-12-22 18:56:21,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 18:56:21,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:21,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:21,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 18:56:21,933 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:21,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:21,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1756082642, now seen corresponding path program 1 times [2020-12-22 18:56:21,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:21,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337634357] [2020-12-22 18:56:21,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:22,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337634357] [2020-12-22 18:56:22,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:22,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 18:56:22,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616928449] [2020-12-22 18:56:22,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 18:56:22,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:22,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 18:56:22,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:22,053 INFO L87 Difference]: Start difference. First operand 95 states and 109 transitions. Second operand 4 states. [2020-12-22 18:56:22,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:22,084 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2020-12-22 18:56:22,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 18:56:22,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-12-22 18:56:22,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:22,085 INFO L225 Difference]: With dead ends: 94 [2020-12-22 18:56:22,085 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 18:56:22,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 18:56:22,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 18:56:22,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2020-12-22 18:56:22,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 18:56:22,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-12-22 18:56:22,089 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 23 [2020-12-22 18:56:22,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:22,089 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-12-22 18:56:22,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 18:56:22,089 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-12-22 18:56:22,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 18:56:22,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:22,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:22,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 18:56:22,094 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:22,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:22,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1222026810, now seen corresponding path program 1 times [2020-12-22 18:56:22,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:22,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933116365] [2020-12-22 18:56:22,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:22,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933116365] [2020-12-22 18:56:22,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018681106] [2020-12-22 18:56:22,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:22,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 18:56:22,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:22,309 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_24|], 1=[|v_#valid_31|]} [2020-12-22 18:56:22,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 18:56:22,315 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 18:56:22,316 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:22,325 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:22,331 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 18:56:22,333 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:22,341 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:22,344 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:22,344 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 18:56:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:22,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:22,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-12-22 18:56:22,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114515939] [2020-12-22 18:56:22,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 18:56:22,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:22,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 18:56:22,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-12-22 18:56:22,455 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 12 states. [2020-12-22 18:56:22,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:22,716 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-12-22 18:56:22,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 18:56:22,716 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-12-22 18:56:22,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:22,717 INFO L225 Difference]: With dead ends: 68 [2020-12-22 18:56:22,717 INFO L226 Difference]: Without dead ends: 68 [2020-12-22 18:56:22,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-12-22 18:56:22,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-22 18:56:22,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2020-12-22 18:56:22,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 18:56:22,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-12-22 18:56:22,720 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 23 [2020-12-22 18:56:22,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:22,721 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-12-22 18:56:22,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 18:56:22,721 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-12-22 18:56:22,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 18:56:22,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:22,722 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:22,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:22,926 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:22,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:22,927 INFO L82 PathProgramCache]: Analyzing trace with hash 340221504, now seen corresponding path program 1 times [2020-12-22 18:56:22,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:22,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483202319] [2020-12-22 18:56:22,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:23,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483202319] [2020-12-22 18:56:23,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603423575] [2020-12-22 18:56:23,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:23,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 18:56:23,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:23,339 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 18:56:23,340 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:23,346 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:23,349 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:56:23,349 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 18:56:23,752 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:23,753 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 52 [2020-12-22 18:56:23,756 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:23,785 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:23,790 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:56:23,797 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 18:56:23,801 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 18:56:23,804 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:23,804 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:49, output treesize:35 [2020-12-22 18:56:23,867 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:56:23,870 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:56:23,871 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:56:23,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:56:23,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:23,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-12-22 18:56:23,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241868918] [2020-12-22 18:56:23,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 18:56:23,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:23,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 18:56:23,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-12-22 18:56:23,957 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 21 states. [2020-12-22 18:56:24,626 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-12-22 18:56:24,779 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-12-22 18:56:24,987 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-12-22 18:56:25,230 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-12-22 18:56:25,528 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-12-22 18:56:26,099 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-12-22 18:56:26,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:26,627 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2020-12-22 18:56:26,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 18:56:26,628 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 27 [2020-12-22 18:56:26,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:26,629 INFO L225 Difference]: With dead ends: 98 [2020-12-22 18:56:26,629 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 18:56:26,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=396, Invalid=1766, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 18:56:26,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 18:56:26,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-12-22 18:56:26,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 18:56:26,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-12-22 18:56:26,634 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 27 [2020-12-22 18:56:26,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:26,634 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-12-22 18:56:26,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 18:56:26,634 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-12-22 18:56:26,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 18:56:26,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:26,635 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:26,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:26,852 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:26,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:26,853 INFO L82 PathProgramCache]: Analyzing trace with hash -459022281, now seen corresponding path program 2 times [2020-12-22 18:56:26,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:26,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52586625] [2020-12-22 18:56:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 18:56:26,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52586625] [2020-12-22 18:56:26,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337453522] [2020-12-22 18:56:26,937 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:27,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 18:56:27,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:27,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 18:56:27,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:27,052 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-22 18:56:27,053 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:27,054 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:27,055 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:27,055 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-12-22 18:56:27,167 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:27,168 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2020-12-22 18:56:27,170 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:27,177 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:27,179 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:27,179 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:30, output treesize:8 [2020-12-22 18:56:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 18:56:27,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 18:56:27,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2020-12-22 18:56:27,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283998768] [2020-12-22 18:56:27,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 18:56:27,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:27,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 18:56:27,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-12-22 18:56:27,219 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 11 states. [2020-12-22 18:56:27,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:27,608 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2020-12-22 18:56:27,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 18:56:27,612 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-12-22 18:56:27,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:27,612 INFO L225 Difference]: With dead ends: 74 [2020-12-22 18:56:27,613 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 18:56:27,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2020-12-22 18:56:27,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 18:56:27,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-22 18:56:27,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 18:56:27,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-12-22 18:56:27,615 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 34 [2020-12-22 18:56:27,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:27,616 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-12-22 18:56:27,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 18:56:27,616 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-12-22 18:56:27,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 18:56:27,617 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:27,617 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:27,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 18:56:27,826 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:27,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:27,826 INFO L82 PathProgramCache]: Analyzing trace with hash 242577593, now seen corresponding path program 1 times [2020-12-22 18:56:27,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:27,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608227184] [2020-12-22 18:56:27,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:27,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608227184] [2020-12-22 18:56:27,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120105493] [2020-12-22 18:56:27,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:28,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 18:56:28,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:28,039 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:28,040 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 18:56:28,041 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:28,056 INFO L625 ElimStorePlain]: treesize reduction 10, result has 60.0 percent of original size [2020-12-22 18:56:28,058 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:28,058 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:9, output treesize:5 [2020-12-22 18:56:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 18:56:28,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 18:56:28,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2020-12-22 18:56:28,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794137684] [2020-12-22 18:56:28,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 18:56:28,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:28,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 18:56:28,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-12-22 18:56:28,193 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 8 states. [2020-12-22 18:56:28,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:28,339 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2020-12-22 18:56:28,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 18:56:28,339 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-12-22 18:56:28,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:28,340 INFO L225 Difference]: With dead ends: 71 [2020-12-22 18:56:28,340 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 18:56:28,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-12-22 18:56:28,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 18:56:28,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-12-22 18:56:28,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 18:56:28,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-12-22 18:56:28,342 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 34 [2020-12-22 18:56:28,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:28,343 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-12-22 18:56:28,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 18:56:28,343 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-12-22 18:56:28,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 18:56:28,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:28,343 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:28,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:28,559 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:28,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:28,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1342695082, now seen corresponding path program 1 times [2020-12-22 18:56:28,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:28,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576335277] [2020-12-22 18:56:28,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:56:28,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576335277] [2020-12-22 18:56:28,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168472767] [2020-12-22 18:56:28,685 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 [2020-12-22 18:56:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:28,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 18:56:28,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 18:56:28,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:28,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-12-22 18:56:28,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842107836] [2020-12-22 