/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/openbsd_cstrstr-alloca-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 19:00:50,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 19:00:50,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 19:00:51,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 19:00:51,005 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 19:00:51,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 19:00:51,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 19:00:51,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 19:00:51,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 19:00:51,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 19:00:51,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 19:00:51,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 19:00:51,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 19:00:51,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 19:00:51,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 19:00:51,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 19:00:51,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 19:00:51,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 19:00:51,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 19:00:51,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 19:00:51,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 19:00:51,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 19:00:51,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 19:00:51,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 19:00:51,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 19:00:51,050 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 19:00:51,051 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 19:00:51,052 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 19:00:51,053 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 19:00:51,054 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 19:00:51,055 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 19:00:51,056 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 19:00:51,056 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 19:00:51,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 19:00:51,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 19:00:51,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 19:00:51,059 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 19:00:51,085 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 19:00:51,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 19:00:51,086 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 19:00:51,087 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 19:00:51,087 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 19:00:51,087 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 19:00:51,087 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 19:00:51,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 19:00:51,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 19:00:51,088 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 19:00:51,088 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 19:00:51,089 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 19:00:51,089 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 19:00:51,089 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 19:00:51,089 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 19:00:51,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 19:00:51,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 19:00:51,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 19:00:51,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:00:51,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 19:00:51,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 19:00:51,091 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 19:00:51,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 19:00:51,092 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 19:00:51,092 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 19:00:51,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 19:00:51,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 19:00:51,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 19:00:51,478 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 19:00:51,479 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 19:00:51,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i [2020-12-22 19:00:51,569 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b165caec/3a3011457a0848d880cbde30bd4a97ab/FLAG59bdf56b1 [2020-12-22 19:00:52,288 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 19:00:52,290 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i [2020-12-22 19:00:52,311 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b165caec/3a3011457a0848d880cbde30bd4a97ab/FLAG59bdf56b1 [2020-12-22 19:00:52,556 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b165caec/3a3011457a0848d880cbde30bd4a97ab [2020-12-22 19:00:52,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 19:00:52,566 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 19:00:52,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 19:00:52,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 19:00:52,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 19:00:52,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:00:52" (1/1) ... [2020-12-22 19:00:52,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79a24f8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:52, skipping insertion in model container [2020-12-22 19:00:52,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:00:52" (1/1) ... [2020-12-22 19:00:52,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 19:00:52,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 19:00:53,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:00:53,039 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 19:00:53,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:00:53,143 INFO L208 MainTranslator]: Completed translation [2020-12-22 19:00:53,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:53 WrapperNode [2020-12-22 19:00:53,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 19:00:53,145 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 19:00:53,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 19:00:53,145 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 19:00:53,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:53" (1/1) ... [2020-12-22 19:00:53,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:53" (1/1) ... [2020-12-22 19:00:53,195 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 19:00:53,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 19:00:53,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 19:00:53,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 19:00:53,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:53" (1/1) ... [2020-12-22 19:00:53,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:53" (1/1) ... [2020-12-22 19:00:53,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:53" (1/1) ... [2020-12-22 19:00:53,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:53" (1/1) ... [2020-12-22 19:00:53,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:53" (1/1) ... [2020-12-22 19:00:53,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:53" (1/1) ... [2020-12-22 19:00:53,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:53" (1/1) ... [2020-12-22 19:00:53,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 19:00:53,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 19:00:53,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 19:00:53,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 19:00:53,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:53" (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 19:00:53,385 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 19:00:53,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 19:00:53,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 19:00:53,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 19:00:53,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 19:00:53,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 19:00:54,056 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 19:00:54,057 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2020-12-22 19:00:54,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:00:54 BoogieIcfgContainer [2020-12-22 19:00:54,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 19:00:54,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 19:00:54,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 19:00:54,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 19:00:54,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:00:52" (1/3) ... [2020-12-22 19:00:54,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27f0f87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:00:54, skipping insertion in model container [2020-12-22 19:00:54,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:53" (2/3) ... [2020-12-22 19:00:54,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27f0f87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:00:54, skipping insertion in model container [2020-12-22 19:00:54,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:00:54" (3/3) ... [2020-12-22 19:00:54,067 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrstr-alloca-2.i [2020-12-22 19:00:54,074 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 19:00:54,079 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 25 error locations. [2020-12-22 19:00:54,097 INFO L253 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2020-12-22 19:00:54,119 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 19:00:54,119 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 19:00:54,119 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 19:00:54,119 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 19:00:54,119 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 19:00:54,119 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 19:00:54,120 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 19:00:54,120 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 19:00:54,136 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states. [2020-12-22 19:00:54,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 19:00:54,142 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:54,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:54,144 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:00:54,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:54,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2020-12-22 19:00:54,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:54,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245109008] [2020-12-22 19:00:54,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:54,349 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 19:00:54,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245109008] [2020-12-22 19:00:54,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:54,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:00:54,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509301653] [2020-12-22 19:00:54,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:00:54,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:54,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:00:54,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:00:54,375 INFO L87 Difference]: Start difference. First operand 79 states. Second operand 3 states. [2020-12-22 19:00:54,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:54,487 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2020-12-22 19:00:54,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:00:54,490 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-22 19:00:54,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:54,500 INFO L225 Difference]: With dead ends: 77 [2020-12-22 19:00:54,501 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 19:00:54,502 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 19:00:54,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 19:00:54,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-22 19:00:54,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 19:00:54,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-12-22 19:00:54,543 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 7 [2020-12-22 19:00:54,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:54,543 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-12-22 19:00:54,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:00:54,544 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-12-22 19:00:54,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 19:00:54,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:54,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:54,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 19:00:54,545 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:00:54,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:54,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2020-12-22 19:00:54,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:54,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352116878] [2020-12-22 19:00:54,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:54,663 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 19:00:54,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352116878] [2020-12-22 19:00:54,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:54,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:00:54,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159897391] [2020-12-22 19:00:54,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:00:54,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:54,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:00:54,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:00:54,671 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 5 states. [2020-12-22 19:00:54,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:54,866 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2020-12-22 19:00:54,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:00:54,867 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-22 19:00:54,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:54,869 INFO L225 Difference]: With dead ends: 79 [2020-12-22 19:00:54,869 INFO L226 Difference]: Without dead ends: 79 [2020-12-22 19:00:54,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:00:54,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-22 19:00:54,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2020-12-22 19:00:54,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-22 19:00:54,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-12-22 19:00:54,879 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 7 [2020-12-22 19:00:54,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:54,880 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-12-22 19:00:54,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:00:54,880 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-12-22 19:00:54,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 19:00:54,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:54,881 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:54,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 19:00:54,882 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:00:54,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:54,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1906083540, now seen corresponding path program 1 times [2020-12-22 19:00:54,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:54,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9211937] [2020-12-22 19:00:54,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:54,953 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 19:00:54,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9211937] [2020-12-22 19:00:54,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340697893] [2020-12-22 19:00:54,954 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 19:00:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:55,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 19:00:55,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:55,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:00:55,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2020-12-22 19:00:55,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854639885] [2020-12-22 19:00:55,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:00:55,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:55,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:00:55,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:00:55,246 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 5 states. [2020-12-22 19:00:55,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:55,322 INFO L93 Difference]: Finished difference Result 149 states and 171 transitions. [2020-12-22 19:00:55,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:00:55,323 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-22 19:00:55,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:55,325 INFO L225 Difference]: With dead ends: 149 [2020-12-22 19:00:55,325 INFO L226 Difference]: Without dead ends: 149 [2020-12-22 19:00:55,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:00:55,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-22 19:00:55,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 84. [2020-12-22 19:00:55,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-22 19:00:55,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2020-12-22 19:00:55,338 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 11 [2020-12-22 19:00:55,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:55,339 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2020-12-22 19:00:55,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:00:55,339 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2020-12-22 19:00:55,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 19:00:55,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:55,340 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:55,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 19:00:55,551 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:00:55,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:55,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2020-12-22 19:00:55,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:55,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474766294] [2020-12-22 19:00:55,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:55,660 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 19:00:55,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474766294] [2020-12-22 19:00:55,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975924562] [2020-12-22 19:00:55,661 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 19:00:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:55,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 19:00:55,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:55,811 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_28|], 1=[|v_#valid_36|]} [2020-12-22 19:00:55,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:00:55,837 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 19:00:55,839 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:55,858 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:55,872 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 19:00:55,876 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:55,893 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:55,905 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 19:00:55,905 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 19:00:55,959 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 19:00:55,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:55,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 19:00:55,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926119308] [2020-12-22 19:00:55,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:00:55,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:55,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:00:55,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:00:55,962 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand 6 states. [2020-12-22 19:00:56,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:56,143 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2020-12-22 19:00:56,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:00:56,144 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-22 19:00:56,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:56,152 INFO L225 Difference]: With dead ends: 85 [2020-12-22 19:00:56,152 INFO L226 Difference]: Without dead ends: 85 [2020-12-22 19:00:56,153 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 19:00:56,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-22 19:00:56,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-12-22 19:00:56,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-22 19:00:56,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2020-12-22 19:00:56,163 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 11 [2020-12-22 19:00:56,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:56,164 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2020-12-22 19:00:56,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:00:56,164 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2020-12-22 19:00:56,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 19:00:56,164 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:56,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:56,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:56,370 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:00:56,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:56,372 INFO L82 PathProgramCache]: Analyzing trace with hash -2090265437, now seen corresponding path program 1 times [2020-12-22 19:00:56,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:56,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008704181] [2020-12-22 19:00:56,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:56,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:56,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008704181] [2020-12-22 19:00:56,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:56,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:00:56,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349077153] [2020-12-22 19:00:56,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:00:56,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:56,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:00:56,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:56,447 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand 4 states. [2020-12-22 19:00:56,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:56,487 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2020-12-22 19:00:56,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:00:56,488 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-22 19:00:56,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:56,489 INFO L225 Difference]: With dead ends: 88 [2020-12-22 19:00:56,489 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 19:00:56,490 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 19:00:56,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 19:00:56,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2020-12-22 19:00:56,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-22 19:00:56,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2020-12-22 19:00:56,497 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 13 [2020-12-22 19:00:56,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:56,498 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2020-12-22 19:00:56,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:00:56,498 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2020-12-22 19:00:56,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 19:00:56,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:56,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:56,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 19:00:56,499 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:00:56,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:56,500 INFO L82 PathProgramCache]: Analyzing trace with hash -2090265385, now seen corresponding path program 1 times [2020-12-22 19:00:56,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:56,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991919728] [2020-12-22 19:00:56,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:56,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:56,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991919728] [2020-12-22 19:00:56,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:56,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:00:56,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475870035] [2020-12-22 19:00:56,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:00:56,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:56,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:00:56,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:00:56,540 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand 3 states. [2020-12-22 19:00:56,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:56,604 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2020-12-22 19:00:56,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:00:56,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-12-22 19:00:56,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:56,609 INFO L225 Difference]: With dead ends: 81 [2020-12-22 19:00:56,609 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 19:00:56,618 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 