/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:07:41,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:07:41,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:07:41,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 16:07:41,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:07:41,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:07:41,646 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:07:41,648 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:07:41,649 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:07:41,651 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:07:41,652 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:07:41,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:07:41,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:07:41,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:07:41,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:07:41,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:07:41,663 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 16:07:41,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:07:41,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:07:41,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:07:41,680 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-21 16:07:41,711 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:07:41,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:07:41,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:07:41,714 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:07:41,714 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:07:41,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:07:41,715 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:07:41,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:07:41,715 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:07:41,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:07:41,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:07:41,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:07:41,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:07:41,716 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:07:41,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:07:41,716 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:07:41,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:07:41,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:07:41,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:07:41,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:07:41,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:07:41,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:07:41,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:07:41,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:07:41,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:07:41,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:07:41,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:07:41,719 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:07:41,719 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:07:42,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:07:42,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:07:42,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:07:42,200 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:07:42,201 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:07:42,202 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2021-02-21 16:07:42,311 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e995199a/f0180b2b427447999a5b3774e13adecf/FLAG1d958c7ba [2021-02-21 16:07:43,111 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:07:43,112 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_10.c [2021-02-21 16:07:43,130 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e995199a/f0180b2b427447999a5b3774e13adecf/FLAG1d958c7ba [2021-02-21 16:07:43,468 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e995199a/f0180b2b427447999a5b3774e13adecf [2021-02-21 16:07:43,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:07:43,492 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:07:43,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:07:43,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:07:43,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:07:43,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:07:43" (1/1) ... [2021-02-21 16:07:43,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@252aeccd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:07:43, skipping insertion in model container [2021-02-21 16:07:43,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:07:43" (1/1) ... [2021-02-21 16:07:43,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:07:43,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:07:43,854 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_10.c[3901,3914] [2021-02-21 16:07:43,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:07:43,882 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:07:43,944 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_10.c[3901,3914] [2021-02-21 16:07:43,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:07:43,980 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:07:43,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:07:43 WrapperNode [2021-02-21 16:07:43,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:07:43,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:07:43,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:07:43,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:07:43,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:07:43" (1/1) ... [2021-02-21 16:07:43,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:07:43" (1/1) ... [2021-02-21 16:07:44,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:07:43" (1/1) ... [2021-02-21 16:07:44,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:07:43" (1/1) ... [2021-02-21 16:07:44,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:07:43" (1/1) ... [2021-02-21 16:07:44,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:07:43" (1/1) ... [2021-02-21 16:07:44,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:07:43" (1/1) ... [2021-02-21 16:07:44,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:07:44,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:07:44,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:07:44,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:07:44,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:07:43" (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 [2021-02-21 16:07:44,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:07:44,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:07:44,148 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:07:44,149 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:07:44,149 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:07:44,149 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:07:44,150 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:07:44,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:07:44,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 16:07:44,152 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:07:44,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:07:44,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:07:44,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:07:44,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:07:44,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:07:44,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:07:44,615 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:07:44,615 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 16:07:44,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:07:44 BoogieIcfgContainer [2021-02-21 16:07:44,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:07:44,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:07:44,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:07:44,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:07:44,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:07:43" (1/3) ... [2021-02-21 16:07:44,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45e9a622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:07:44, skipping insertion in model container [2021-02-21 16:07:44,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:07:43" (2/3) ... [2021-02-21 16:07:44,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45e9a622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:07:44, skipping insertion in model container [2021-02-21 16:07:44,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:07:44" (3/3) ... [2021-02-21 16:07:44,630 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2021-02-21 16:07:44,639 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:07:44,645 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:07:44,670 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:07:44,702 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:07:44,703 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:07:44,703 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:07:44,703 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:07:44,703 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:07:44,703 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:07:44,704 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:07:44,704 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:07:44,724 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2021-02-21 16:07:44,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-21 16:07:44,732 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:44,733 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] [2021-02-21 16:07:44,734 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:44,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:44,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1465526181, now seen corresponding path program 1 times [2021-02-21 16:07:44,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:44,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096973304] [2021-02-21 16:07:44,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:45,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:45,131 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:45,132 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:45,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:07:45,169 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:45,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:45,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:45,256 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:45,257 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:45,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096973304] [2021-02-21 16:07:45,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:45,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:45,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942815730] [2021-02-21 16:07:45,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:45,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:45,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:45,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:45,292 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 4 states. [2021-02-21 16:07:45,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:45,578 INFO L93 Difference]: Finished difference Result 88 states and 151 transitions. [2021-02-21 16:07:45,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:45,581 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-21 16:07:45,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:45,593 INFO L225 Difference]: With dead ends: 88 [2021-02-21 16:07:45,593 INFO L226 Difference]: Without dead ends: 73 [2021-02-21 16:07:45,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:45,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-21 16:07:45,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 51. [2021-02-21 16:07:45,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-02-21 16:07:45,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 90 transitions. [2021-02-21 16:07:45,653 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 90 transitions. Word has length 21 [2021-02-21 16:07:45,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:45,653 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 90 transitions. [2021-02-21 16:07:45,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:45,654 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 90 transitions. [2021-02-21 16:07:45,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-21 16:07:45,655 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:45,655 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] [2021-02-21 