18:56:28,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 18:56:28,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:28,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 18:56:28,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-12-22 18:56:28,913 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 15 states. [2020-12-22 18:56:29,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:29,175 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-12-22 18:56:29,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 18:56:29,176 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-12-22 18:56:29,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:29,177 INFO L225 Difference]: With dead ends: 66 [2020-12-22 18:56:29,177 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 18:56:29,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-12-22 18:56:29,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 18:56:29,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-12-22 18:56:29,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 18:56:29,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-12-22 18:56:29,180 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 38 [2020-12-22 18:56:29,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:29,181 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-12-22 18:56:29,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 18:56:29,181 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-12-22 18:56:29,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 18:56:29,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:29,181 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-12-22 18:56:29,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:29,399 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:29,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:29,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1493295964, now seen corresponding path program 1 times [2020-12-22 18:56:29,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:29,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757194726] [2020-12-22 18:56:29,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:30,059 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:30,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757194726] [2020-12-22 18:56:30,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723096613] [2020-12-22 18:56:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:30,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:30,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 18:56:30,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:30,327 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 18:56:30,328 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:30,335 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:30,337 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:56:30,338 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2020-12-22 18:56:30,815 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:56:31,685 WARN L197 SmtUtils]: Spent 789.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-22 18:56:32,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 18:56:32,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 18:56:32,307 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 18:56:32,363 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:32,363 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 118 [2020-12-22 18:56:32,367 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-12-22 18:56:32,368 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-22 18:56:32,369 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-22 18:56:32,370 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 18:56:32,376 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:32,457 INFO L625 ElimStorePlain]: treesize reduction 96, result has 32.9 percent of original size [2020-12-22 18:56:32,461 INFO L547 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:32,461 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:71, output treesize:8 [2020-12-22 18:56:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 18:56:32,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:32,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 37 [2020-12-22 18:56:32,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24479029] [2020-12-22 18:56:32,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 18:56:32,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:32,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 18:56:32,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 18:56:32,525 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 37 states. [2020-12-22 18:56:34,143 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-12-22 18:56:34,344 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-12-22 18:56:34,621 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-12-22 18:56:34,944 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-12-22 18:56:43,184 WARN L197 SmtUtils]: Spent 8.08 s on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-12-22 18:56:43,349 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2020-12-22 18:56:43,543 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-12-22 18:56:43,855 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-12-22 18:56:44,283 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-12-22 18:56:44,673 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-12-22 18:56:44,888 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-12-22 18:56:45,126 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2020-12-22 18:56:45,463 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-12-22 18:56:45,766 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2020-12-22 18:56:45,971 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-12-22 18:56:46,289 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-12-22 18:56:46,484 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-12-22 18:56:46,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:46,783 INFO L93 Difference]: Finished difference Result 165 states and 177 transitions. [2020-12-22 18:56:46,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 18:56:46,784 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 42 [2020-12-22 18:56:46,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:46,785 INFO L225 Difference]: With dead ends: 165 [2020-12-22 18:56:46,785 INFO L226 Difference]: Without dead ends: 131 [2020-12-22 18:56:46,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=965, Invalid=5515, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 18:56:46,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-22 18:56:46,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 66. [2020-12-22 18:56:46,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 18:56:46,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2020-12-22 18:56:46,791 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 42 [2020-12-22 18:56:46,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:46,791 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2020-12-22 18:56:46,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 18:56:46,791 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2020-12-22 18:56:46,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 18:56:46,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:46,792 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:47,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 18:56:47,002 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:47,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:47,003 INFO L82 PathProgramCache]: Analyzing trace with hash 794074873, now seen corresponding path program 2 times [2020-12-22 18:56:47,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:47,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493194550] [2020-12-22 18:56:47,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 18:56:47,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493194550] [2020-12-22 18:56:47,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517154799] [2020-12-22 18:56:47,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:47,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 18:56:47,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:47,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 18:56:47,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:47,281 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:47,281 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 18:56:47,282 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:47,301 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 18:56:47,303 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:47,304 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 18:56:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 18:56:47,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:47,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 18:56:47,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509604584] [2020-12-22 18:56:47,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 18:56:47,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:47,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 18:56:47,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-12-22 18:56:47,485 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand 17 states. [2020-12-22 18:56:47,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:47,718 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-12-22 18:56:47,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 18:56:47,719 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-12-22 18:56:47,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:47,720 INFO L225 Difference]: With dead ends: 68 [2020-12-22 18:56:47,720 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 18:56:47,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-12-22 18:56:47,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 18:56:47,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-22 18:56:47,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 18:56:47,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-12-22 18:56:47,723 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 46 [2020-12-22 18:56:47,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:47,723 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-12-22 18:56:47,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 18:56:47,724 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-12-22 18:56:47,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 18:56:47,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:47,724 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:47,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 18:56:47,932 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:47,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:47,933 INFO L82 PathProgramCache]: Analyzing trace with hash -395309695, now seen corresponding path program 2 times [2020-12-22 18:56:47,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:47,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756676878] [2020-12-22 18:56:47,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:48,188 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 18:56:48,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756676878] [2020-12-22 18:56:48,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363292630] [2020-12-22 18:56:48,189 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:48,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 18:56:48,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:48,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 18:56:48,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:48,302 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:48,302 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 18:56:48,303 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:48,320 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 18:56:48,321 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:48,321 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 18:56:48,494 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-22 18:56:48,494 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:48,499 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:48,499 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:48,500 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-22 18:56:48,965 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2020-12-22 18:56:48,967 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:56:48,983 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:48,988 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 18:56:49,004 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:49,005 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 43 [2020-12-22 18:56:49,007 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:49,041 INFO L625 ElimStorePlain]: treesize reduction 15, result has 66.7 percent of original size [2020-12-22 18:56:49,044 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:49,045 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:49, output treesize:8 [2020-12-22 18:56:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 18:56:49,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:49,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 28 [2020-12-22 18:56:49,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423377833] [2020-12-22 18:56:49,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 18:56:49,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:49,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 18:56:49,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2020-12-22 18:56:49,099 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 28 states. [2020-12-22 18:56:50,976 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 18:56:51,157 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-12-22 18:56:52,013 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 18:56:52,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:52,295 INFO L93 Difference]: Finished difference Result 159 states and 163 transitions. [2020-12-22 18:56:52,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 18:56:52,296 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 49 [2020-12-22 18:56:52,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:52,296 INFO L225 Difference]: With dead ends: 159 [2020-12-22 18:56:52,296 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 18:56:52,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=565, Invalid=3217, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 18:56:52,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 18:56:52,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2020-12-22 18:56:52,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 18:56:52,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-12-22 18:56:52,301 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 49 [2020-12-22 18:56:52,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:52,301 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-12-22 18:56:52,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 18:56:52,302 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-12-22 18:56:52,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 18:56:52,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:52,302 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:52,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 18:56:52,516 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:52,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:52,517 INFO L82 PathProgramCache]: Analyzing trace with hash -2098265017, now seen corresponding path program 3 times [2020-12-22 18:56:52,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:52,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267763796] [2020-12-22 18:56:52,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 18:56:52,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267763796] [2020-12-22 18:56:52,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864828066] [2020-12-22 18:56:52,722 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:52,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 18:56:52,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:52,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 18:56:52,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 18:56:53,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:53,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2020-12-22 18:56:53,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920383042] [2020-12-22 18:56:53,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 18:56:53,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:53,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 18:56:53,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2020-12-22 18:56:53,085 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 21 states. [2020-12-22 18:56:53,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:53,468 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2020-12-22 18:56:53,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 18:56:53,469 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2020-12-22 18:56:53,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:53,470 INFO L225 Difference]: With dead ends: 85 [2020-12-22 18:56:53,470 INFO L226 Difference]: Without dead ends: 85 [2020-12-22 18:56:53,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2020-12-22 18:56:53,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-22 18:56:53,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2020-12-22 18:56:53,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 18:56:53,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2020-12-22 18:56:53,474 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 57 [2020-12-22 18:56:53,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:53,474 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2020-12-22 18:56:53,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 18:56:53,474 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2020-12-22 18:56:53,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 18:56:53,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:53,475 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:53,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 18:56:53,676 