19:00:56,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 19:00:56,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-12-22 19:00:56,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 19:00:56,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-12-22 19:00:56,634 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 13 [2020-12-22 19:00:56,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:56,635 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-12-22 19:00:56,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:00:56,635 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-12-22 19:00:56,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 19:00:56,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:56,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:56,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 19:00:56,639 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:00:56,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:56,640 INFO L82 PathProgramCache]: Analyzing trace with hash -2090265384, now seen corresponding path program 1 times [2020-12-22 19:00:56,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:56,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497603349] [2020-12-22 19:00:56,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:56,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497603349] [2020-12-22 19:00:56,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:56,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 19:00:56,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991986351] [2020-12-22 19:00:56,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:00:56,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:56,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:00:56,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:00:56,778 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 6 states. [2020-12-22 19:00:56,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:56,941 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2020-12-22 19:00:56,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:00:56,941 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-22 19:00:56,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:56,943 INFO L225 Difference]: With dead ends: 83 [2020-12-22 19:00:56,943 INFO L226 Difference]: Without dead ends: 83 [2020-12-22 19:00:56,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:00:56,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-22 19:00:56,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2020-12-22 19:00:56,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 19:00:56,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-12-22 19:00:56,961 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 13 [2020-12-22 19:00:56,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:56,961 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-12-22 19:00:56,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:00:56,962 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-12-22 19:00:56,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 19:00:56,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:56,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:56,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 19:00:56,968 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:00:56,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:56,970 INFO L82 PathProgramCache]: Analyzing trace with hash -862198810, now seen corresponding path program 1 times [2020-12-22 19:00:56,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:56,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86462590] [2020-12-22 19:00:56,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:57,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:57,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86462590] [2020-12-22 19:00:57,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318209402] [2020-12-22 19:00:57,137 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 19:00:57,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:57,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 19:00:57,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:57,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:57,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-12-22 19:00:57,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927365453] [2020-12-22 19:00:57,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 19:00:57,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:57,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 19:00:57,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:00:57,335 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 8 states. [2020-12-22 19:00:57,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:57,650 INFO L93 Difference]: Finished difference Result 144 states and 166 transitions. [2020-12-22 19:00:57,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:00:57,651 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-12-22 19:00:57,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:57,653 INFO L225 Difference]: With dead ends: 144 [2020-12-22 19:00:57,653 INFO L226 Difference]: Without dead ends: 144 [2020-12-22 19:00:57,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-22 19:00:57,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-22 19:00:57,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 89. [2020-12-22 19:00:57,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-22 19:00:57,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 104 transitions. [2020-12-22 19:00:57,657 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 104 transitions. Word has length 17 [2020-12-22 19:00:57,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:57,658 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 104 transitions. [2020-12-22 19:00:57,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 19:00:57,658 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 104 transitions. [2020-12-22 19:00:57,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 19:00:57,659 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:57,659 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:57,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:57,874 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:00:57,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:57,875 INFO L82 PathProgramCache]: Analyzing trace with hash -862198757, now seen corresponding path program 1 times [2020-12-22 19:00:57,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:57,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617241330] [2020-12-22 19:00:57,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:57,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617241330] [2020-12-22 19:00:57,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462657835] [2020-12-22 19:00:57,942 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 19:00:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:58,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 19:00:58,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:58,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:00:58,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2020-12-22 19:00:58,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685606215] [2020-12-22 19:00:58,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:00:58,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:58,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:00:58,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:00:58,123 INFO L87 Difference]: Start difference. First operand 89 states and 104 transitions. Second operand 5 states. [2020-12-22 19:00:58,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:58,174 INFO L93 Difference]: Finished difference Result 170 states and 194 transitions. [2020-12-22 19:00:58,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:00:58,175 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-22 19:00:58,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:58,177 INFO L225 Difference]: With dead ends: 170 [2020-12-22 19:00:58,177 INFO L226 Difference]: Without dead ends: 170 [2020-12-22 19:00:58,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:00:58,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-22 19:00:58,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 113. [2020-12-22 19:00:58,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-22 19:00:58,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2020-12-22 19:00:58,182 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 17 [2020-12-22 19:00:58,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:58,182 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2020-12-22 19:00:58,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:00:58,182 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2020-12-22 19:00:58,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 19:00:58,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:58,183 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:58,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:58,397 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:00:58,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:58,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1873316007, now seen corresponding path program 1 times [2020-12-22 19:00:58,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:58,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022927386] [2020-12-22 19:00:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:58,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022927386] [2020-12-22 19:00:58,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624812149] [2020-12-22 19:00:58,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:00:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:58,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 19:00:58,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:58,663 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:58,664 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 19:00:58,666 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:58,700 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:00:58,707 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 19:00:58,707 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:00:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:58,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:58,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 19:00:58,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393317792] [2020-12-22 19:00:58,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 19:00:58,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:58,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 19:00:58,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:00:58,776 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand 7 states. [2020-12-22 19:00:58,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:58,929 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2020-12-22 19:00:58,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:00:58,930 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-12-22 19:00:58,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:58,931 INFO L225 Difference]: With dead ends: 116 [2020-12-22 19:00:58,931 INFO L226 Difference]: Without dead ends: 116 [2020-12-22 19:00:58,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 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 19:00:58,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-22 19:00:58,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2020-12-22 19:00:58,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-22 19:00:58,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2020-12-22 19:00:58,935 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 17 [2020-12-22 19:00:58,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:58,935 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2020-12-22 19:00:58,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 19:00:58,936 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2020-12-22 19:00:58,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 19:00:58,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:58,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:59,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 19:00:59,153 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:00:59,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:59,154 INFO L82 PathProgramCache]: Analyzing trace with hash -2142062488, now seen corresponding path program 1 times [2020-12-22 19:00:59,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:59,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391085284] [2020-12-22 19:00:59,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:59,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:59,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391085284] [2020-12-22 19:00:59,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:59,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 19:00:59,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996748925] [2020-12-22 19:00:59,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 19:00:59,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:59,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 19:00:59,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:00:59,270 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand 7 states. [2020-12-22 19:00:59,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:59,408 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2020-12-22 19:00:59,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:00:59,409 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-12-22 19:00:59,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:59,410 INFO L225 Difference]: With dead ends: 109 [2020-12-22 19:00:59,410 INFO L226 Difference]: Without dead ends: 109 [2020-12-22 19:00:59,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:00:59,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-22 19:00:59,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2020-12-22 19:00:59,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-22 19:00:59,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2020-12-22 19:00:59,414 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 17 [2020-12-22 19:00:59,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:59,415 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2020-12-22 19:00:59,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 19:00:59,415 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2020-12-22 19:00:59,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 19:00:59,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:59,416 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] [2020-12-22 19:00:59,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 19:00:59,416 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:00:59,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:59,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1860324492, now seen corresponding path program 1 times [2020-12-22 19:00:59,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:59,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663414705] [2020-12-22 19:00:59,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:00:59,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663414705] [2020-12-22 19:00:59,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:59,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:00:59,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392855346] [2020-12-22 19:00:59,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:00:59,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:59,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:00:59,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:59,457 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 4 states. [2020-12-22 19:00:59,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:59,554 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2020-12-22 19:00:59,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:00:59,555 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-22 19:00:59,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:59,556 INFO L225 Difference]: With dead ends: 95 [2020-12-22 19:00:59,556 INFO L226 Difference]: Without dead ends: 95 [2020-12-22 19:00:59,557 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 19:00:59,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-22 19:00:59,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-12-22 19:00:59,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-22 19:00:59,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 109 transitions. [2020-12-22 19:00:59,560 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 109 transitions. Word has length 20 [2020-12-22 19:00:59,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:59,560 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 109 transitions. [2020-12-22 19:00:59,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:00:59,560 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 109 transitions. [2020-12-22 19:00:59,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 19:00:59,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:59,561 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] [2020-12-22 19:00:59,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 19:00:59,561 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:00:59,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:59,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1860324491, now seen corresponding path program 1 times [2020-12-22 19:00:59,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:59,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400193982] [2020-12-22 19:00:59,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:00:59,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400193982] [2020-12-22 19:00:59,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:59,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 19:00:59,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716685561] [2020-12-22 19:00:59,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:00:59,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:59,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:00:59,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:00:59,650 INFO L87 Difference]: Start difference. First operand 95 states and 109 transitions. Second operand 6 states. [2020-12-22 19:00:59,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:59,764 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2020-12-22 19:00:59,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:00:59,765 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-12-22 19:00:59,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:59,766 INFO L225 Difference]: With dead ends: 94 [2020-12-22 19:00:59,766 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 19:00:59,766 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 19:00:59,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 19:00:59,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-12-22 19:00:59,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-22 19:00:59,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2020-12-22 19:00:59,771 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 20 [2020-12-22 19:00:59,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:59,772 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2020-12-22 19:00:59,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:00:59,772 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2020-12-22 19:00:59,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 19:00:59,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:59,777 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 19:00:59,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 19:00:59,777 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:00:59,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:59,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1331077295, now seen corresponding path program 1 times [2020-12-22 19:00:59,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:59,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691004012] [2020-12-22 19:00:59,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:59,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:00:59,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691004012] [2020-12-22 19:00:59,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:59,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:00:59,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741832806] [2020-12-22 19:00:59,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:00:59,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:59,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:00:59,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:00:59,828 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand 5 states. [2020-12-22 19:00:59,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:59,948 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2020-12-22 19:00:59,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:00:59,949 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-12-22 19:00:59,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:59,950 INFO L225 Difference]: With dead ends: 95 [2020-12-22 19:00:59,950 INFO L226 Difference]: Without dead ends: 95 [2020-12-22 19:00:59,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:00:59,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-22 19:00:59,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2020-12-22 19:00:59,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 19:00:59,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2020-12-22 19:00:59,954 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 23 [2020-12-22 19:00:59,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:59,954 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2020-12-22 19:00:59,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:00:59,954 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2020-12-22 19:00:59,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 19:00:59,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:59,955 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 19:00:59,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 19:00:59,955 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:00:59,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:59,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1331077296, now seen corresponding path program 1 times [2020-12-22 19:00:59,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:59,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116023784] [2020-12-22 19:00:59,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:01:00,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116023784] [2020-12-22 19:01:00,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:01:00,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 19:01:00,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418722913] [2020-12-22 19:01:00,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 19:01:00,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:00,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 19:01:00,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:01:00,153 INFO L87 Difference]: Start difference. First operand 93 states and 107 transitions. Second operand 8 states. [2020-12-22 19:01:00,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:00,624 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2020-12-22 19:01:00,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 19:01:00,625 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-12-22 19:01:00,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:00,626 INFO L225 Difference]: With dead ends: 107 [2020-12-22 19:01:00,626 INFO L226 Difference]: Without dead ends: 107 [2020-12-22 19:01:00,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:01:00,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-22 19:01:00,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2020-12-22 19:01:00,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-22 19:01:00,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2020-12-22 19:01:00,630 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 23 [2020-12-22 19:01:00,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:00,630 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2020-12-22 19:01:00,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 19:01:00,631 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2020-12-22 19:01:00,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 19:01:00,631 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:00,631 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 19:01:00,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 19:01:00,632 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:01:00,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:00,632 INFO L82 PathProgramCache]: Analyzing trace with hash 513428846, now seen corresponding path program 1 times [2020-12-22 19:01:00,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:00,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364402320] [2020-12-22 19:01:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:00,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:01:00,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364402320] [2020-12-22 19:01:00,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468920569] [2020-12-22 19:01:00,938 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 19:01:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:01,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 19:01:01,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:01,207 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 19:01:01,208 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:01,211 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:01,213 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:01,213 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-12-22 19:01:01,267 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2020-12-22 19:01:01,270 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:01,272 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:01,274 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 19:01:01,274 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 19:01:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:01:01,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:01,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2020-12-22 19:01:01,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539875067] [2020-12-22 19:01:01,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 19:01:01,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:01,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 19:01:01,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:01:01,284 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand 16 states. [2020-12-22 19:01:02,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:02,315 INFO L93 Difference]: Finished difference Result 120 states and 133 transitions. [2020-12-22 19:01:02,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 19:01:02,316 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2020-12-22 19:01:02,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:02,317 INFO L225 Difference]: With dead ends: 120 [2020-12-22 19:01:02,317 INFO L226 Difference]: Without dead ends: 120 [2020-12-22 19:01:02,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2020-12-22 19:01:02,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-22 19:01:02,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 103. [2020-12-22 19:01:02,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-22 19:01:02,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2020-12-22 19:01:02,322 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 23 [2020-12-22 19:01:02,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:02,322 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2020-12-22 19:01:02,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 19:01:02,323 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2020-12-22 19:01:02,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 19:01:02,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:02,323 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, 1, 1] [2020-12-22 19:01:02,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:02,537 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:01:02,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:02,538 INFO L82 PathProgramCache]: Analyzing trace with hash -731742098, now seen corresponding path program 1 times [2020-12-22 19:01:02,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:02,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729587714] [2020-12-22 19:01:02,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:01:02,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729587714] [2020-12-22 19:01:02,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:01:02,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:01:02,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957195621] [2020-12-22 19:01:02,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:01:02,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:02,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:01:02,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:01:02,609 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand 4 states. [2020-12-22 19:01:02,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:02,676 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2020-12-22 19:01:02,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:01:02,677 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-12-22 19:01:02,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:02,678 INFO L225 Difference]: With dead ends: 102 [2020-12-22 19:01:02,678 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 19:01:02,679 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 19:01:02,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 19:01:02,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-22 19:01:02,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 19:01:02,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-12-22 19:01:02,682 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 25 [2020-12-22 19:01:02,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:02,682 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-12-22 19:01:02,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:01:02,682 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-12-22 19:01:02,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 19:01:02,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:02,683 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 19:01:02,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 19:01:02,683 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:01:02,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:02,684 INFO L82 PathProgramCache]: Analyzing trace with hash 510694897, now seen corresponding path program 2 times [2020-12-22 19:01:02,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:02,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644805585] [2020-12-22 19:01:02,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:02,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:01:02,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644805585] [2020-12-22 19:01:02,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875129847] [2020-12-22 19:01:02,873 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 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 19:01:02,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 19:01:02,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:02,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 19:01:02,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:03,061 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 19:01:03,062 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:03,074 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:03,082 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 19:01:03,082 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 19:01:03,243 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:03,244 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 20 treesize of output 20 [2020-12-22 19:01:03,246 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:01:03,267 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:03,271 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 19:01:03,275 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 19:01:03,279 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 19:01:03,280 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:25 [2020-12-22 19:01:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 19:01:03,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:01:03,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2020-12-22 19:01:03,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38502581] [2020-12-22 19:01:03,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 19:01:03,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:03,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 19:01:03,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-12-22 19:01:03,416 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 8 states. [2020-12-22 19:01:04,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:04,146 INFO L93 Difference]: Finished difference Result 114 states and 129 transitions. [2020-12-22 19:01:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 19:01:04,147 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-12-22 19:01:04,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:04,147 INFO L225 Difference]: With dead ends: 114 [2020-12-22 19:01:04,148 INFO L226 Difference]: Without dead ends: 114 [2020-12-22 19:01:04,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-12-22 19:01:04,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-22 19:01:04,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 75. [2020-12-22 19:01:04,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 19:01:04,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2020-12-22 19:01:04,151 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 27 [2020-12-22 19:01:04,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:04,152 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2020-12-22 19:01:04,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 19:01:04,152 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2020-12-22 19:01:04,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 19:01:04,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:04,152 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, 1, 1, 1] [2020-12-22 19:01:04,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 19:01:04,368 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:01:04,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:04,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1337529045, now seen corresponding path program 1 times [2020-12-22 19:01:04,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:04,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741263258] [2020-12-22 19:01:04,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:04,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:01:04,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741263258] [2020-12-22 19:01:04,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207077490] [2020-12-22 19:01:04,895 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 19:01:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:05,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 19:01:05,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:05,315 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 19:01:05,316 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:05,329 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:05,331 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 19:01:05,331 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2020-12-22 19:01:05,546 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:01:05,549 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:05,550 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 15 treesize of output 10 [2020-12-22 19:01:05,551 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:05,560 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:05,562 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 19:01:05,563 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:3 [2020-12-22 19:01:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:01:05,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:05,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2020-12-22 19:01:05,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198149132] [2020-12-22 19:01:05,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 19:01:05,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:05,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 19:01:05,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2020-12-22 19:01:05,571 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand 24 states. [2020-12-22 19:01:07,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:07,213 INFO L93 Difference]: Finished difference Result 237 states and 265 transitions. [2020-12-22 19:01:07,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 19:01:07,214 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 30 [2020-12-22 19:01:07,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:07,215 INFO L225 Difference]: With dead ends: 237 [2020-12-22 19:01:07,215 INFO L226 Difference]: Without dead ends: 237 [2020-12-22 19:01:07,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=272, Invalid=1134, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 19:01:07,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-12-22 19:01:07,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 87. [2020-12-22 19:01:07,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 19:01:07,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2020-12-22 19:01:07,220 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 30 [2020-12-22 19:01:07,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:07,220 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2020-12-22 19:01:07,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 19:01:07,220 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2020-12-22 19:01:07,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 19:01:07,221 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:07,221 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, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:07,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:07,436 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:01:07,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:07,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1863084157, now seen corresponding path program 1 times [2020-12-22 19:01:07,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:07,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882842841] [2020-12-22 19:01:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:07,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882842841] [2020-12-22 19:01:07,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:01:07,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:01:07,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037656160] [2020-12-22 19:01:07,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:01:07,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:07,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:01:07,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:01:07,494 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand 5 states. [2020-12-22 19:01:07,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:07,606 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2020-12-22 19:01:07,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:01:07,607 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-12-22 19:01:07,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:07,608 INFO L225 Difference]: With dead ends: 86 [2020-12-22 19:01:07,608 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 19:01:07,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:01:07,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 19:01:07,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-12-22 19:01:07,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-22 19:01:07,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2020-12-22 19:01:07,612 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 33 [2020-12-22 19:01:07,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:07,612 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2020-12-22 19:01:07,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:01:07,612 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2020-12-22 19:01:07,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 19:01:07,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:07,613 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, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:07,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 19:01:07,613 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:01:07,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:07,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1863084158, now seen corresponding path program 1 times [2020-12-22 19:01:07,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:07,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439300375] [2020-12-22 19:01:07,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:07,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:07,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439300375] [2020-12-22 19:01:07,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43253593] [2020-12-22 19:01:07,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:01:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:07,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 19:01:07,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:07,885 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_30|], 1=[|v_#valid_37|]} [2020-12-22 19:01:07,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:07,893 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 19:01:07,894 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:07,911 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:07,936 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 19:01:07,942 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:07,958 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:07,961 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:07,961 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:24, output treesize:9 [2020-12-22 19:01:08,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 19:01:08,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:01:08,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2020-12-22 19:01:08,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53611096] [2020-12-22 19:01:08,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:01:08,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:08,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:01:08,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:01:08,038 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand 6 states. [2020-12-22 19:01:08,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:08,217 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2020-12-22 19:01:08,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:01:08,218 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-12-22 19:01:08,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:08,219 INFO L225 Difference]: With dead ends: 91 [2020-12-22 19:01:08,219 INFO L226 Difference]: Without dead ends: 91 [2020-12-22 19:01:08,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-12-22 19:01:08,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-22 19:01:08,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2020-12-22 19:01:08,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-22 19:01:08,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2020-12-22 19:01:08,223 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 33 [2020-12-22 19:01:08,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:08,224 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2020-12-22 19:01:08,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:01:08,224 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2020-12-22 19:01:08,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 19:01:08,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:08,224 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 19:01:08,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:08,439 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:01:08,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:08,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1878769906, now seen corresponding path program 2 times [2020-12-22 19:01:08,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:08,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45188692] [2020-12-22 19:01:08,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:01:08,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45188692] [2020-12-22 19:01:08,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437032328] [2020-12-22 19:01:08,652 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 19:01:08,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:01:08,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:08,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 19:01:08,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:09,047 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:01:09,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:09,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2020-12-22 19:01:09,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43529516] [2020-12-22 19:01:09,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 19:01:09,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:09,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 19:01:09,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-12-22 19:01:09,049 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 18 states. [2020-12-22 19:01:09,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:09,826 INFO L93 Difference]: Finished difference Result 211 states and 238 transitions. [2020-12-22 19:01:09,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:01:09,827 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-12-22 19:01:09,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:09,828 INFO L225 Difference]: With dead ends: 211 [2020-12-22 19:01:09,828 INFO L226 Difference]: Without dead ends: 211 [2020-12-22 19:01:09,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:01:09,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-12-22 19:01:09,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 92. [2020-12-22 19:01:09,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-22 19:01:09,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2020-12-22 19:01:09,832 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 34 [2020-12-22 19:01:09,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:09,833 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2020-12-22 19:01:09,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 19:01:09,833 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2020-12-22 19:01:09,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 19:01:09,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:09,833 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 19:01:10,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:10,048 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:01:10,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:10,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1579516876, now seen corresponding path program 3 times [2020-12-22 19:01:10,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:10,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405801277] [2020-12-22 19:01:10,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 19:01:10,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405801277] [2020-12-22 19:01:10,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648496825] [2020-12-22 19:01:10,379 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 19:01:10,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 19:01:10,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:10,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 19:01:10,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:10,555 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:10,556 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 19:01:10,562 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:10,594 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-22 19:01:10,597 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 19:01:10,597 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-22 19:01:10,675 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 19:01:10,676 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:10,684 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:10,685 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:10,685 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-12-22 19:01:10,913 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:10,914 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 19 treesize of output 19 [2020-12-22 19:01:10,921 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:01:10,938 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:10,939 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:10,939 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:23 [2020-12-22 19:01:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 19:01:11,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:11,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 23 [2020-12-22 19:01:11,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376959679] [2020-12-22 19:01:11,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 19:01:11,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:11,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 19:01:11,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:01:11,124 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand 23 states. [2020-12-22 19:01:13,097 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-12-22 19:01:13,503 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2020-12-22 19:01:13,721 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2020-12-22 19:01:13,911 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-12-22 19:01:14,167 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 19:01:14,393 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 19:01:15,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:15,083 INFO L93 Difference]: Finished difference Result 264 states and 298 transitions. [2020-12-22 19:01:15,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 19:01:15,084 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 37 [2020-12-22 19:01:15,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:15,086 INFO L225 Difference]: With dead ends: 264 [2020-12-22 19:01:15,086 INFO L226 Difference]: Without dead ends: 264 [2020-12-22 19:01:15,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=334, Invalid=1646, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 