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:53,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:53,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1346900531, now seen corresponding path program 3 times [2020-12-22 18:56:53,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:53,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634550567] [2020-12-22 18:56:53,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 18:56:53,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634550567] [2020-12-22 18:56:53,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977032850] [2020-12-22 18:56:53,863 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:53,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 18:56:53,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:53,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 18:56:53,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:53,985 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:53,985 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 18:56:53,990 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:54,009 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 18:56:54,011 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:54,011 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 18:56:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 18:56:54,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:54,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-12-22 18:56:54,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053038667] [2020-12-22 18:56:54,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 18:56:54,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:54,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 18:56:54,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2020-12-22 18:56:54,303 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand 22 states. [2020-12-22 18:56:54,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:54,793 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2020-12-22 18:56:54,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 18:56:54,794 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2020-12-22 18:56:54,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:54,794 INFO L225 Difference]: With dead ends: 83 [2020-12-22 18:56:54,794 INFO L226 Difference]: Without dead ends: 79 [2020-12-22 18:56:54,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-12-22 18:56:54,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-22 18:56:54,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-12-22 18:56:54,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 18:56:54,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-12-22 18:56:54,797 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 61 [2020-12-22 18:56:54,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:54,798 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-12-22 18:56:54,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 18:56:54,798 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-12-22 18:56:54,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 18:56:54,798 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:54,799 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:56:55,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 18:56:55,012 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:56:55,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:55,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1929224659, now seen corresponding path program 4 times [2020-12-22 18:56:55,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:55,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001197263] [2020-12-22 18:56:55,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 18:56:55,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001197263] [2020-12-22 18:56:55,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592512484] [2020-12-22 18:56:55,327 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:56:55,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 18:56:55,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:56:55,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 18:56:55,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:56:55,439 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:55,440 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 18:56:55,441 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:55,462 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 18:56:55,465 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:55,465 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 18:56:55,696 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-22 18:56:55,697 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:55,701 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:55,702 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:55,702 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-22 18:56:56,243 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2020-12-22 18:56:56,245 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:56:56,263 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:56,268 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 18:56:56,286 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:56:56,287 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 43 [2020-12-22 18:56:56,289 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 18:56:56,324 INFO L625 ElimStorePlain]: treesize reduction 17, result has 62.2 percent of original size [2020-12-22 18:56:56,328 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:56:56,328 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:49, output treesize:8 [2020-12-22 18:56:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 40 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 18:56:56,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:56:56,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20] total 32 [2020-12-22 18:56:56,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690947933] [2020-12-22 18:56:56,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 18:56:56,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:56,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 18:56:56,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2020-12-22 18:56:56,390 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 32 states. [2020-12-22 18:56:57,336 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-12-22 18:56:58,749 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 18:56:58,949 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-12-22 18:57:00,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:00,128 INFO L93 Difference]: Finished difference Result 199 states and 203 transitions. [2020-12-22 18:57:00,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 18:57:00,129 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 64 [2020-12-22 18:57:00,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:00,130 INFO L225 Difference]: With dead ends: 199 [2020-12-22 18:57:00,130 INFO L226 Difference]: Without dead ends: 93 [2020-12-22 18:57:00,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=674, Invalid=4296, Unknown=0, NotChecked=0, Total=4970 [2020-12-22 18:57:00,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-22 18:57:00,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2020-12-22 18:57:00,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 18:57:00,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-12-22 18:57:00,135 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 64 [2020-12-22 18:57:00,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:00,135 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-12-22 18:57:00,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 18:57:00,136 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-12-22 18:57:00,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 18:57:00,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:00,136 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:00,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:00,352 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:57:00,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:00,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1604493991, now seen corresponding path program 5 times [2020-12-22 18:57:00,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:00,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96287008] [2020-12-22 18:57:00,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:00,555 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 6 proven. 68 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 18:57:00,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96287008] [2020-12-22 18:57:00,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342505548] [2020-12-22 18:57:00,556 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:00,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 18:57:00,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:00,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 18:57:00,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:00,680 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_30|], 1=[|v_#valid_32|]} [2020-12-22 18:57:00,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 18:57:00,684 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 18:57:00,685 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:00,695 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:00,700 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 18:57:00,701 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:00,710 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:00,712 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:00,712 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 18:57:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 18:57:01,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:01,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2020-12-22 18:57:01,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478714910] [2020-12-22 18:57:01,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 18:57:01,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:01,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 18:57:01,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-12-22 18:57:01,044 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 21 states. [2020-12-22 18:57:01,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:01,704 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2020-12-22 18:57:01,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 18:57:01,705 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 72 [2020-12-22 18:57:01,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:01,706 INFO L225 Difference]: With dead ends: 100 [2020-12-22 18:57:01,706 INFO L226 Difference]: Without dead ends: 100 [2020-12-22 18:57:01,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2020-12-22 18:57:01,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-22 18:57:01,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-12-22 18:57:01,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-22 18:57:01,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2020-12-22 18:57:01,710 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 72 [2020-12-22 18:57:01,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:01,711 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2020-12-22 18:57:01,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 18:57:01,711 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2020-12-22 18:57:01,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 18:57:01,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:01,712 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:01,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:01,925 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:57:01,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:01,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1296737235, now seen corresponding path program 4 times [2020-12-22 18:57:01,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:01,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709079196] [2020-12-22 18:57:01,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 18:57:02,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709079196] [2020-12-22 18:57:02,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783469154] [2020-12-22 18:57:02,154 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:02,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 18:57:02,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:02,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 18:57:02,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:02,267 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:02,268 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 18:57:02,269 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:02,291 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 18:57:02,294 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:02,294 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 18:57:02,420 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-22 18:57:02,424 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:02,431 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:02,434 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:02,435 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-22 18:57:02,938 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:02,939 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 54 [2020-12-22 18:57:02,941 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:02,970 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:02,971 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 18:57:02,976 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:02,976 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:28 [2020-12-22 18:57:03,029 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:57:03,030 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:57:03,031 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:57:03,032 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:57:03,033 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:57:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 18 proven. 72 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 18:57:03,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:03,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 28 [2020-12-22 18:57:03,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504268516] [2020-12-22 18:57:03,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 18:57:03,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:03,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 18:57:03,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2020-12-22 18:57:03,165 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand 29 states. [2020-12-22 18:57:04,629 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2020-12-22 18:57:05,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:05,028 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2020-12-22 18:57:05,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 18:57:05,029 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 76 [2020-12-22 18:57:05,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:05,030 INFO L225 Difference]: With dead ends: 98 [2020-12-22 18:57:05,030 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 18:57:05,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 18:57:05,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 18:57:05,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-12-22 18:57:05,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-22 18:57:05,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2020-12-22 18:57:05,034 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 76 [2020-12-22 18:57:05,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:05,035 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2020-12-22 18:57:05,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 18:57:05,035 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2020-12-22 18:57:05,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 18:57:05,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:05,036 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:05,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 18:57:05,250 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:57:05,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:05,251 INFO L82 PathProgramCache]: Analyzing trace with hash 2131874765, now seen corresponding path program 6 times [2020-12-22 18:57:05,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:05,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166756687] [2020-12-22 18:57:05,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:05,648 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 21 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 18:57:05,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166756687] [2020-12-22 18:57:05,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721321885] [2020-12-22 18:57:05,649 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:05,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-22 18:57:05,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:05,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 18:57:05,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:05,800 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:05,801 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 18:57:05,802 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:05,816 INFO L625 ElimStorePlain]: treesize reduction 10, result has 60.0 percent of original size [2020-12-22 18:57:05,817 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:05,817 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:9, output treesize:5 [2020-12-22 18:57:06,124 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-22 18:57:06,125 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:06,130 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:06,131 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:06,131 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-12-22 18:57:06,988 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2020-12-22 18:57:06,990 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:57:07,011 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:07,017 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 18:57:07,035 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:07,035 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2020-12-22 18:57:07,038 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:07,086 INFO L625 ElimStorePlain]: treesize reduction 12, result has 75.5 percent of original size [2020-12-22 18:57:07,089 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:07,089 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:55, output treesize:8 [2020-12-22 18:57:07,166 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 41 proven. 