19:01:15,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-12-22 19:01:15,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 100. [2020-12-22 19:01:15,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-22 19:01:15,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 112 transitions. [2020-12-22 19:01:15,091 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 112 transitions. Word has length 37 [2020-12-22 19:01:15,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:15,092 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 112 transitions. [2020-12-22 19:01:15,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 19:01:15,092 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 112 transitions. [2020-12-22 19:01:15,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 19:01:15,092 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:15,093 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:15,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 19:01:15,306 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:01:15,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:15,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1768471691, now seen corresponding path program 1 times [2020-12-22 19:01:15,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:15,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362917969] [2020-12-22 19:01:15,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 19:01:15,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362917969] [2020-12-22 19:01:15,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:01:15,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 19:01:15,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183591598] [2020-12-22 19:01:15,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 19:01:15,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:15,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 19:01:15,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:01:15,506 INFO L87 Difference]: Start difference. First operand 100 states and 112 transitions. Second operand 9 states. [2020-12-22 19:01:15,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:15,838 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2020-12-22 19:01:15,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 19:01:15,839 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-12-22 19:01:15,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:15,841 INFO L225 Difference]: With dead ends: 151 [2020-12-22 19:01:15,841 INFO L226 Difference]: Without dead ends: 93 [2020-12-22 19:01:15,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-12-22 19:01:15,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-22 19:01:15,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-12-22 19:01:15,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 19:01:15,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2020-12-22 19:01:15,844 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 38 [2020-12-22 19:01:15,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:15,844 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2020-12-22 19:01:15,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 19:01:15,844 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2020-12-22 19:01:15,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 19:01:15,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:15,845 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:15,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 19:01:15,845 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:01:15,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:15,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1374104905, now seen corresponding path program 1 times [2020-12-22 19:01:15,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:15,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411643116] [2020-12-22 19:01:15,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:16,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411643116] [2020-12-22 19:01:16,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729696343] [2020-12-22 19:01:16,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:01:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:16,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 19:01:16,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:16,364 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 19:01:16,366 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:16,375 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:16,376 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:16,376 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-22 19:01:16,533 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2020-12-22 19:01:16,534 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:16,547 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:16,548 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 19:01:16,549 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 19:01:16,618 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-12-22 19:01:16,620 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:16,636 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:16,641 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:16,641 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-12-22 19:01:16,914 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:16,915 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2020-12-22 19:01:16,917 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:01:16,948 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-22 19:01:16,955 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:16,956 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2020-12-22 19:01:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:16,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:16,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2020-12-22 19:01:16,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250316983] [2020-12-22 19:01:16,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 19:01:16,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:16,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 19:01:16,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-12-22 19:01:16,971 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand 18 states. [2020-12-22 19:01:17,893 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-12-22 19:01:18,023 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-12-22 19:01:18,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:18,120 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2020-12-22 19:01:18,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 19:01:18,121 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-12-22 19:01:18,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:18,122 INFO L225 Difference]: With dead ends: 151 [2020-12-22 19:01:18,122 INFO L226 Difference]: Without dead ends: 100 [2020-12-22 19:01:18,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2020-12-22 19:01:18,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-22 19:01:18,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-12-22 19:01:18,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-22 19:01:18,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2020-12-22 19:01:18,125 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 38 [2020-12-22 19:01:18,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:18,126 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2020-12-22 19:01:18,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 19:01:18,126 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2020-12-22 19:01:18,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 19:01:18,126 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:18,126 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:18,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 19:01:18,334 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:01:18,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:18,335 INFO L82 PathProgramCache]: Analyzing trace with hash 514562726, now seen corresponding path program 2 times [2020-12-22 19:01:18,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:18,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406816474] [2020-12-22 19:01:18,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:18,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406816474] [2020-12-22 19:01:18,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840326883] [2020-12-22 19:01:18,511 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 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 19:01:18,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:01:18,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:18,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 19:01:18,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:18,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:18,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-12-22 19:01:18,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688385815] [2020-12-22 19:01:18,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 19:01:18,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:18,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 19:01:18,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-12-22 19:01:18,896 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand 15 states. [2020-12-22 19:01:19,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:19,534 INFO L93 Difference]: Finished difference Result 133 states and 149 transitions. [2020-12-22 19:01:19,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 19:01:19,535 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-12-22 19:01:19,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:19,536 INFO L225 Difference]: With dead ends: 133 [2020-12-22 19:01:19,536 INFO L226 Difference]: Without dead ends: 133 [2020-12-22 19:01:19,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-12-22 19:01:19,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-22 19:01:19,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 120. [2020-12-22 19:01:19,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-22 19:01:19,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 146 transitions. [2020-12-22 19:01:19,540 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 146 transitions. Word has length 42 [2020-12-22 19:01:19,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:19,540 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 146 transitions. [2020-12-22 19:01:19,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 19:01:19,540 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 146 transitions. [2020-12-22 19:01:19,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 19:01:19,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:19,541 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:19,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 19:01:19,757 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:01:19,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:19,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1228465231, now seen corresponding path program 1 times [2020-12-22 19:01:19,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:19,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562601273] [2020-12-22 19:01:19,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:19,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:19,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 19:01:19,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562601273] [2020-12-22 19:01:19,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:01:19,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:01:19,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638824661] [2020-12-22 19:01:19,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:01:19,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:19,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:01:19,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:01:19,814 INFO L87 Difference]: Start difference. First operand 120 states and 146 transitions. Second operand 5 states. [2020-12-22 19:01:19,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:19,934 INFO L93 Difference]: Finished difference Result 127 states and 152 transitions. [2020-12-22 19:01:19,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:01:19,935 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 19:01:19,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:19,936 INFO L225 Difference]: With dead ends: 127 [2020-12-22 19:01:19,936 INFO L226 Difference]: Without dead ends: 127 [2020-12-22 19:01:19,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:01:19,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-22 19:01:19,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 118. [2020-12-22 19:01:19,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-22 19:01:19,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 142 transitions. [2020-12-22 19:01:19,948 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 142 transitions. Word has length 43 [2020-12-22 19:01:19,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:19,948 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 142 transitions. [2020-12-22 19:01:19,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:01:19,948 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 142 transitions. [2020-12-22 19:01:19,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 19:01:19,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:19,949 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:19,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 19:01:19,949 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:01:19,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:19,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1228465230, now seen corresponding path program 1 times [2020-12-22 19:01:19,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:19,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891062816] [2020-12-22 19:01:19,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:20,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891062816] [2020-12-22 19:01:20,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274663643] [2020-12-22 19:01:20,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:20,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:20,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 19:01:20,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:20,265 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_32|], 1=[|v_#valid_39|]} [2020-12-22 19:01:20,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:20,273 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 19:01:20,274 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:20,296 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:20,307 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 19:01:20,309 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:20,331 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:20,334 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 19:01:20,334 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 19:01:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:20,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:20,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 19:01:20,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109102911] [2020-12-22 19:01:20,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 19:01:20,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:20,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 19:01:20,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:01:20,640 INFO L87 Difference]: Start difference. First operand 118 states and 142 transitions. Second operand 16 states. [2020-12-22 19:01:21,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:21,521 INFO L93 Difference]: Finished difference Result 150 states and 168 transitions. [2020-12-22 19:01:21,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 19:01:21,522 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-12-22 19:01:21,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:21,523 INFO L225 Difference]: With dead ends: 150 [2020-12-22 19:01:21,523 INFO L226 Difference]: Without dead ends: 150 [2020-12-22 19:01:21,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2020-12-22 19:01:21,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-22 19:01:21,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 123. [2020-12-22 19:01:21,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-22 19:01:21,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 150 transitions. [2020-12-22 19:01:21,527 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 150 transitions. Word has length 43 [2020-12-22 19:01:21,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:21,528 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 150 transitions. [2020-12-22 19:01:21,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 19:01:21,528 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 150 transitions. [2020-12-22 19:01:21,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 19:01:21,528 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:21,529 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:21,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:21,743 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:01:21,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:21,744 INFO L82 PathProgramCache]: Analyzing trace with hash 560922322, now seen corresponding path program 1 times [2020-12-22 19:01:21,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:21,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358334772] [2020-12-22 19:01:21,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 19:01:21,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358334772] [2020-12-22 19:01:21,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:01:21,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 19:01:21,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113303994] [2020-12-22 19:01:21,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:01:21,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:21,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:01:21,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:01:21,805 INFO L87 Difference]: Start difference. First operand 123 states and 150 transitions. Second operand 6 states. [2020-12-22 19:01:21,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:21,946 INFO L93 Difference]: Finished difference Result 133 states and 159 transitions. [2020-12-22 19:01:21,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:01:21,947 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-12-22 19:01:21,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:21,948 INFO L225 Difference]: With dead ends: 133 [2020-12-22 19:01:21,948 INFO L226 Difference]: Without dead ends: 133 [2020-12-22 19:01:21,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:01:21,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-22 19:01:21,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 122. [2020-12-22 19:01:21,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-22 19:01:21,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 147 transitions. [2020-12-22 19:01:21,953 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 147 transitions. Word has length 45 [2020-12-22 19:01:21,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:21,953 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 147 transitions. [2020-12-22 19:01:21,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:01:21,954 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 147 transitions. [2020-12-22 19:01:21,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 19:01:21,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:21,954 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:21,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 19:01:21,955 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:01:21,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:21,955 INFO L82 PathProgramCache]: Analyzing trace with hash 560922323, now seen corresponding path program 1 times [2020-12-22 19:01:21,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:21,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717335237] [2020-12-22 19:01:21,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:22,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717335237] [2020-12-22 19:01:22,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995150044] [2020-12-22 19:01:22,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:01:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:22,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 19:01:22,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:22,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:22,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:22,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2020-12-22 19:01:22,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068150248] [2020-12-22 19:01:22,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 19:01:22,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:22,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 19:01:22,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-12-22 19:01:22,505 INFO L87 Difference]: Start difference. First operand 122 states and 147 transitions. Second operand 15 states. [2020-12-22 19:01:23,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:23,057 INFO L93 Difference]: Finished difference Result 142 states and 168 transitions. [2020-12-22 19:01:23,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 19:01:23,058 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-12-22 19:01:23,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:23,059 INFO L225 Difference]: With dead ends: 142 [2020-12-22 19:01:23,059 INFO L226 Difference]: Without dead ends: 142 [2020-12-22 19:01:23,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2020-12-22 19:01:23,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-22 19:01:23,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 125. [2020-12-22 19:01:23,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-22 19:01:23,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 150 transitions. [2020-12-22 19:01:23,064 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 150 transitions. Word has length 45 [2020-12-22 19:01:23,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:23,064 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 150 transitions. [2020-12-22 19:01:23,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 19:01:23,065 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 150 transitions. [2020-12-22 19:01:23,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 19:01:23,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:23,065 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:23,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:23,280 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:01:23,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:23,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2119524429, now seen corresponding path program 1 times [2020-12-22 19:01:23,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:23,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969509959] [2020-12-22 19:01:23,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 19:01:23,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969509959] [2020-12-22 19:01:23,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:01:23,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 19:01:23,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956955099] [2020-12-22 19:01:23,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:01:23,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:23,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:01:23,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:01:23,348 INFO L87 Difference]: Start difference. First operand 125 states and 150 transitions. Second operand 6 states. [2020-12-22 19:01:23,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:23,517 INFO L93 Difference]: Finished difference Result 133 states and 158 transitions. [2020-12-22 19:01:23,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:01:23,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-12-22 19:01:23,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:23,519 INFO L225 Difference]: With dead ends: 133 [2020-12-22 19:01:23,519 INFO L226 Difference]: Without dead ends: 133 [2020-12-22 19:01:23,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:01:23,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-22 19:01:23,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 124. [2020-12-22 19:01:23,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-22 19:01:23,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2020-12-22 19:01:23,523 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 47 [2020-12-22 19:01:23,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:23,525 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2020-12-22 19:01:23,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:01:23,525 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2020-12-22 19:01:23,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 19:01:23,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:23,526 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:23,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 19:01:23,527 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:01:23,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:23,527 INFO L82 PathProgramCache]: Analyzing trace with hash -2119524428, now seen corresponding path program 1 times [2020-12-22 19:01:23,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:23,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928494600] [2020-12-22 19:01:23,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:23,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928494600] [2020-12-22 19:01:23,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660762895] [2020-12-22 19:01:23,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:01:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:23,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 19:01:23,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:24,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:24,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:24,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-12-22 19:01:24,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391380231] [2020-12-22 19:01:24,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 19:01:24,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:24,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 19:01:24,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-12-22 19:01:24,091 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand 15 states. [2020-12-22 19:01:24,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:24,858 INFO L93 Difference]: Finished difference Result 150 states and 170 transitions. [2020-12-22 19:01:24,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:01:24,859 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-12-22 19:01:24,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:24,860 INFO L225 Difference]: With dead ends: 150 [2020-12-22 19:01:24,860 INFO L226 Difference]: Without dead ends: 150 [2020-12-22 19:01:24,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2020-12-22 19:01:24,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-22 19:01:24,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 125. [2020-12-22 19:01:24,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-22 19:01:24,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 149 transitions. [2020-12-22 19:01:24,864 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 149 transitions. Word has length 47 [2020-12-22 19:01:24,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:24,864 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 149 transitions. [2020-12-22 19:01:24,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 19:01:24,865 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 149 transitions. [2020-12-22 19:01:24,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 19:01:24,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:24,865 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 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, 1, 1, 1, 1] [2020-12-22 19:01:25,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:25,080 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:01:25,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:25,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1002087267, now seen corresponding path program 3 times [2020-12-22 19:01:25,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:25,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883244565] [2020-12-22 19:01:25,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:25,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883244565] [2020-12-22 19:01:25,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168903707] [2020-12-22 19:01:25,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:25,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 19:01:25,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:25,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-22 19:01:25,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:25,899 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:25,899 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 19:01:25,901 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:25,952 INFO L625 ElimStorePlain]: treesize reduction 10, result has 70.6 percent of original size [2020-12-22 19:01:25,954 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:25,955 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:15 [2020-12-22 19:01:26,545 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 19:01:26,546 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:26,573 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:26,575 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 19:01:26,575 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:31 [2020-12-22 19:01:26,701 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:26,702 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 69 [2020-12-22 19:01:26,704 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:26,772 INFO L625 ElimStorePlain]: treesize reduction 39, result has 50.6 percent of original size [2020-12-22 19:01:26,774 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 19:01:26,774 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:40 [2020-12-22 19:01:27,048 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 22 treesize of output 16 [2020-12-22 19:01:27,050 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 19:01:27,072 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:27,074 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:27,074 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:35 [2020-12-22 19:01:27,360 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2020-12-22 19:01:27,361 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:27,364 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:27,364 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:27,365 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2020-12-22 19:01:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:27,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:27,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 29 [2020-12-22 19:01:27,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704785143] [2020-12-22 19:01:27,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 19:01:27,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:27,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 19:01:27,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=740, Unknown=0, NotChecked=0, Total=812 [2020-12-22 19:01:27,389 INFO L87 Difference]: Start difference. First operand 125 states and 149 transitions. Second operand 29 states. [2020-12-22 19:01:29,043 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-12-22 19:01:29,304 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-12-22 19:01:29,811 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-12-22 19:01:30,014 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-12-22 19:01:30,344 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-12-22 19:01:30,593 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-12-22 19:01:30,785 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 19:01:31,031 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-12-22 19:01:31,262 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-12-22 19:01:31,517 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-12-22 19:01:31,671 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 19:01:32,007 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-12-22 19:01:32,227 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-12-22 19:01:32,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:32,508 INFO L93 Difference]: Finished difference Result 262 states and 302 transitions. [2020-12-22 19:01:32,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 19:01:32,509 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 47 [2020-12-22 19:01:32,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:32,511 INFO L225 Difference]: With dead ends: 262 [2020-12-22 19:01:32,511 INFO L226 Difference]: Without dead ends: 244 [2020-12-22 19:01:32,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=463, Invalid=2399, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 19:01:32,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-12-22 19:01:32,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 200. [2020-12-22 19:01:32,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-12-22 19:01:32,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 237 transitions. [2020-12-22 19:01:32,518 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 237 transitions. Word has length 47 [2020-12-22 19:01:32,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:32,518 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 237 transitions. [2020-12-22 19:01:32,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 19:01:32,518 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 237 transitions. [2020-12-22 19:01:32,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 19:01:32,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:32,519 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:32,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 19:01:32,734 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:01:32,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:32,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1048782252, now seen corresponding path program 1 times [2020-12-22 19:01:32,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:32,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401455871] [2020-12-22 19:01:32,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 19:01:32,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401455871] [2020-12-22 19:01:32,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:01:32,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 19:01:32,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788875839] [2020-12-22 19:01:32,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:01:32,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:32,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:01:32,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:01:32,811 INFO L87 Difference]: Start difference. First operand 200 states and 237 transitions. Second operand 6 states. [2020-12-22 19:01:32,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:32,945 INFO L93 Difference]: Finished difference Result 212 states and 248 transitions. [2020-12-22 19:01:32,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:01:32,946 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-12-22 19:01:32,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:32,951 INFO L225 Difference]: With dead ends: 212 [2020-12-22 19:01:32,951 INFO L226 Difference]: Without dead ends: 212 [2020-12-22 19:01:32,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:01:32,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-12-22 19:01:32,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 199. [2020-12-22 19:01:32,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-22 19:01:32,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 234 transitions. [2020-12-22 19:01:32,960 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 234 transitions. Word has length 49 [2020-12-22 19:01:32,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:32,961 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 234 transitions. [2020-12-22 19:01:32,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:01:32,961 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 234 transitions. [2020-12-22 19:01:32,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 19:01:32,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:32,962 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:32,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-12-22 19:01:32,963 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:01:32,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:32,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1048782251, now seen corresponding path program 1 times [2020-12-22 19:01:32,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:32,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515860527] [2020-12-22 19:01:32,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:33,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:33,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515860527] [2020-12-22 19:01:33,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794697869] [2020-12-22 19:01:33,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:01:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:33,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 19:01:33,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:33,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:33,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:33,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2020-12-22 19:01:33,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886272638] [2020-12-22 19:01:33,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 19:01:33,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:33,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 19:01:33,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:01:33,570 INFO L87 Difference]: Start difference. First operand 199 states and 234 transitions. Second operand 16 states. [2020-12-22 19:01:34,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:34,317 INFO L93 Difference]: Finished difference Result 261 states and 303 transitions. [2020-12-22 19:01:34,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:01:34,318 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-12-22 19:01:34,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:34,320 INFO L225 Difference]: With dead ends: 261 [2020-12-22 19:01:34,320 INFO L226 Difference]: Without dead ends: 258 [2020-12-22 19:01:34,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2020-12-22 19:01:34,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-12-22 19:01:34,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 204. [2020-12-22 19:01:34,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-12-22 19:01:34,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 240 transitions. [2020-12-22 19:01:34,326 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 240 transitions. Word has length 49 [2020-12-22 19:01:34,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:34,326 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 240 transitions. [2020-12-22 19:01:34,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 19:01:34,326 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 240 transitions. [2020-12-22 19:01:34,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 19:01:34,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:34,327 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:34,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 19:01:34,541 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:01:34,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:34,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1733532468, now seen corresponding path program 1 times [2020-12-22 19:01:34,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:34,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348406391] [2020-12-22 19:01:34,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 19:01:34,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348406391] [2020-12-22 19:01:34,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:01:34,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 19:01:34,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466234599] [2020-12-22 19:01:34,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:01:34,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:34,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:01:34,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:01:34,661 INFO L87 Difference]: Start difference. First operand 204 states and 240 transitions. Second operand 6 states. [2020-12-22 19:01:34,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:34,766 INFO L93 Difference]: Finished difference Result 259 states and 299 transitions. [2020-12-22 19:01:34,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 19:01:34,767 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-12-22 19:01:34,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:34,769 INFO L225 Difference]: With dead ends: 259 [2020-12-22 19:01:34,769 INFO L226 Difference]: Without dead ends: 241 [2020-12-22 19:01:34,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:01:34,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-12-22 19:01:34,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 229. [2020-12-22 19:01:34,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-12-22 19:01:34,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 267 transitions. [2020-12-22 19:01:34,775 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 267 transitions. Word has length 51 [2020-12-22 19:01:34,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:34,775 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 267 transitions. [2020-12-22 19:01:34,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:01:34,775 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 267 transitions. [2020-12-22 19:01:34,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 19:01:34,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:34,776 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:34,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-12-22 19:01:34,776 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:01:34,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:34,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1890652506, now seen corresponding path program 4 times [2020-12-22 19:01:34,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:34,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710991857] [2020-12-22 19:01:34,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:34,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710991857] [2020-12-22 19:01:34,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003767283] [2020-12-22 19:01:34,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:35,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:01:35,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:35,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 19:01:35,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:35,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:35,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-12-22 19:01:35,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433671326] [2020-12-22 19:01:35,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 19:01:35,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:35,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 19:01:35,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:01:35,373 INFO L87 Difference]: Start difference. First operand 229 states and 267 transitions. Second operand 17 states. [2020-12-22 19:01:36,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:36,203 INFO L93 Difference]: Finished difference Result 289 states and 326 transitions. [2020-12-22 19:01:36,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 19:01:36,204 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2020-12-22 19:01:36,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:36,206 INFO L225 Difference]: With dead ends: 289 [2020-12-22 19:01:36,206 INFO L226 Difference]: Without dead ends: 289 [2020-12-22 19:01:36,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:01:36,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-12-22 19:01:36,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 269. [2020-12-22 19:01:36,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-12-22 19:01:36,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 321 transitions. [2020-12-22 19:01:36,213 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 321 transitions. Word has length 51 [2020-12-22 19:01:36,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:36,213 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 321 transitions. [2020-12-22 19:01:36,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 19:01:36,214 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 321 transitions. [2020-12-22 19:01:36,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 19:01:36,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:36,215 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:36,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 19:01:36,429 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:01:36,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:36,430 INFO L82 PathProgramCache]: Analyzing trace with hash 269209443, now seen corresponding path program 5 times [2020-12-22 19:01:36,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:36,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244299044] [2020-12-22 19:01:36,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:37,689 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:37,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244299044] [2020-12-22 19:01:37,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499145127] [2020-12-22 19:01:37,690 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 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 19:01:37,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 19:01:37,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:37,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-22 19:01:37,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:37,996 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 5 treesize of output 3 [2020-12-22 19:01:37,997 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:38,009 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:38,009 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:38,010 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:10 [2020-12-22 19:01:38,322 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 19:01:38,324 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:38,342 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:38,344 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 19:01:38,344 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:23 [2020-12-22 19:01:38,468 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:38,469 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 63 [2020-12-22 19:01:38,475 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:38,529 INFO L625 ElimStorePlain]: treesize reduction 35, result has 48.5 percent of original size [2020-12-22 19:01:38,531 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:38,531 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:33 [2020-12-22 19:01:39,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:01:39,725 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:01:39,816 INFO L348 Elim1Store]: treesize reduction 14, result has 78.8 percent of original size [2020-12-22 19:01:39,816 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 38 treesize of output 65 [2020-12-22 19:01:39,821 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:39,834 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:39,837 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 19:01:39,837 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:3 [2020-12-22 19:01:39,867 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:01:39,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:39,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 39 [2020-12-22 19:01:39,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747056705] [2020-12-22 19:01:39,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 19:01:39,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:39,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 19:01:39,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 19:01:39,870 INFO L87 Difference]: Start difference. First operand 269 states and 321 transitions. Second operand 39 states. [2020-12-22 19:01:41,269 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 23 [2020-12-22 19:01:42,036 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-12-22 19:01:42,300 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-12-22 19:01:42,698 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-12-22 19:01:42,981 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-12-22 19:01:43,357 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-12-22 19:01:43,529 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2020-12-22 19:01:43,796 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-12-22 19:01:44,045 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 19:01:44,318 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-12-22 19:01:44,568 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-12-22 19:01:44,867 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-12-22 19:01:45,129 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2020-12-22 19:01:45,404 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-12-22 19:01:45,661 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-12-22 19:01:45,965 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-12-22 19:01:46,205 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-22 19:01:46,454 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-12-22 19:01:46,737 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-12-22 19:01:47,055 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2020-12-22 19:01:47,309 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-12-22 19:01:47,589 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-12-22 19:01:47,831 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-22 19:01:48,027 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-12-22 19:01:48,283 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-12-22 19:01:48,528 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-12-22 19:01:48,787 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-12-22 19:01:48,993 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-12-22 19:01:49,229 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-22 19:01:49,447 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-12-22 19:01:49,684 