62 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 18:57:07,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:07,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22] total 36 [2020-12-22 18:57:07,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17151444] [2020-12-22 18:57:07,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 18:57:07,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:07,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 18:57:07,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1151, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 18:57:07,168 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand 36 states. [2020-12-22 18:57:10,741 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-12-22 18:57:10,969 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-12-22 18:57:11,545 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-22 18:57:12,026 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-12-22 18:57:12,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:12,387 INFO L93 Difference]: Finished difference Result 239 states and 243 transitions. [2020-12-22 18:57:12,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 18:57:12,388 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 79 [2020-12-22 18:57:12,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:12,389 INFO L225 Difference]: With dead ends: 239 [2020-12-22 18:57:12,389 INFO L226 Difference]: Without dead ends: 108 [2020-12-22 18:57:12,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1317 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=761, Invalid=5881, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 18:57:12,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-22 18:57:12,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 102. [2020-12-22 18:57:12,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-22 18:57:12,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2020-12-22 18:57:12,393 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 79 [2020-12-22 18:57:12,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:12,394 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2020-12-22 18:57:12,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 18:57:12,394 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2020-12-22 18:57:12,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 18:57:12,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:12,395 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:12,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:12,597 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:57:12,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:12,597 INFO L82 PathProgramCache]: Analyzing trace with hash -418354157, now seen corresponding path program 7 times [2020-12-22 18:57:12,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:12,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741039756] [2020-12-22 18:57:12,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 18:57:12,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741039756] [2020-12-22 18:57:12,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29687377] [2020-12-22 18:57:12,874 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:12,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 18:57:12,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:12,997 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_33|], 1=[|v_#valid_33|]} [2020-12-22 18:57:13,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 18:57:13,002 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 18:57:13,003 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:13,014 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:13,019 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 18:57:13,020 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:13,031 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:13,032 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:13,033 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 18:57:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 18:57:13,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:13,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-12-22 18:57:13,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741836039] [2020-12-22 18:57:13,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 18:57:13,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:13,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 18:57:13,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-12-22 18:57:13,511 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand 27 states. [2020-12-22 18:57:14,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:14,518 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2020-12-22 18:57:14,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 18:57:14,518 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 87 [2020-12-22 18:57:14,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:14,521 INFO L225 Difference]: With dead ends: 115 [2020-12-22 18:57:14,522 INFO L226 Difference]: Without dead ends: 115 [2020-12-22 18:57:14,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=260, Invalid=1222, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 18:57:14,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-22 18:57:14,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2020-12-22 18:57:14,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-22 18:57:14,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 117 transitions. [2020-12-22 18:57:14,525 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 117 transitions. Word has length 87 [2020-12-22 18:57:14,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:14,526 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 117 transitions. [2020-12-22 18:57:14,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 18:57:14,526 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 117 transitions. [2020-12-22 18:57:14,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 18:57:14,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:14,526 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:14,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 18:57:14,742 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:57:14,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:14,743 INFO L82 PathProgramCache]: Analyzing trace with hash -771190887, now seen corresponding path program 5 times [2020-12-22 18:57:14,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:14,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137430657] [2020-12-22 18:57:14,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:14,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 15 proven. 125 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 18:57:15,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137430657] [2020-12-22 18:57:15,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043384148] [2020-12-22 18:57:15,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:15,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 18:57:15,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:15,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 18:57:15,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:15,261 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:15,262 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 18:57:15,263 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:15,282 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 18:57:15,284 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:15,285 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 18:57:15,551 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 28 proven. 112 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 18:57:15,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:15,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 21 [2020-12-22 18:57:15,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489315435] [2020-12-22 18:57:15,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 18:57:15,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:15,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 18:57:15,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-12-22 18:57:15,553 INFO L87 Difference]: Start difference. First operand 111 states and 117 transitions. Second operand 22 states. [2020-12-22 18:57:16,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:16,187 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2020-12-22 18:57:16,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 18:57:16,188 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 91 [2020-12-22 18:57:16,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:16,189 INFO L225 Difference]: With dead ends: 113 [2020-12-22 18:57:16,189 INFO L226 Difference]: Without dead ends: 109 [2020-12-22 18:57:16,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2020-12-22 18:57:16,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-22 18:57:16,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-12-22 18:57:16,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-22 18:57:16,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2020-12-22 18:57:16,193 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 91 [2020-12-22 18:57:16,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:16,194 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2020-12-22 18:57:16,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 18:57:16,194 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2020-12-22 18:57:16,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 18:57:16,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:16,194 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:16,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 18:57:16,409 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:57:16,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:16,409 INFO L82 PathProgramCache]: Analyzing trace with hash -767633183, now seen corresponding path program 8 times [2020-12-22 18:57:16,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:16,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667333213] [2020-12-22 18:57:16,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:16,889 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 130 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 18:57:16,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667333213] [2020-12-22 18:57:16,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363248931] [2020-12-22 18:57:16,889 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:17,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 18:57:17,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:17,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 18:57:17,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:17,349 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 18:57:17,351 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:17,357 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:17,358 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:57:17,359 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 18:57:18,491 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:18,491 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 52 [2020-12-22 18:57:18,493 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:18,525 INFO L625 ElimStorePlain]: treesize reduction 21, result has 52.3 percent of original size [2020-12-22 18:57:18,528 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:18,528 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:39, output treesize:8 [2020-12-22 18:57:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 6 proven. 150 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 18:57:18,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:18,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 39 [2020-12-22 18:57:18,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186190704] [2020-12-22 18:57:18,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 18:57:18,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:18,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 18:57:18,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1400, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 18:57:18,616 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand 39 states. [2020-12-22 18:57:22,910 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-12-22 18:57:24,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:24,207 INFO L93 Difference]: Finished difference Result 279 states and 283 transitions. [2020-12-22 18:57:24,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-22 18:57:24,208 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 94 [2020-12-22 18:57:24,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:24,208 INFO L225 Difference]: With dead ends: 279 [2020-12-22 18:57:24,209 INFO L226 Difference]: Without dead ends: 123 [2020-12-22 18:57:24,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=567, Invalid=6075, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 18:57:24,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-22 18:57:24,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2020-12-22 18:57:24,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-22 18:57:24,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2020-12-22 18:57:24,215 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 94 [2020-12-22 18:57:24,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:24,215 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2020-12-22 18:57:24,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 18:57:24,215 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2020-12-22 18:57:24,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-22 18:57:24,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:24,216 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:24,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 18:57:24,423 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:57:24,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:24,423 INFO L82 PathProgramCache]: Analyzing trace with hash 913329115, now seen corresponding path program 9 times [2020-12-22 18:57:24,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:24,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530752413] [2020-12-22 18:57:24,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 28 proven. 149 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-22 18:57:24,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530752413] [2020-12-22 18:57:24,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247584074] [2020-12-22 18:57:24,776 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:25,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-22 18:57:25,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:25,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 18:57:25,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:26,014 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-22 18:57:26,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:26,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2020-12-22 18:57:26,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853609572] [2020-12-22 18:57:26,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 18:57:26,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:26,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 18:57:26,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 18:57:26,016 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand 33 states. [2020-12-22 18:57:26,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:26,685 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2020-12-22 18:57:26,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 18:57:26,686 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 102 [2020-12-22 18:57:26,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:26,688 INFO L225 Difference]: With dead ends: 130 [2020-12-22 18:57:26,688 INFO L226 Difference]: Without dead ends: 130 [2020-12-22 18:57:26,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=366, Invalid=1356, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 18:57:26,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-22 18:57:26,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2020-12-22 18:57:26,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-22 18:57:26,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2020-12-22 18:57:26,692 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 102 [2020-12-22 18:57:26,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:26,693 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2020-12-22 18:57:26,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 18:57:26,693 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2020-12-22 18:57:26,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 18:57:26,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:26,694 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:26,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 18:57:26,907 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:57:26,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:26,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1419555999, now seen corresponding path program 6 times [2020-12-22 18:57:26,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:26,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379454670] [2020-12-22 18:57:26,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:26,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 28 proven. 173 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-22 18:57:27,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379454670] [2020-12-22 18:57:27,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512845752] [2020-12-22 18:57:27,300 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:27,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 18:57:27,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:27,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 18:57:27,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:27,580 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:27,582 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 18:57:27,583 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:27,603 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 18:57:27,605 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:27,606 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 18:57:28,285 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 45 proven. 