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 19:01:49,872 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-12-22 19:01:50,123 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-12-22 19:01:50,351 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-12-22 19:01:50,617 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-12-22 19:01:50,850 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-12-22 19:01:51,091 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-12-22 19:01:51,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:51,231 INFO L93 Difference]: Finished difference Result 528 states and 604 transitions. [2020-12-22 19:01:51,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 19:01:51,233 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 56 [2020-12-22 19:01:51,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:51,235 INFO L225 Difference]: With dead ends: 528 [2020-12-22 19:01:51,235 INFO L226 Difference]: Without dead ends: 416 [2020-12-22 19:01:51,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=1107, Invalid=6725, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 19:01:51,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-12-22 19:01:51,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 359. [2020-12-22 19:01:51,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2020-12-22 19:01:51,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 428 transitions. [2020-12-22 19:01:51,245 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 428 transitions. Word has length 56 [2020-12-22 19:01:51,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:51,245 INFO L481 AbstractCegarLoop]: Abstraction has 359 states and 428 transitions. [2020-12-22 19:01:51,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 19:01:51,245 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 428 transitions. [2020-12-22 19:01:51,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 19:01:51,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:51,246 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:51,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 19:01:51,447 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:01:51,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:51,448 INFO L82 PathProgramCache]: Analyzing trace with hash 2081403787, now seen corresponding path program 1 times [2020-12-22 19:01:51,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:51,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583499519] [2020-12-22 19:01:51,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:51,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 19:01:51,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583499519] [2020-12-22 19:01:51,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265306937] [2020-12-22 19:01:51,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:01:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:51,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 19:01:51,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:51,838 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 19:01:51,841 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:51,848 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:51,849 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:51,850 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-22 19:01:52,056 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2020-12-22 19:01:52,058 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:52,072 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:52,074 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 19:01:52,074 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 19:01:52,134 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-12-22 19:01:52,136 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:52,154 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:52,156 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:52,156 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-12-22 19:01:52,639 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:52,639 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2020-12-22 19:01:52,642 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:01:52,669 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-22 19:01:52,672 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:52,673 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2020-12-22 19:01:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 19:01:52,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:52,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 20 [2020-12-22 19:01:52,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804044990] [2020-12-22 19:01:52,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 19:01:52,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:52,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 19:01:52,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-12-22 19:01:52,752 INFO L87 Difference]: Start difference. First operand 359 states and 428 transitions. Second operand 20 states. [2020-12-22 19:01:53,826 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-22 19:01:54,015 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 19:01:58,273 WARN L197 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-12-22 19:02:02,699 WARN L197 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-12-22 19:02:06,879 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-22 19:02:11,224 WARN L197 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-12-22 19:02:15,496 WARN L197 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-12-22 19:02:19,653 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 19:02:23,873 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 19:02:28,120 WARN L197 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-22 19:02:28,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:28,209 INFO L93 Difference]: Finished difference Result 546 states and 634 transitions. [2020-12-22 19:02:28,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 19:02:28,213 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2020-12-22 19:02:28,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:28,215 INFO L225 Difference]: With dead ends: 546 [2020-12-22 19:02:28,215 INFO L226 Difference]: Without dead ends: 467 [2020-12-22 19:02:28,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=280, Invalid=1280, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 19:02:28,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-12-22 19:02:28,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 422. [2020-12-22 19:02:28,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2020-12-22 19:02:28,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 510 transitions. [2020-12-22 19:02:28,226 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 510 transitions. Word has length 58 [2020-12-22 19:02:28,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:28,226 INFO L481 AbstractCegarLoop]: Abstraction has 422 states and 510 transitions. [2020-12-22 19:02:28,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 19:02:28,226 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 510 transitions. [2020-12-22 19:02:28,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 19:02:28,227 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:28,227 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:28,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 19:02:28,443 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:02:28,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:28,443 INFO L82 PathProgramCache]: Analyzing trace with hash -2033507871, now seen corresponding path program 1 times [2020-12-22 19:02:28,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:28,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931378457] [2020-12-22 19:02:28,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:28,691 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 19:02:28,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931378457] [2020-12-22 19:02:28,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058149024] [2020-12-22 19:02:28,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:02:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:28,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 19:02:28,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:29,115 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 19:02:29,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:29,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-12-22 19:02:29,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457925692] [2020-12-22 19:02:29,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 19:02:29,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:29,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 19:02:29,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:02:29,117 INFO L87 Difference]: Start difference. First operand 422 states and 510 transitions. Second operand 17 states. [2020-12-22 19:02:30,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:30,022 INFO L93 Difference]: Finished difference Result 464 states and 540 transitions. [2020-12-22 19:02:30,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 19:02:30,023 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2020-12-22 19:02:30,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:30,026 INFO L225 Difference]: With dead ends: 464 [2020-12-22 19:02:30,026 INFO L226 Difference]: Without dead ends: 463 [2020-12-22 19:02:30,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2020-12-22 19:02:30,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2020-12-22 19:02:30,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 421. [2020-12-22 19:02:30,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-12-22 19:02:30,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 501 transitions. [2020-12-22 19:02:30,036 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 501 transitions. Word has length 59 [2020-12-22 19:02:30,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:30,037 INFO L481 AbstractCegarLoop]: Abstraction has 421 states and 501 transitions. [2020-12-22 19:02:30,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 19:02:30,037 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 501 transitions. [2020-12-22 19:02:30,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 19:02:30,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:30,038 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:30,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:30,252 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:02:30,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:30,253 INFO L82 PathProgramCache]: Analyzing trace with hash -162234496, now seen corresponding path program 6 times [2020-12-22 19:02:30,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:30,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465548019] [2020-12-22 19:02:30,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:30,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:30,531 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:02:30,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465548019] [2020-12-22 19:02:30,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891927845] [2020-12-22 19:02:30,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:30,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 19:02:30,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:30,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 19:02:30,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:02:31,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:31,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-12-22 19:02:31,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923419439] [2020-12-22 19:02:31,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 19:02:31,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:31,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 19:02:31,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-12-22 19:02:31,029 INFO L87 Difference]: Start difference. First operand 421 states and 501 transitions. Second operand 20 states. [2020-12-22 19:02:32,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:32,290 INFO L93 Difference]: Finished difference Result 511 states and 591 transitions. [2020-12-22 19:02:32,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 19:02:32,291 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2020-12-22 19:02:32,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:32,296 INFO L225 Difference]: With dead ends: 511 [2020-12-22 19:02:32,297 INFO L226 Difference]: Without dead ends: 511 [2020-12-22 19:02:32,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2020-12-22 19:02:32,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2020-12-22 19:02:32,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 484. [2020-12-22 19:02:32,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2020-12-22 19:02:32,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 584 transitions. [2020-12-22 19:02:32,307 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 584 transitions. Word has length 60 [2020-12-22 19:02:32,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:32,307 INFO L481 AbstractCegarLoop]: Abstraction has 484 states and 584 transitions. [2020-12-22 19:02:32,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 19:02:32,307 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 584 transitions. [2020-12-22 19:02:32,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 19:02:32,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:32,309 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:32,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-22 19:02:32,522 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:02:32,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:32,523 INFO L82 PathProgramCache]: Analyzing trace with hash 114423395, now seen corresponding path program 1 times [2020-12-22 19:02:32,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:32,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195498995] [2020-12-22 19:02:32,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 19:02:32,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195498995] [2020-12-22 19:02:32,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120851972] [2020-12-22 19:02:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order 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 19:02:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:32,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 19:02:32,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:33,197 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-22 19:02:33,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:33,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2020-12-22 19:02:33,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862908189] [2020-12-22 19:02:33,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 19:02:33,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:33,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 19:02:33,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:02:33,199 INFO L87 Difference]: Start difference. First operand 484 states and 584 transitions. Second operand 16 states. [2020-12-22 19:02:34,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:34,553 INFO L93 Difference]: Finished difference Result 588 states and 681 transitions. [2020-12-22 19:02:34,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 19:02:34,555 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2020-12-22 19:02:34,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:34,558 INFO L225 Difference]: With dead ends: 588 [2020-12-22 19:02:34,558 INFO L226 Difference]: Without dead ends: 539 [2020-12-22 19:02:34,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=218, Invalid=774, Unknown=0, NotChecked=0, Total=992 [2020-12-22 19:02:34,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2020-12-22 19:02:34,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 435. [2020-12-22 19:02:34,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-12-22 19:02:34,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 515 transitions. [2020-12-22 19:02:34,569 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 515 transitions. Word has length 63 [2020-12-22 19:02:34,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:34,570 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 515 transitions. [2020-12-22 19:02:34,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 19:02:34,570 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 515 transitions. [2020-12-22 19:02:34,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 19:02:34,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:34,571 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:34,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:34,787 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:02:34,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:34,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1912649417, now seen corresponding path program 7 times [2020-12-22 19:02:34,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:34,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627978167] [2020-12-22 19:02:34,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:02:35,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627978167] [2020-12-22 19:02:35,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539827964] [2020-12-22 19:02:35,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:35,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 19:02:35,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:35,561 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 19:02:35,563 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:35,573 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:35,574 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:35,574 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-22 19:02:36,033 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2020-12-22 19:02:36,034 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:36,054 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:36,057 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 19:02:36,057 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2020-12-22 19:02:36,159 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-12-22 19:02:36,161 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:36,181 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:36,183 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-22 19:02:36,184 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:38, output treesize:34 [2020-12-22 19:02:37,167 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:02:37,168 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2020-12-22 19:02:37,170 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:37,193 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:37,197 INFO L547 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:37,198 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:49, output treesize:3 [2020-12-22 19:02:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:02:37,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:37,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 33 [2020-12-22 19:02:37,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652081611] [2020-12-22 19:02:37,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 19:02:37,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:37,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 19:02:37,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 19:02:37,247 INFO L87 Difference]: Start difference. First operand 435 states and 515 transitions. Second operand 33 states. [2020-12-22 19:02:39,135 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-12-22 19:02:40,379 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-22 19:02:40,626 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-12-22 19:02:41,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:41,034 INFO L93 Difference]: Finished difference Result 720 states and 832 transitions. [2020-12-22 19:02:41,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 19:02:41,035 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2020-12-22 19:02:41,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:41,037 INFO L225 Difference]: With dead ends: 720 [2020-12-22 19:02:41,037 INFO L226 Difference]: Without dead ends: 644 [2020-12-22 19:02:41,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=281, Invalid=2169, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 19:02:41,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2020-12-22 19:02:41,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 611. [2020-12-22 19:02:41,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2020-12-22 19:02:41,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 723 transitions. [2020-12-22 19:02:41,051 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 723 transitions. Word has length 65 [2020-12-22 19:02:41,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:41,051 INFO L481 AbstractCegarLoop]: Abstraction has 611 states and 723 transitions. [2020-12-22 19:02:41,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 19:02:41,051 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 723 transitions. [2020-12-22 19:02:41,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 19:02:41,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:41,053 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:41,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-22 19:02:41,268 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:02:41,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:41,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1370877155, now seen corresponding path program 2 times [2020-12-22 19:02:41,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:41,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449442491] [2020-12-22 19:02:41,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 19:02:41,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449442491] [2020-12-22 19:02:41,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134656959] [2020-12-22 19:02:41,558 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 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 19:02:41,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:02:41,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:41,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 100 conjunts are in the unsatisfiable core [2020-12-22 19:02:41,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:41,787 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:41,787 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 19:02:41,788 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:41,836 INFO L625 ElimStorePlain]: treesize reduction 10, result has 70.6 percent of original size [2020-12-22 19:02:41,838 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:41,838 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:24 [2020-12-22 19:02:42,102 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:02:42,236 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 19:02:42,237 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:42,247 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 19:02:42,248 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:42,284 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:42,285 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-22 19:02:42,285 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:55, output treesize:47 [2020-12-22 19:02:42,693 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-12-22 19:02:42,694 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:02:43,319 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-12-22 19:02:43,319 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:02:43,322 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-12-22 19:02:43,322 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:02:43,335 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:02:43,345 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:43,346 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2020-12-22 19:02:43,348 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:43,424 INFO L625 ElimStorePlain]: treesize reduction 6, result has 88.9 percent of original size [2020-12-22 19:02:43,432 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:02:43,468 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:43,468 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 28 treesize of output 48 [2020-12-22 19:02:43,471 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:43,533 INFO L625 ElimStorePlain]: treesize reduction 18, result has 58.1 percent of original size [2020-12-22 19:02:43,535 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-22 19:02:43,536 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:78, output treesize:17 [2020-12-22 19:02:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 19:02:44,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:44,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20] total 31 [2020-12-22 19:02:44,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737360552] [2020-12-22 19:02:44,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 19:02:44,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:44,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 19:02:44,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2020-12-22 19:02:44,021 INFO L87 Difference]: Start difference. First operand 611 states and 723 transitions. Second operand 32 states. [2020-12-22 19:02:45,322 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-12-22 19:02:45,596 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-22 19:02:45,957 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-12-22 19:02:46,328 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-12-22 19:02:46,685 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-12-22 19:02:47,026 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2020-12-22 19:02:47,278 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-12-22 19:02:47,582 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-12-22 19:02:47,792 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-12-22 19:02:48,089 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-12-22 19:02:48,319 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-12-22 19:02:48,627 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-12-22 19:02:48,928 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-12-22 19:02:49,313 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-12-22 19:02:49,651 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-12-22 19:02:49,885 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-12-22 19:02:50,177 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-12-22 19:02:50,438 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-12-22 19:02:51,435 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-12-22 19:02:51,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:51,637 INFO L93 Difference]: Finished difference Result 674 states and 775 transitions. [2020-12-22 19:02:51,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 19:02:51,638 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-12-22 19:02:51,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:51,641 INFO L225 Difference]: With dead ends: 674 [2020-12-22 19:02:51,641 INFO L226 Difference]: Without dead ends: 606 [2020-12-22 19:02:51,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=467, Invalid=2395, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 19:02:51,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-12-22 19:02:51,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 525. [2020-12-22 19:02:51,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2020-12-22 19:02:51,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 625 transitions. [2020-12-22 19:02:51,653 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 625 transitions. Word has length 68 [2020-12-22 19:02:51,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:51,653 INFO L481 AbstractCegarLoop]: Abstraction has 525 states and 625 transitions. [2020-12-22 19:02:51,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 19:02:51,653 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 625 transitions. [2020-12-22 19:02:51,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 19:02:51,654 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:51,654 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:51,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:51,870 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:02:51,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:51,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1333006979, now seen corresponding path program 2 times [2020-12-22 19:02:51,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:51,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927271276] [2020-12-22 19:02:51,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-22 19:02:52,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927271276] [2020-12-22 19:02:52,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691183812] [2020-12-22 19:02:52,196 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 19:02:52,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:02:52,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:52,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-22 19:02:52,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:52,386 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_35|], 1=[|v_#valid_42|]} [2020-12-22 19:02:52,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:02:52,394 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 19:02:52,396 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:52,414 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:52,422 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 19:02:52,424 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:02:52,442 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:02:52,444 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:02:52,445 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:16 [2020-12-22 19:02:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-22 19:02:53,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:53,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-12-22 19:02:53,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168031756] [2020-12-22 19:02:53,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 19:02:53,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:53,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 19:02:53,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-12-22 19:02:53,020 INFO L87 Difference]: Start difference. First operand 525 states and 625 transitions. Second operand 21 states. [2020-12-22 19:02:54,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:54,472 INFO L93 Difference]: Finished difference Result 729 states and 860 transitions. [2020-12-22 19:02:54,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 19:02:54,474 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 69 [2020-12-22 19:02:54,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:54,477 INFO L225 Difference]: With dead ends: 729 [2020-12-22 19:02:54,477 INFO L226 Difference]: Without dead ends: 729 [2020-12-22 19:02:54,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2020-12-22 19:02:54,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2020-12-22 19:02:54,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 548. [2020-12-22 19:02:54,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 548 states. [2020-12-22 19:02:54,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 660 transitions. [2020-12-22 19:02:54,488 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 660 transitions. Word has length 69 [2020-12-22 19:02:54,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:54,489 INFO L481 AbstractCegarLoop]: Abstraction has 548 states and 660 transitions. [2020-12-22 19:02:54,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 19:02:54,489 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 660 transitions. [2020-12-22 19:02:54,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 19:02:54,490 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:54,490 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:54,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-22 19:02:54,704 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:02:54,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:54,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1188026188, now seen corresponding path program 8 times [2020-12-22 19:02:54,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:54,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950175066] [2020-12-22 19:02:54,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:54,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 65 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:02:55,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950175066] [2020-12-22 19:02:55,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184676821] [2020-12-22 19:02:55,088 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 19:02:55,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:02:55,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:02:55,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 19:02:55,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:55,713 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:02:55,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:55,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2020-12-22 19:02:55,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060249995] [2020-12-22 19:02:55,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 19:02:55,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:55,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 19:02:55,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2020-12-22 19:02:55,715 INFO L87 Difference]: Start difference. First operand 548 states and 660 transitions. Second operand 24 states. [2020-12-22 19:02:57,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:57,675 INFO L93 Difference]: Finished difference Result 673 states and 782 transitions. [2020-12-22 19:02:57,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 19:02:57,676 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2020-12-22 19:02:57,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:57,680 INFO L225 Difference]: With dead ends: 673 [2020-12-22 19:02:57,680 INFO L226 Difference]: Without dead ends: 673 [2020-12-22 19:02:57,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 19:02:57,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2020-12-22 19:02:57,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 611. [2020-12-22 19:02:57,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2020-12-22 19:02:57,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 738 transitions. [2020-12-22 19:02:57,691 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 738 transitions. Word has length 69 [2020-12-22 19:02:57,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:57,691 INFO L481 AbstractCegarLoop]: Abstraction has 611 states and 738 transitions. [2020-12-22 19:02:57,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 19:02:57,691 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 738 transitions. [2020-12-22 19:02:57,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 19:02:57,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:57,692 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:02:57,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:02:57,907 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:02:57,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:02:57,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1119450658, now seen corresponding path program 1 times [2020-12-22 19:02:57,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:02:57,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620483797] [2020-12-22 19:02:57,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:02:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 19:02:58,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620483797] [2020-12-22 19:02:58,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642416957] [2020-12-22 19:02:58,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:02:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:02:58,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 19:02:58,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:02:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 19:02:58,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:02:58,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2020-12-22 19:02:58,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110130012] [2020-12-22 19:02:58,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 19:02:58,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:02:58,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 19:02:58,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-12-22 19:02:58,759 INFO L87 Difference]: Start difference. First operand 611 states and 738 transitions. Second operand 20 states. [2020-12-22 19:02:59,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:02:59,856 INFO L93 Difference]: Finished difference Result 1121 states and 1317 transitions. [2020-12-22 19:02:59,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 19:02:59,857 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 71 [2020-12-22 19:02:59,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:02:59,861 INFO L225 Difference]: With dead ends: 1121 [2020-12-22 19:02:59,861 INFO L226 Difference]: Without dead ends: 1121 [2020-12-22 19:02:59,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2020-12-22 19:02:59,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2020-12-22 19:02:59,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 653. [2020-12-22 19:02:59,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 653 states. [2020-12-22 19:02:59,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 793 transitions. [2020-12-22 19:02:59,874 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 793 transitions. Word has length 71 [2020-12-22 19:02:59,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:02:59,875 INFO L481 AbstractCegarLoop]: Abstraction has 653 states and 793 transitions. [2020-12-22 19:02:59,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 19:02:59,875 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 793 transitions. [2020-12-22 19:02:59,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 19:02:59,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:02:59,876 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:03:00,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-22 19:03:00,091 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:03:00,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:03:00,092 INFO L82 PathProgramCache]: Analyzing trace with hash -2050255873, now seen corresponding path program 1 times [2020-12-22 19:03:00,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:03:00,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698374580] [2020-12-22 19:03:00,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:03:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-22 19:03:00,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698374580] [2020-12-22 19:03:00,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929567307] [2020-12-22 19:03:00,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:03:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:00,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 19:03:00,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:03:00,607 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_36|], 1=[|v_#valid_43|]} [2020-12-22 19:03:00,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:03:00,616 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 19:03:00,617 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:00,635 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:00,644 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 19:03:00,647 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:00,666 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:00,668 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 19:03:00,669 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-22 19:03:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-22 19:03:01,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:03:01,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-12-22 19:03:01,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068185523] [2020-12-22 19:03:01,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 19:03:01,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:03:01,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 19:03:01,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2020-12-22 19:03:01,258 INFO L87 Difference]: Start difference. First operand 653 states and 793 transitions. Second operand 22 states. [2020-12-22 19:03:02,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:03:02,898 INFO L93 Difference]: Finished difference Result 869 states and 1037 transitions. [2020-12-22 19:03:02,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 19:03:02,899 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 73 [2020-12-22 19:03:02,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:03:02,904 INFO L225 Difference]: With dead ends: 869 [2020-12-22 19:03:02,904 INFO L226 Difference]: Without dead ends: 869 [2020-12-22 19:03:02,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 19:03:02,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2020-12-22 19:03:02,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 656. [2020-12-22 19:03:02,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 656 states. [2020-12-22 19:03:02,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 796 transitions. [2020-12-22 19:03:02,915 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 796 transitions. Word has length 73 [2020-12-22 19:03:02,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:03:02,916 INFO L481 AbstractCegarLoop]: Abstraction has 656 states and 796 transitions. [2020-12-22 19:03:02,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 19:03:02,916 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 796 transitions. [2020-12-22 19:03:02,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 19:03:02,917 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:03:02,917 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:03:03,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:03:03,131 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:03:03,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:03:03,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1419954798, now seen corresponding path program 1 times [2020-12-22 19:03:03,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:03:03,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310887905] [2020-12-22 19:03:03,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:03:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-22 19:03:03,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310887905] [2020-12-22 19:03:03,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202389163] [2020-12-22 19:03:03,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:03:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:03,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 101 conjunts are in the unsatisfiable core [2020-12-22 19:03:03,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:03:03,854 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 19:03:03,856 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:03,868 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:03,869 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:03,870 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-22 19:03:04,291 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2020-12-22 19:03:04,293 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:04,311 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:04,313 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 19:03:04,314 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2020-12-22 19:03:04,400 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-12-22 19:03:04,402 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:04,425 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:04,427 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 19:03:04,428 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:34 [2020-12-22 19:03:05,908 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:03:05,918 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:05,918 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 28 [2020-12-22 19:03:05,920 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:05,950 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:05,954 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 19:03:05,955 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:14 [2020-12-22 19:03:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 19:03:06,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:03:06,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22] total 36 [2020-12-22 19:03:06,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976826034] [2020-12-22 19:03:06,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 19:03:06,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:03:06,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 19:03:06,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 19:03:06,112 INFO L87 Difference]: Start difference. First operand 656 states and 796 transitions. Second operand 36 states. [2020-12-22 19:03:07,548 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 19:03:07,819 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-12-22 19:03:08,064 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 19:03:08,321 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 19:03:08,560 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-22 19:03:08,903 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2020-12-22 19:03:09,120 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-12-22 19:03:09,362 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-12-22 19:03:09,773 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-12-22 19:03:10,170 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2020-12-22 19:03:10,554 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2020-12-22 19:03:10,907 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2020-12-22 19:03:10,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:03:10,935 INFO L93 Difference]: Finished difference Result 683 states and 818 transitions. [2020-12-22 19:03:10,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 19:03:10,936 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 74 [2020-12-22 19:03:10,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:03:10,940 INFO L225 Difference]: With dead ends: 683 [2020-12-22 19:03:10,940 INFO L226 Difference]: Without dead ends: 664 [2020-12-22 19:03:10,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=385, Invalid=2807, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 19:03:10,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2020-12-22 19:03:10,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 656. [2020-12-22 19:03:10,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 656 states. [2020-12-22 19:03:10,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 789 transitions. [2020-12-22 19:03:10,948 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 789 transitions. Word has length 74 [2020-12-22 19:03:10,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:03:10,948 INFO L481 AbstractCegarLoop]: Abstraction has 656 states and 789 transitions. [2020-12-22 19:03:10,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 19:03:10,948 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 789 transitions. [2020-12-22 19:03:10,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 19:03:10,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:03:10,950 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:03:11,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 19:03:11,153 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:03:11,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:03:11,154 INFO L82 PathProgramCache]: Analyzing trace with hash 136339069, now seen corresponding path program 9 times [2020-12-22 19:03:11,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:03:11,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784424809] [2020-12-22 19:03:11,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:03:11,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:11,828 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:03:11,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784424809] [2020-12-22 19:03:11,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216854494] [2020-12-22 19:03:11,828 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 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 19:03:12,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 19:03:12,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:03:12,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-22 19:03:12,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:03:12,066 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 19:03:12,068 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:12,076 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:12,077 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:12,077 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-22 19:03:12,674 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2020-12-22 19:03:12,675 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:12,690 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:12,692 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 19:03:12,692 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 19:03:12,791 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-12-22 19:03:12,793 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:12,813 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:12,815 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-22 19:03:12,816 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-12-22 19:03:13,891 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:13,892 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2020-12-22 19:03:13,895 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:03:13,929 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-22 19:03:13,933 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:13,933 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2020-12-22 19:03:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 19:03:13,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:03:13,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 36 [2020-12-22 19:03:13,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264428120] [2020-12-22 19:03:13,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 19:03:13,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:03:13,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 19:03:13,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1173, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 19:03:13,970 INFO L87 Difference]: Start difference. First operand 656 states and 789 transitions. Second operand 36 states. [2020-12-22 19:03:16,191 