156 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-22 18:57:28,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:28,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2020-12-22 18:57:28,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792093823] [2020-12-22 18:57:28,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 18:57:28,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:28,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 18:57:28,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 18:57:28,287 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand 34 states. [2020-12-22 18:57:29,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:29,319 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2020-12-22 18:57:29,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 18:57:29,320 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 106 [2020-12-22 18:57:29,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:29,321 INFO L225 Difference]: With dead ends: 128 [2020-12-22 18:57:29,321 INFO L226 Difference]: Without dead ends: 124 [2020-12-22 18:57:29,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=349, Invalid=1373, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 18:57:29,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-22 18:57:29,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-12-22 18:57:29,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-22 18:57:29,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2020-12-22 18:57:29,325 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 106 [2020-12-22 18:57:29,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:29,325 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2020-12-22 18:57:29,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 18:57:29,326 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2020-12-22 18:57:29,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 18:57:29,326 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:29,326 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:29,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 18:57:29,539 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:57:29,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:29,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1744754663, now seen corresponding path program 10 times [2020-12-22 18:57:29,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:29,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062798493] [2020-12-22 18:57:29,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:30,147 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 31 proven. 189 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-22 18:57:30,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062798493] [2020-12-22 18:57:30,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016223941] [2020-12-22 18:57:30,148 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 [2020-12-22 18:57:30,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 18:57:30,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:30,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 18:57:30,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:30,277 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:30,277 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 18:57:30,279 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:30,301 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 18:57:30,303 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:30,304 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 18:57:30,774 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-22 18:57:30,775 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:30,780 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:30,781 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:30,781 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-22 18:57:31,727 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2020-12-22 18:57:31,729 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:57:31,746 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:31,752 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 18:57:31,771 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:31,772 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 43 [2020-12-22 18:57:31,773 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:31,813 INFO L625 ElimStorePlain]: treesize reduction 9, result has 76.9 percent of original size [2020-12-22 18:57:31,816 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:31,817 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:49, output treesize:8 [2020-12-22 18:57:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 142 proven. 78 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-22 18:57:31,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:31,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26] total 44 [2020-12-22 18:57:31,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508505459] [2020-12-22 18:57:31,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 18:57:31,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:31,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 18:57:31,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1717, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 18:57:31,926 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand 44 states. [2020-12-22 18:57:33,736 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-12-22 18:57:35,229 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-12-22 18:57:35,676 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 18:57:36,132 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 18:57:36,634 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-12-22 18:57:36,845 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 18:57:37,089 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-12-22 18:57:38,213 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 18:57:38,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:38,620 INFO L93 Difference]: Finished difference Result 319 states and 323 transitions. [2020-12-22 18:57:38,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-22 18:57:38,621 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 109 [2020-12-22 18:57:38,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:38,622 INFO L225 Difference]: With dead ends: 319 [2020-12-22 18:57:38,622 INFO L226 Difference]: Without dead ends: 138 [2020-12-22 18:57:38,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1049, Invalid=8457, Unknown=0, NotChecked=0, Total=9506 [2020-12-22 18:57:38,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-22 18:57:38,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2020-12-22 18:57:38,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-22 18:57:38,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2020-12-22 18:57:38,628 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 109 [2020-12-22 18:57:38,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:38,628 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2020-12-22 18:57:38,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 18:57:38,628 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2020-12-22 18:57:38,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 18:57:38,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:38,629 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:38,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:38,844 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:57:38,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:38,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1230781985, now seen corresponding path program 11 times [2020-12-22 18:57:38,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:38,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399910257] [2020-12-22 18:57:38,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:39,238 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 45 proven. 200 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-22 18:57:39,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399910257] [2020-12-22 18:57:39,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304428158] [2020-12-22 18:57:39,239 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 [2020-12-22 18:57:39,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-22 18:57:39,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:39,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 18:57:39,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 66 proven. 179 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-22 18:57:40,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:40,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2020-12-22 18:57:40,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178308439] [2020-12-22 18:57:40,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 18:57:40,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:40,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 18:57:40,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2020-12-22 18:57:40,024 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand 29 states. [2020-12-22 18:57:41,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:41,152 INFO L93 Difference]: Finished difference Result 145 states and 149 transitions. [2020-12-22 18:57:41,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 18:57:41,153 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 117 [2020-12-22 18:57:41,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:41,155 INFO L225 Difference]: With dead ends: 145 [2020-12-22 18:57:41,155 INFO L226 Difference]: Without dead ends: 145 [2020-12-22 18:57:41,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=336, Invalid=1146, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 18:57:41,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-22 18:57:41,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 141. [2020-12-22 18:57:41,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-22 18:57:41,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 147 transitions. [2020-12-22 18:57:41,159 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 147 transitions. Word has length 117 [2020-12-22 18:57:41,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:41,159 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 147 transitions. [2020-12-22 18:57:41,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 18:57:41,159 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 147 transitions. [2020-12-22 18:57:41,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 18:57:41,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:41,160 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:41,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 18:57:41,361 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:57:41,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:41,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1495539557, now seen corresponding path program 7 times [2020-12-22 18:57:41,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:41,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936228816] [2020-12-22 18:57:41,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:41,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 45 proven. 228 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-22 18:57:41,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936228816] [2020-12-22 18:57:41,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905780041] [2020-12-22 18:57:41,851 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:41,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:41,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 18:57:41,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 66 proven. 207 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-22 18:57:42,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:42,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2020-12-22 18:57:42,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838182166] [2020-12-22 18:57:42,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 18:57:42,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:42,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 18:57:42,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2020-12-22 18:57:42,447 INFO L87 Difference]: Start difference. First operand 141 states and 147 transitions. Second operand 31 states. [2020-12-22 18:57:43,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:43,379 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2020-12-22 18:57:43,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 18:57:43,380 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 121 [2020-12-22 18:57:43,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:43,381 INFO L225 Difference]: With dead ends: 143 [2020-12-22 18:57:43,381 INFO L226 Difference]: Without dead ends: 139 [2020-12-22 18:57:43,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=336, Invalid=1224, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 18:57:43,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-22 18:57:43,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-12-22 18:57:43,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-22 18:57:43,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2020-12-22 18:57:43,385 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 121 [2020-12-22 18:57:43,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:43,385 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2020-12-22 18:57:43,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 18:57:43,386 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2020-12-22 18:57:43,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 18:57:43,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:43,386 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:43,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:43,602 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:57:43,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:43,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1923196309, now seen corresponding path program 12 times [2020-12-22 18:57:43,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:43,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470343002] [2020-12-22 18:57:43,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 36 proven. 259 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-22 18:57:44,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470343002] [2020-12-22 18:57:44,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464542405] [2020-12-22 18:57:44,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:44,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-22 18:57:44,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:57:44,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-22 18:57:44,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:45,292 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 18:57:45,293 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:45,302 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:45,303 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:57:45,304 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 18:57:46,981 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:46,982 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 52 [2020-12-22 18:57:46,985 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:47,028 INFO L625 ElimStorePlain]: treesize reduction 21, result has 52.3 percent of original size [2020-12-22 18:57:47,032 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:47,032 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:39, output treesize:8 [2020-12-22 18:57:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 8 proven. 287 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-22 18:57:47,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:47,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27] total 47 [2020-12-22 18:57:47,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067824990] [2020-12-22 18:57:47,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 18:57:47,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:47,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 18:57:47,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2064, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 18:57:47,175 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand 47 states. [2020-12-22 18:57:54,521 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-12-22 18:57:56,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:57:56,073 INFO L93 Difference]: Finished difference Result 359 states and 363 transitions. [2020-12-22 18:57:56,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-22 18:57:56,074 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 124 [2020-12-22 18:57:56,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:57:56,077 INFO L225 Difference]: With dead ends: 359 [2020-12-22 18:57:56,077 INFO L226 Difference]: Without dead ends: 153 [2020-12-22 18:57:56,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=667, Invalid=8839, Unknown=0, NotChecked=0, Total=9506 [2020-12-22 18:57:56,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-22 18:57:56,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2020-12-22 18:57:56,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-22 18:57:56,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2020-12-22 18:57:56,080 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 124 [2020-12-22 18:57:56,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:57:56,080 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2020-12-22 18:57:56,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 18:57:56,080 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2020-12-22 18:57:56,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 18:57:56,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:57:56,081 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:57:56,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-22 18:57:56,281 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:57:56,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:57:56,282 INFO L82 PathProgramCache]: Analyzing trace with hash -604772593, now seen corresponding path program 13 times [2020-12-22 18:57:56,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:57:56,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96723306] [2020-12-22 18:57:56,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:57:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 66 proven. 258 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-22 18:57:56,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96723306] [2020-12-22 18:57:56,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089989173] [2020-12-22 18:57:56,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:57:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:57:56,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-22 18:57:56,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:57:56,953 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_37|], 1=[|v_#valid_34|]} [2020-12-22 18:57:56,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 18:57:56,959 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 18:57:56,960 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:56,972 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:56,979 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 18:57:56,981 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 18:57:56,992 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:57:56,993 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:57:56,994 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 18:57:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 91 proven. 233 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-22 18:57:58,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:57:58,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2020-12-22 18:57:58,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582042233] [2020-12-22 18:57:58,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 18:57:58,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:57:58,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 18:57:58,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1348, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 18:57:58,067 INFO L87 Difference]: Start difference. First operand 147 states and 150 transitions. Second operand 39 states. [2020-12-22 18:58:00,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:58:00,011 INFO L93 Difference]: Finished difference Result 160 states and 164 transitions. [2020-12-22 18:58:00,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 18:58:00,012 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 132 [2020-12-22 18:58:00,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:58:00,014 INFO L225 Difference]: With dead ends: 160 [2020-12-22 18:58:00,014 INFO L226 Difference]: Without dead ends: 160 [2020-12-22 18:58:00,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=533, Invalid=2659, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 18:58:00,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-22 18:58:00,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2020-12-22 18:58:00,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-12-22 18:58:00,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 162 transitions. [2020-12-22 18:58:00,019 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 162 transitions. Word has length 132 [2020-12-22 18:58:00,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:58:00,020 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 162 transitions. [2020-12-22 18:58:00,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 18:58:00,020 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 162 transitions. [2020-12-22 18:58:00,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 18:58:00,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:58:00,021 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:58:00,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:00,237 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:58:00,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:58:00,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1652436117, now seen corresponding path program 8 times [2020-12-22 18:58:00,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:58:00,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023709433] [2020-12-22 18:58:00,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:58:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:58:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 66 proven. 290 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-22 18:58:00,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023709433] [2020-12-22 18:58:00,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865240081] [2020-12-22 18:58:00,777 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:00,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 18:58:00,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:58:00,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 18:58:00,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:58:00,943 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:00,943 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 18:58:00,945 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:00,969 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 18:58:00,971 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:58:00,971 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 18:58:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 91 proven. 265 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-22 18:58:01,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:58:01,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2020-12-22 18:58:01,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012758810] [2020-12-22 18:58:01,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 18:58:01,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:58:01,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 18:58:01,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1437, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 18:58:01,987 INFO L87 Difference]: Start difference. First operand 156 states and 162 transitions. Second operand 41 states. [2020-12-22 18:58:03,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:58:03,511 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2020-12-22 18:58:03,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 18:58:03,512 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 136 [2020-12-22 18:58:03,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:58:03,513 INFO L225 Difference]: With dead ends: 158 [2020-12-22 18:58:03,513 INFO L226 Difference]: Without dead ends: 154 [2020-12-22 18:58:03,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=450, Invalid=2100, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 18:58:03,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-22 18:58:03,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2020-12-22 18:58:03,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-22 18:58:03,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 157 transitions. [2020-12-22 18:58:03,519 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 157 transitions. Word has length 136 [2020-12-22 18:58:03,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:58:03,519 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 157 transitions. [2020-12-22 18:58:03,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 18:58:03,519 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 157 transitions. [2020-12-22 18:58:03,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 18:58:03,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:58:03,520 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:58:03,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-22 18:58:03,736 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:58:03,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:58:03,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1190770075, now seen corresponding path program 14 times [2020-12-22 18:58:03,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:58:03,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034568678] [2020-12-22 18:58:03,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:58:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:58:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 41 proven. 340 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-22 18:58:04,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034568678] [2020-12-22 18:58:04,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799143433] [2020-12-22 18:58:04,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:04,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 18:58:04,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:58:04,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-22 18:58:04,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:58:05,445 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 18:58:05,446 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:05,454 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:05,455 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:58:05,455 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 18:58:07,312 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:07,313 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 52 [2020-12-22 18:58:07,315 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:07,351 INFO L625 ElimStorePlain]: treesize reduction 17, result has 61.4 percent of original size [2020-12-22 18:58:07,355 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:58:07,355 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:39, output treesize:8 [2020-12-22 18:58:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 9 proven. 372 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-22 18:58:07,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:58:07,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29] total 51 [2020-12-22 18:58:07,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453102652] [2020-12-22 18:58:07,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 18:58:07,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:58:07,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 18:58:07,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2444, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 18:58:07,501 INFO L87 Difference]: Start difference. First operand 154 states and 157 transitions. Second operand 51 states. [2020-12-22 18:58:16,128 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-12-22 18:58:17,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:58:17,824 INFO L93 Difference]: Finished difference Result 399 states and 403 transitions. [2020-12-22 18:58:17,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-22 18:58:17,825 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 139 [2020-12-22 18:58:17,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:58:17,826 INFO L225 Difference]: With dead ends: 399 [2020-12-22 18:58:17,827 INFO L226 Difference]: Without dead ends: 168 [2020-12-22 18:58:17,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1655 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=717, Invalid=10413, Unknown=0, NotChecked=0, Total=11130 [2020-12-22 18:58:17,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-22 18:58:17,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 162. [2020-12-22 18:58:17,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-22 18:58:17,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 165 transitions. [2020-12-22 18:58:17,834 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 165 transitions. Word has length 139 [2020-12-22 18:58:17,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:58:17,835 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 165 transitions. [2020-12-22 18:58:17,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 18:58:17,835 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 165 transitions. [2020-12-22 18:58:17,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 18:58:17,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:58:17,836 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:58:18,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:18,050 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:58:18,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:58:18,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2139702699, now seen corresponding path program 15 times [2020-12-22 18:58:18,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:58:18,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975615627] [2020-12-22 18:58:18,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:58:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:58:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 91 proven. 323 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-12-22 18:58:18,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975615627] [2020-12-22 18:58:18,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030307199] [2020-12-22 18:58:18,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:19,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 18:58:19,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:58:19,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 18:58:19,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:58:19,996 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_39|], 1=[|v_#valid_35|]} [2020-12-22 18:58:20,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 18:58:20,002 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 18:58:20,003 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:20,016 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:20,022 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 18:58:20,029 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:20,040 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:20,042 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:58:20,042 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 18:58:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 120 proven. 294 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-12-22 18:58:21,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:58:21,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 43 [2020-12-22 18:58:21,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894235337] [2020-12-22 18:58:21,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 18:58:21,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:58:21,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 18:58:21,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1695, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 18:58:21,475 INFO L87 Difference]: Start difference. First operand 162 states and 165 transitions. Second operand 44 states. [2020-12-22 18:58:24,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:58:24,200 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2020-12-22 18:58:24,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 18:58:24,201 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 147 [2020-12-22 18:58:24,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:58:24,202 INFO L225 Difference]: With dead ends: 175 [2020-12-22 18:58:24,203 INFO L226 Difference]: Without dead ends: 175 [2020-12-22 18:58:24,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=738, Invalid=3294, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 18:58:24,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-22 18:58:24,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2020-12-22 18:58:24,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-22 18:58:24,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 177 transitions. [2020-12-22 18:58:24,206 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 177 transitions. Word has length 147 [2020-12-22 18:58:24,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:58:24,207 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 177 transitions. [2020-12-22 18:58:24,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 18:58:24,207 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 177 transitions. [2020-12-22 18:58:24,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-22 18:58:24,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:58:24,208 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:58:24,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 18:58:24,414 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:58:24,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:58:24,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1758125361, now seen corresponding path program 9 times [2020-12-22 18:58:24,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:58:24,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835580754] [2020-12-22 18:58:24,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:58:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:58:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 91 proven. 359 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-12-22 18:58:25,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835580754] [2020-12-22 18:58:25,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660486248] [2020-12-22 18:58:25,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:26,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 18:58:26,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:58:26,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 18:58:26,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:58:26,140 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:26,141 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 18:58:26,142 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:26,168 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 18:58:26,170 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:58:26,170 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 18:58:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 120 proven. 