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 19:03:20,706 WARN L197 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-12-22 19:03:24,899 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:03:27,274 WARN L197 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:03:31,667 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:03:36,142 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:03:38,946 WARN L197 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-22 19:03:43,243 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-22 19:03:47,491 WARN L197 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-22 19:03:48,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:03:48,194 INFO L93 Difference]: Finished difference Result 1045 states and 1227 transitions. [2020-12-22 19:03:48,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 19:03:48,195 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 74 [2020-12-22 19:03:48,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:03:48,198 INFO L225 Difference]: With dead ends: 1045 [2020-12-22 19:03:48,198 INFO L226 Difference]: Without dead ends: 959 [2020-12-22 19:03:48,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 32.7s TimeCoverageRelationStatistics Valid=314, Invalid=2766, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 19:03:48,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2020-12-22 19:03:48,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 908. [2020-12-22 19:03:48,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 908 states. [2020-12-22 19:03:48,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1094 transitions. [2020-12-22 19:03:48,213 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1094 transitions. Word has length 74 [2020-12-22 19:03:48,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:03:48,213 INFO L481 AbstractCegarLoop]: Abstraction has 908 states and 1094 transitions. [2020-12-22 19:03:48,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 19:03:48,214 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1094 transitions. [2020-12-22 19:03:48,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 19:03:48,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:03:48,215 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:03:48,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 19:03:48,430 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:03:48,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:03:48,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1093789664, now seen corresponding path program 1 times [2020-12-22 19:03:48,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:03:48,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025221715] [2020-12-22 19:03:48,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:03:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 19:03:48,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025221715] [2020-12-22 19:03:48,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603228670] [2020-12-22 19:03:48,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:03:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:49,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 19:03:49,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:03:49,384 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 19:03:49,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:03:49,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2020-12-22 19:03:49,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046903019] [2020-12-22 19:03:49,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 19:03:49,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:03:49,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 19:03:49,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2020-12-22 19:03:49,386 INFO L87 Difference]: Start difference. First operand 908 states and 1094 transitions. Second operand 21 states. [2020-12-22 19:03:50,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:03:50,572 INFO L93 Difference]: Finished difference Result 1769 states and 2067 transitions. [2020-12-22 19:03:50,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 19:03:50,573 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 75 [2020-12-22 19:03:50,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:03:50,580 INFO L225 Difference]: With dead ends: 1769 [2020-12-22 19:03:50,580 INFO L226 Difference]: Without dead ends: 1766 [2020-12-22 19:03:50,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2020-12-22 19:03:50,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2020-12-22 19:03:50,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 913. [2020-12-22 19:03:50,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 913 states. [2020-12-22 19:03:50,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1105 transitions. [2020-12-22 19:03:50,604 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1105 transitions. Word has length 75 [2020-12-22 19:03:50,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:03:50,604 INFO L481 AbstractCegarLoop]: Abstraction has 913 states and 1105 transitions. [2020-12-22 19:03:50,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 19:03:50,604 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1105 transitions. [2020-12-22 19:03:50,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 19:03:50,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:03:50,606 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:03:50,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:03:50,821 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:03:50,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:03:50,822 INFO L82 PathProgramCache]: Analyzing trace with hash -839159297, now seen corresponding path program 3 times [2020-12-22 19:03:50,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:03:50,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639338531] [2020-12-22 19:03:50,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:03:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:03:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-12-22 19:03:51,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639338531] [2020-12-22 19:03:51,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654857686] [2020-12-22 19:03:51,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:03:51,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 19:03:51,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:03:51,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 100 conjunts are in the unsatisfiable core [2020-12-22 19:03:51,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:03:51,301 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_37|], 1=[|v_#valid_46|]} [2020-12-22 19:03:51,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:03:51,309 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 19:03:51,310 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:51,328 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:51,337 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 19:03:51,339 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:51,356 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:51,357 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:03:51,358 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:21 [2020-12-22 19:03:51,477 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2020-12-22 19:03:51,478 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:51,500 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:51,502 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 19:03:51,502 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:31 [2020-12-22 19:03:51,571 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2020-12-22 19:03:51,572 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:51,594 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:51,597 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 19:03:51,597 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2020-12-22 19:03:52,642 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:52,643 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 42 [2020-12-22 19:03:52,645 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:03:52,677 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:03:52,679 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 19:03:52,681 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:03:52,681 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:33 [2020-12-22 19:03:53,090 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-12-22 19:03:53,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:03:53,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 25 [2020-12-22 19:03:53,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612510119] [2020-12-22 19:03:53,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 19:03:53,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:03:53,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 19:03:53,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=548, Unknown=0, NotChecked=0, Total=600 [2020-12-22 19:03:53,091 INFO L87 Difference]: Start difference. First operand 913 states and 1105 transitions. Second operand 25 states. [2020-12-22 19:03:55,908 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-12-22 19:03:56,265 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-12-22 19:03:57,150 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-12-22 19:03:57,511 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-12-22 19:03:57,811 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-12-22 19:03:58,323 WARN L197 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 96 [2020-12-22 19:03:58,692 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-12-22 19:03:58,869 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-12-22 19:03:59,353 WARN L197 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2020-12-22 19:03:59,535 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-12-22 19:03:59,756 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-12-22 19:04:00,072 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2020-12-22 19:04:00,320 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-12-22 19:04:00,545 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 19:04:00,877 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-12-22 19:04:01,102 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 19:04:01,895 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-12-22 19:04:02,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:02,694 INFO L93 Difference]: Finished difference Result 2336 states and 2709 transitions. [2020-12-22 19:04:02,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 19:04:02,695 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 77 [2020-12-22 19:04:02,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:02,703 INFO L225 Difference]: With dead ends: 2336 [2020-12-22 19:04:02,703 INFO L226 Difference]: Without dead ends: 2303 [2020-12-22 19:04:02,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=532, Invalid=2548, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 19:04:02,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2020-12-22 19:04:02,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 1340. [2020-12-22 19:04:02,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1340 states. [2020-12-22 19:04:02,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 1634 transitions. [2020-12-22 19:04:02,719 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 1634 transitions. Word has length 77 [2020-12-22 19:04:02,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:02,719 INFO L481 AbstractCegarLoop]: Abstraction has 1340 states and 1634 transitions. [2020-12-22 19:04:02,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 19:04:02,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 1634 transitions. [2020-12-22 19:04:02,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 19:04:02,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:02,721 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:02,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-22 19:04:02,935 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:04:02,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:02,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1083596167, now seen corresponding path program 3 times [2020-12-22 19:04:02,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:02,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652854977] [2020-12-22 19:04:02,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:03,314 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 18 proven. 57 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 19:04:03,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652854977] [2020-12-22 19:04:03,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864944039] [2020-12-22 19:04:03,315 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 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 19:04:03,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 19:04:03,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:03,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 105 conjunts are in the unsatisfiable core [2020-12-22 19:04:03,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:03,530 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_38|], 3=[|v_#valid_47|]} [2020-12-22 19:04:03,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:04:03,539 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 19:04:03,540 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:03,562 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:03,589 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-12-22 19:04:03,589 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2020-12-22 19:04:03,592 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:03,616 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:03,618 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:03,618 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:31 [2020-12-22 19:04:04,030 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2020-12-22 19:04:04,032 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:04,063 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:04,065 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:04,065 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:34 [2020-12-22 19:04:04,168 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2020-12-22 19:04:04,170 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:04,208 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:04,210 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:04,210 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:34 [2020-12-22 19:04:04,319 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2020-12-22 19:04:04,320 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:04,358 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:04,360 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:04,361 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:34 [2020-12-22 19:04:04,563 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 11 [2020-12-22 19:04:04,565 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:04,594 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:04,596 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:04,596 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2020-12-22 19:04:04,690 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2020-12-22 19:04:04,695 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:04,722 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:04,723 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:04:04,723 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:46 [2020-12-22 19:04:05,741 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-22 19:04:05,745 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:04:05,774 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:05,776 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:04:05,776 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:48 [2020-12-22 19:04:06,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 19:04:06,073 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:06,073 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2020-12-22 19:04:06,076 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:04:06,107 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:04:06,109 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 19:04:06,109 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:37 [2020-12-22 19:04:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-12-22 19:04:06,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:06,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 24] total 37 [2020-12-22 19:04:06,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886549397] [2020-12-22 19:04:06,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 19:04:06,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:06,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 19:04:06,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1311, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 19:04:06,888 INFO L87 Difference]: Start difference. First operand 1340 states and 1634 transitions. Second operand 38 states. [2020-12-22 19:04:12,443 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 19:04:12,670 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 19:04:12,987 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 19:04:13,248 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-12-22 19:04:13,741 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-12-22 19:04:14,153 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-12-22 19:04:14,660 WARN L197 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2020-12-22 19:04:15,147 WARN L197 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2020-12-22 19:04:15,652 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2020-12-22 19:04:16,150 WARN L197 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2020-12-22 19:04:16,683 WARN L197 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 84 [2020-12-22 19:04:17,210 WARN L197 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2020-12-22 19:04:18,002 WARN L197 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2020-12-22 19:04:18,647 WARN L197 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 90 [2020-12-22 19:04:19,290 WARN L197 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 93 [2020-12-22 19:04:20,157 WARN L197 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 98 [2020-12-22 19:04:20,670 WARN L197 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-12-22 19:04:21,338 WARN L197 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2020-12-22 19:04:21,939 WARN L197 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-12-22 19:04:22,627 WARN L197 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 91 [2020-12-22 19:04:23,409 WARN L197 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2020-12-22 19:04:24,222 WARN L197 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 102 [2020-12-22 19:04:25,032 WARN L197 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 96 [2020-12-22 19:04:25,676 WARN L197 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-12-22 19:04:26,468 WARN L197 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-12-22 19:04:27,169 WARN L197 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 91 [2020-12-22 19:04:28,406 WARN L197 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 102 [2020-12-22 19:04:29,192 WARN L197 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 96 [2020-12-22 19:04:29,952 WARN L197 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-12-22 19:04:30,606 WARN L197 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-12-22 19:04:31,355 WARN L197 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 91 [2020-12-22 19:04:32,622 WARN L197 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 102 [2020-12-22 19:04:33,407 WARN L197 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 96 [2020-12-22 19:04:34,217 WARN L197 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2020-12-22 19:04:34,868 WARN L197 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2020-12-22 19:04:35,423 WARN L197 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-12-22 19:04:36,325 WARN L197 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 107 [2020-12-22 19:04:37,047 WARN L197 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 91 [2020-12-22 19:04:38,177 WARN L197 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 98 [2020-12-22 19:04:38,893 WARN L197 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2020-12-22 19:04:39,438 WARN L197 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-12-22 19:04:40,095 WARN L197 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 19:04:41,094 WARN L197 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 107 [2020-12-22 19:04:42,133 WARN L197 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 97 [2020-12-22 19:04:42,944 WARN L197 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 104 [2020-12-22 19:04:43,586 WARN L197 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 91 [2020-12-22 19:04:44,493 WARN L197 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 109 [2020-12-22 19:04:45,481 WARN L197 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 95 [2020-12-22 19:04:46,436 WARN L197 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 107 [2020-12-22 19:04:47,498 WARN L197 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 106 [2020-12-22 19:04:48,733 WARN L197 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 102 [2020-12-22 19:04:50,194 WARN L197 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 108 [2020-12-22 19:04:50,935 WARN L197 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 104 [2020-12-22 19:04:51,809 WARN L197 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 115 [2020-12-22 19:04:52,700 WARN L197 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 111 [2020-12-22 19:04:53,737 WARN L197 SmtUtils]: Spent 842.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 120 [2020-12-22 19:04:54,766 WARN L197 SmtUtils]: Spent 863.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 116 [2020-12-22 19:04:55,688 WARN L197 SmtUtils]: Spent 711.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 102 [2020-12-22 19:04:56,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:04:56,246 INFO L93 Difference]: Finished difference Result 1872 states and 2191 transitions. [2020-12-22 19:04:56,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-12-22 19:04:56,248 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 77 [2020-12-22 19:04:56,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:04:56,255 INFO L225 Difference]: With dead ends: 1872 [2020-12-22 19:04:56,255 INFO L226 Difference]: Without dead ends: 1674 [2020-12-22 19:04:56,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3678 ImplicationChecksByTransitivity, 42.5s TimeCoverageRelationStatistics Valid=2585, Invalid=13927, Unknown=0, NotChecked=0, Total=16512 [2020-12-22 19:04:56,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2020-12-22 19:04:56,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1254. [2020-12-22 19:04:56,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1254 states. [2020-12-22 19:04:56,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1523 transitions. [2020-12-22 19:04:56,283 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1523 transitions. Word has length 77 [2020-12-22 19:04:56,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:04:56,283 INFO L481 AbstractCegarLoop]: Abstraction has 1254 states and 1523 transitions. [2020-12-22 19:04:56,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 19:04:56,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1523 transitions. [2020-12-22 19:04:56,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 19:04:56,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:04:56,285 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:04:56,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:04:56,486 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-22 19:04:56,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:04:56,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1469280949, now seen corresponding path program 2 times [2020-12-22 19:04:56,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:04:56,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673158462] [2020-12-22 19:04:56,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:04:56,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:04:56,906 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-22 19:04:56,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673158462] [2020-12-22 19:04:56,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577637379] [2020-12-22 19:04:56,907 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 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 19:04:57,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:04:57,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:04:57,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 19:04:57,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:04:57,621 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-22 19:04:57,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:04:57,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2020-12-22 19:04:57,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279098980] [2020-12-22 19:04:57,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 19:04:57,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:04:57,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 19:04:57,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2020-12-22 19:04:57,623 INFO L87 Difference]: Start difference. First operand 1254 states and 1523 transitions. Second operand 22 states.