330 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-12-22 18:58:27,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:58:27,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2020-12-22 18:58:27,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321198175] [2020-12-22 18:58:27,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 18:58:27,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:58:27,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 18:58:27,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1792, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 18:58:27,435 INFO L87 Difference]: Start difference. First operand 171 states and 177 transitions. Second operand 46 states. [2020-12-22 18:58:29,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:58:29,435 INFO L93 Difference]: Finished difference Result 173 states and 177 transitions. [2020-12-22 18:58:29,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 18:58:29,436 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 151 [2020-12-22 18:58:29,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:58:29,438 INFO L225 Difference]: With dead ends: 173 [2020-12-22 18:58:29,438 INFO L226 Difference]: Without dead ends: 169 [2020-12-22 18:58:29,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=625, Invalid=2567, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 18:58:29,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-22 18:58:29,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2020-12-22 18:58:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-22 18:58:29,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 172 transitions. [2020-12-22 18:58:29,442 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 172 transitions. Word has length 151 [2020-12-22 18:58:29,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:58:29,442 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 172 transitions. [2020-12-22 18:58:29,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 18:58:29,442 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 172 transitions. [2020-12-22 18:58:29,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-22 18:58:29,443 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:58:29,443 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:58:29,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:29,659 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:58:29,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:58:29,659 INFO L82 PathProgramCache]: Analyzing trace with hash -813530039, now seen corresponding path program 16 times [2020-12-22 18:58:29,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:58:29,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865731463] [2020-12-22 18:58:29,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:58:29,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:58:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 46 proven. 432 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-12-22 18:58:30,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865731463] [2020-12-22 18:58:30,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677657889] [2020-12-22 18:58:30,655 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:30,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 18:58:30,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:58:30,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-22 18:58:30,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:58:30,831 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:30,832 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 18:58:30,833 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:30,858 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 18:58:30,860 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:58:30,860 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 18:58:31,889 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-22 18:58:31,891 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:31,897 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:31,898 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:58:31,898 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-22 18:58:33,504 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2020-12-22 18:58:33,507 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:58:33,528 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:33,534 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 18:58:33,558 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:33,558 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 43 [2020-12-22 18:58:33,562 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:33,617 INFO L625 ElimStorePlain]: treesize reduction 12, result has 71.4 percent of original size [2020-12-22 18:58:33,621 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:58:33,621 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:49, output treesize:8 [2020-12-22 18:58:33,781 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 307 proven. 171 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-12-22 18:58:33,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:58:33,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 32] total 56 [2020-12-22 18:58:33,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161553827] [2020-12-22 18:58:33,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 18:58:33,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:58:33,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 18:58:33,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=2815, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 18:58:33,783 INFO L87 Difference]: Start difference. First operand 169 states and 172 transitions. Second operand 56 states. [2020-12-22 18:58:36,892 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-12-22 18:58:37,654 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 18:58:38,207 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 18:58:38,766 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 18:58:39,327 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 18:58:39,883 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 18:58:40,461 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 18:58:41,033 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 18:58:41,613 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 18:58:42,224 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-12-22 18:58:42,465 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 18:58:42,741 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-12-22 18:58:43,936 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-12-22 18:58:44,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:58:44,671 INFO L93 Difference]: Finished difference Result 439 states and 443 transitions. [2020-12-22 18:58:44,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-22 18:58:44,672 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 154 [2020-12-22 18:58:44,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:58:44,674 INFO L225 Difference]: With dead ends: 439 [2020-12-22 18:58:44,674 INFO L226 Difference]: Without dead ends: 183 [2020-12-22 18:58:44,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3121 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1496, Invalid=14004, Unknown=0, NotChecked=0, Total=15500 [2020-12-22 18:58:44,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-12-22 18:58:44,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 177. [2020-12-22 18:58:44,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-22 18:58:44,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 180 transitions. [2020-12-22 18:58:44,678 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 180 transitions. Word has length 154 [2020-12-22 18:58:44,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:58:44,678 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 180 transitions. [2020-12-22 18:58:44,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 18:58:44,679 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 180 transitions. [2020-12-22 18:58:44,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-22 18:58:44,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:58:44,679 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:58:44,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 18:58:44,880 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:58:44,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:58:44,881 INFO L82 PathProgramCache]: Analyzing trace with hash -160615357, now seen corresponding path program 17 times [2020-12-22 18:58:44,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:58:44,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872962266] [2020-12-22 18:58:44,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:58:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:58:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 120 proven. 395 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-12-22 18:58:45,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872962266] [2020-12-22 18:58:45,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264366894] [2020-12-22 18:58:45,629 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:46,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-22 18:58:46,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:58:46,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-22 18:58:46,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:58:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 153 proven. 362 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-12-22 18:58:47,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:58:47,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 37 [2020-12-22 18:58:47,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737743462] [2020-12-22 18:58:47,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 18:58:47,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:58:47,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 18:58:47,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 18:58:47,406 INFO L87 Difference]: Start difference. First operand 177 states and 180 transitions. Second operand 38 states. [2020-12-22 18:58:49,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:58:49,296 INFO L93 Difference]: Finished difference Result 190 states and 194 transitions. [2020-12-22 18:58:49,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 18:58:49,297 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 162 [2020-12-22 18:58:49,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:58:49,301 INFO L225 Difference]: With dead ends: 190 [2020-12-22 18:58:49,301 INFO L226 Difference]: Without dead ends: 190 [2020-12-22 18:58:49,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=570, Invalid=1980, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 18:58:49,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-22 18:58:49,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2020-12-22 18:58:49,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-22 18:58:49,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 192 transitions. [2020-12-22 18:58:49,311 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 192 transitions. Word has length 162 [2020-12-22 18:58:49,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:58:49,311 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 192 transitions. [2020-12-22 18:58:49,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 18:58:49,311 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 192 transitions. [2020-12-22 18:58:49,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 18:58:49,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:58:49,312 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:58:49,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 18:58:49,527 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:58:49,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:58:49,527 INFO L82 PathProgramCache]: Analyzing trace with hash -664420407, now seen corresponding path program 10 times [2020-12-22 18:58:49,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:58:49,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022414506] [2020-12-22 18:58:49,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:58:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:58:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 120 proven. 435 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-12-22 18:58:50,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022414506] [2020-12-22 18:58:50,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241236322] [2020-12-22 18:58:50,375 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:58:50,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 18:58:50,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:58:50,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-22 18:58:50,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:58:50,575 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:50,576 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 18:58:50,577 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:50,606 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 18:58:50,608 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:58:50,608 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 18:58:50,856 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-22 18:58:50,857 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:50,867 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:50,868 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:58:50,868 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-22 18:58:52,362 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:52,362 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 54 [2020-12-22 18:58:52,364 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:58:52,408 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:58:52,410 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 18:58:52,414 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:58:52,415 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:28 [2020-12-22 18:58:52,530 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:58:52,531 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:58:52,533 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:58:52,533 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:58:52,535 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 18:58:52,867 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 162 proven. 393 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-12-22 18:58:52,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:58:52,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 32] total 46 [2020-12-22 18:58:52,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232856415] [2020-12-22 18:58:52,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 18:58:52,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:58:52,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 18:58:52,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2004, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 18:58:52,869 INFO L87 Difference]: Start difference. First operand 186 states and 192 transitions. Second operand 47 states. [2020-12-22 18:58:57,337 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-12-22 18:58:57,546 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-12-22 18:58:57,773 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-12-22 18:58:58,020 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-12-22 18:58:58,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:58:58,519 INFO L93 Difference]: Finished difference Result 188 states and 192 transitions. [2020-12-22 18:58:58,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 18:58:58,520 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 166 [2020-12-22 18:58:58,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:58:58,522 INFO L225 Difference]: With dead ends: 188 [2020-12-22 18:58:58,523 INFO L226 Difference]: Without dead ends: 184 [2020-12-22 18:58:58,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=627, Invalid=3795, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 18:58:58,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-12-22 18:58:58,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2020-12-22 18:58:58,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-22 18:58:58,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 187 transitions. [2020-12-22 18:58:58,526 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 187 transitions. Word has length 166 [2020-12-22 18:58:58,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:58:58,527 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 187 transitions. [2020-12-22 18:58:58,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 18:58:58,527 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 187 transitions. [2020-12-22 18:58:58,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-22 18:58:58,528 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:58:58,528 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:58:58,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 18:58:58,733 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:58:58,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:58:58,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1755937457, now seen corresponding path program 18 times [2020-12-22 18:58:58,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:58:58,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235467232] [2020-12-22 18:58:58,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:58:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 51 proven. 535 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-12-22 18:59:00,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235467232] [2020-12-22 18:59:00,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67697633] [2020-12-22 18:59:00,027 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:59:02,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-12-22 18:59:02,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:59:02,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-22 18:59:02,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:59:02,380 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_43|], 1=[|v_#valid_36|]} [2020-12-22 18:59:02,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 18:59:02,386 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 18:59:02,387 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:02,401 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:02,408 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 18:59:02,410 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:02,424 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:02,426 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:59:02,427 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:21, output treesize:9 [2020-12-22 18:59:03,879 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-22 18:59:03,881 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:03,894 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:03,895 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:59:03,896 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-12-22 18:59:06,817 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2020-12-22 18:59:06,819 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:59:06,849 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:06,857 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 18:59:06,886 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:06,886 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2020-12-22 18:59:06,888 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:06,969 INFO L625 ElimStorePlain]: treesize reduction 16, result has 67.3 percent of original size [2020-12-22 18:59:06,973 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:59:06,974 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:55, output treesize:8 [2020-12-22 18:59:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 376 proven. 210 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-12-22 18:59:07,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:59:07,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 33] total 59 [2020-12-22 18:59:07,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88316741] [2020-12-22 18:59:07,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-22 18:59:07,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:07,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-22 18:59:07,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=3140, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 18:59:07,219 INFO L87 Difference]: Start difference. First operand 184 states and 187 transitions. Second operand 59 states. [2020-12-22 18:59:12,002 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 18:59:13,102 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-22 18:59:13,874 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-22 18:59:14,643 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-22 18:59:15,393 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-22 18:59:16,175 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-12-22 18:59:16,990 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-22 18:59:17,762 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-22 18:59:18,587 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-22 18:59:19,405 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-12-22 18:59:20,237 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 18:59:20,567 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 18:59:20,956 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-12-22 18:59:22,034 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-12-22 18:59:22,327 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-12-22 18:59:22,633 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-12-22 18:59:22,966 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-22 18:59:23,264 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-22 18:59:23,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:23,687 INFO L93 Difference]: Finished difference Result 479 states and 483 transitions. [2020-12-22 18:59:23,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-12-22 18:59:23,689 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 169 [2020-12-22 18:59:23,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:23,691 INFO L225 Difference]: With dead ends: 479 [2020-12-22 18:59:23,691 INFO L226 Difference]: Without dead ends: 198 [2020-12-22 18:59:23,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3540 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=1614, Invalid=15942, Unknown=0, NotChecked=0, Total=17556 [2020-12-22 18:59:23,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-22 18:59:23,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 192. [2020-12-22 18:59:23,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-22 18:59:23,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 195 transitions. [2020-12-22 18:59:23,697 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 195 transitions. Word has length 169 [2020-12-22 18:59:23,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:23,698 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 195 transitions. [2020-12-22 18:59:23,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-22 18:59:23,698 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 195 transitions. [2020-12-22 18:59:23,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-12-22 18:59:23,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:23,699 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:23,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-12-22 18:59:23,914 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:23,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:23,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1772013705, now seen corresponding path program 19 times [2020-12-22 18:59:23,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:23,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24398773] [2020-12-22 18:59:23,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 153 proven. 474 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-12-22 18:59:24,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24398773] [2020-12-22 18:59:24,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77039303] [2020-12-22 18:59:24,902 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:59:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:25,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-22 18:59:25,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:59:25,110 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_44|], 1=[|v_#valid_37|]} [2020-12-22 18:59:25,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 18:59:25,117 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-22 18:59:25,119 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:25,137 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:25,145 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-22 18:59:25,147 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:25,165 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:25,167 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:59:25,167 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 18:59:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 190 proven. 437 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-12-22 18:59:27,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:59:27,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-12-22 18:59:27,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125126297] [2020-12-22 18:59:27,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 18:59:27,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:27,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 18:59:27,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2338, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 18:59:27,384 INFO L87 Difference]: Start difference. First operand 192 states and 195 transitions. Second operand 51 states. [2020-12-22 18:59:31,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:31,815 INFO L93 Difference]: Finished difference Result 205 states and 209 transitions. [2020-12-22 18:59:31,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 18:59:31,818 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 177 [2020-12-22 18:59:31,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:31,819 INFO L225 Difference]: With dead ends: 205 [2020-12-22 18:59:31,819 INFO L226 Difference]: Without dead ends: 205 [2020-12-22 18:59:31,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=905, Invalid=4645, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 18:59:31,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-12-22 18:59:31,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 201. [2020-12-22 18:59:31,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-12-22 18:59:31,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 207 transitions. [2020-12-22 18:59:31,825 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 207 transitions. Word has length 177 [2020-12-22 18:59:31,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:31,825 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 207 transitions. [2020-12-22 18:59:31,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 18:59:31,825 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 207 transitions. [2020-12-22 18:59:31,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-12-22 18:59:31,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:31,826 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:32,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:59:32,036 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:32,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:32,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1954739971, now seen corresponding path program 11 times [2020-12-22 18:59:32,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:32,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927605443] [2020-12-22 18:59:32,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:33,298 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 153 proven. 518 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-12-22 18:59:33,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927605443] [2020-12-22 18:59:33,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734448976] [2020-12-22 18:59:33,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:59:34,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 18:59:34,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:59:34,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-22 18:59:34,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:59:34,484 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:34,485 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-22 18:59:34,487 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:34,526 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 18:59:34,530 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:59:34,531 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 18:59:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 190 proven. 481 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-12-22 18:59:36,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:59:36,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2020-12-22 18:59:36,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234270490] [2020-12-22 18:59:36,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 18:59:36,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:36,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 18:59:36,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=2436, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 18:59:36,866 INFO L87 Difference]: Start difference. First operand 201 states and 207 transitions. Second operand 53 states. [2020-12-22 18:59:40,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:59:40,937 INFO L93 Difference]: Finished difference Result 203 states and 207 transitions. [2020-12-22 18:59:40,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 18:59:40,938 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 181 [2020-12-22 18:59:40,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:59:40,940 INFO L225 Difference]: With dead ends: 203 [2020-12-22 18:59:40,940 INFO L226 Difference]: Without dead ends: 199 [2020-12-22 18:59:40,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=720, Invalid=3570, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 18:59:40,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-12-22 18:59:40,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2020-12-22 18:59:40,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-22 18:59:40,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 202 transitions. [2020-12-22 18:59:40,944 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 202 transitions. Word has length 181 [2020-12-22 18:59:40,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:59:40,944 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 202 transitions. [2020-12-22 18:59:40,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 18:59:40,945 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 202 transitions. [2020-12-22 18:59:40,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-12-22 18:59:40,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:59:40,946 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 18:59:41,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-22 18:59:41,160 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 18:59:41,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:59:41,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1803105533, now seen corresponding path program 20 times [2020-12-22 18:59:41,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:59:41,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281972663] [2020-12-22 18:59:41,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:59:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:59:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 56 proven. 649 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-12-22 18:59:43,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281972663] [2020-12-22 18:59:43,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540279138] [2020-12-22 18:59:43,016 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 18:59:43,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 18:59:43,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 18:59:43,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-22 18:59:43,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 18:59:44,762 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 18:59:44,764 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:44,776 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:44,778 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 18:59:44,778 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 18:59:48,949 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 18:59:48,949 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 52 [2020-12-22 18:59:48,953 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 18:59:49,019 INFO L625 ElimStorePlain]: treesize reduction 17, result has 61.4 percent of original size [2020-12-22 18:59:49,024 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 18:59:49,025 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:39, output treesize:8 [2020-12-22 18:59:49,314 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 12 proven. 693 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-12-22 18:59:49,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 18:59:49,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 35] total 63 [2020-12-22 18:59:49,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070943123] [2020-12-22 18:59:49,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-22 18:59:49,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:59:49,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-22 18:59:49,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=3776, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 18:59:49,316 INFO L87 Difference]: Start difference. First operand 199 states and 202 transitions. Second operand 63 states. [2020-12-22 19:00:10,105 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-12-22 19:00:10,563 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-12-22 19:00:11,809 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2020-12-22 19:00:12,190 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-12-22 19:00:12,579 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-12-22 19:00:13,002 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-12-22 19:00:13,385 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 19:00:13,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:13,663 INFO L93 Difference]: Finished difference Result 519 states and 523 transitions. [2020-12-22 19:00:13,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-12-22 19:00:13,665 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 184 [2020-12-22 19:00:13,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:13,666 INFO L225 Difference]: With dead ends: 519 [2020-12-22 19:00:13,666 INFO L226 Difference]: Without dead ends: 213 [2020-12-22 19:00:13,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2426 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=867, Invalid=15903, Unknown=0, NotChecked=0, Total=16770 [2020-12-22 19:00:13,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-12-22 19:00:13,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 207. [2020-12-22 19:00:13,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-22 19:00:13,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 210 transitions. [2020-12-22 19:00:13,673 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 210 transitions. Word has length 184 [2020-12-22 19:00:13,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:13,673 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 210 transitions. [2020-12-22 19:00:13,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-22 19:00:13,673 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 210 transitions. [2020-12-22 19:00:13,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-12-22 19:00:13,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:13,675 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:13,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-22 19:00:13,884 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-22 19:00:13,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:13,885 INFO L82 PathProgramCache]: Analyzing trace with hash -950275209, now seen corresponding path program 21 times [2020-12-22 19:00:13,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:13,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416900649] [2020-12-22 19:00:13,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 190 proven. 560 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-12-22 19:00:15,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416900649] [2020-12-22 19:00:15,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576524426] [2020-12-22 19:00:15,248 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true