16:07:45,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:07:45,656 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:45,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:45,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2052332195, now seen corresponding path program 1 times [2021-02-21 16:07:45,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:45,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639832536] [2021-02-21 16:07:45,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:45,714 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:45,715 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:45,716 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:45,717 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:07:45,721 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:45,722 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:45,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:45,764 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:45,764 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:45,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:45,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639832536] [2021-02-21 16:07:45,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:45,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:45,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821962330] [2021-02-21 16:07:45,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:45,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:45,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:45,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:45,774 INFO L87 Difference]: Start difference. First operand 51 states and 90 transitions. Second operand 4 states. [2021-02-21 16:07:46,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:46,086 INFO L93 Difference]: Finished difference Result 118 states and 213 transitions. [2021-02-21 16:07:46,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:46,088 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-21 16:07:46,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:46,095 INFO L225 Difference]: With dead ends: 118 [2021-02-21 16:07:46,096 INFO L226 Difference]: Without dead ends: 73 [2021-02-21 16:07:46,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:46,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-21 16:07:46,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-02-21 16:07:46,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-02-21 16:07:46,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 126 transitions. [2021-02-21 16:07:46,139 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 126 transitions. Word has length 21 [2021-02-21 16:07:46,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:46,140 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 126 transitions. [2021-02-21 16:07:46,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:46,141 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 126 transitions. [2021-02-21 16:07:46,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-21 16:07:46,143 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:46,143 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] [2021-02-21 16:07:46,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:07:46,144 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:46,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:46,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1813542028, now seen corresponding path program 1 times [2021-02-21 16:07:46,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:46,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970562069] [2021-02-21 16:07:46,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:46,201 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:46,202 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:46,203 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:46,203 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:07:46,227 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:46,228 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:46,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:46,265 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:46,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:46,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970562069] [2021-02-21 16:07:46,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:46,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:46,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912833038] [2021-02-21 16:07:46,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:46,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:46,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:46,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:46,273 INFO L87 Difference]: Start difference. First operand 71 states and 126 transitions. Second operand 4 states. [2021-02-21 16:07:46,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:46,469 INFO L93 Difference]: Finished difference Result 109 states and 190 transitions. [2021-02-21 16:07:46,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:46,470 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-21 16:07:46,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:46,471 INFO L225 Difference]: With dead ends: 109 [2021-02-21 16:07:46,472 INFO L226 Difference]: Without dead ends: 76 [2021-02-21 16:07:46,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:46,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-21 16:07:46,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2021-02-21 16:07:46,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-02-21 16:07:46,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 128 transitions. [2021-02-21 16:07:46,484 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 128 transitions. Word has length 22 [2021-02-21 16:07:46,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:46,485 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 128 transitions. [2021-02-21 16:07:46,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:46,485 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 128 transitions. [2021-02-21 16:07:46,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-21 16:07:46,486 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:46,487 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] [2021-02-21 16:07:46,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 16:07:46,487 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:46,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:46,488 INFO L82 PathProgramCache]: Analyzing trace with hash 802424778, now seen corresponding path program 1 times [2021-02-21 16:07:46,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:46,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507854359] [2021-02-21 16:07:46,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:46,530 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:46,531 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:46,532 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:46,532 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:07:46,536 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:46,537 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:46,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:46,572 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:46,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:46,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507854359] [2021-02-21 16:07:46,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:46,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:46,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879246265] [2021-02-21 16:07:46,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:46,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:46,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:46,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:46,578 INFO L87 Difference]: Start difference. First operand 74 states and 128 transitions. Second operand 4 states. [2021-02-21 16:07:46,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:46,754 INFO L93 Difference]: Finished difference Result 202 states and 360 transitions. [2021-02-21 16:07:46,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:46,755 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-21 16:07:46,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:46,757 INFO L225 Difference]: With dead ends: 202 [2021-02-21 16:07:46,757 INFO L226 Difference]: Without dead ends: 137 [2021-02-21 16:07:46,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:46,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-02-21 16:07:46,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2021-02-21 16:07:46,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2021-02-21 16:07:46,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 237 transitions. [2021-02-21 16:07:46,771 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 237 transitions. Word has length 22 [2021-02-21 16:07:46,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:46,772 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 237 transitions. [2021-02-21 16:07:46,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:46,772 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 237 transitions. [2021-02-21 16:07:46,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-21 16:07:46,773 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:46,774 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] [2021-02-21 16:07:46,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 16:07:46,774 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:46,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:46,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1389230792, now seen corresponding path program 1 times [2021-02-21 16:07:46,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:46,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091096386] [2021-02-21 16:07:46,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:46,810 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:46,810 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:46,811 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:46,812 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:07:46,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:46,816 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:46,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:46,846 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:46,847 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:46,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091096386] [2021-02-21 16:07:46,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:46,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:46,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82544485] [2021-02-21 16:07:46,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:46,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:46,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:46,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:46,852 INFO L87 Difference]: Start difference. First operand 135 states and 237 transitions. Second operand 4 states. [2021-02-21 16:07:47,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:47,048 INFO L93 Difference]: Finished difference Result 175 states and 307 transitions. [2021-02-21 16:07:47,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:47,049 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-21 16:07:47,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:47,051 INFO L225 Difference]: With dead ends: 175 [2021-02-21 16:07:47,052 INFO L226 Difference]: Without dead ends: 173 [2021-02-21 16:07:47,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:47,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-02-21 16:07:47,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 135. [2021-02-21 16:07:47,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2021-02-21 16:07:47,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 235 transitions. [2021-02-21 16:07:47,069 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 235 transitions. Word has length 22 [2021-02-21 16:07:47,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:47,070 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 235 transitions. [2021-02-21 16:07:47,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:47,071 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 235 transitions. [2021-02-21 16:07:47,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-21 16:07:47,072 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:47,073 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] [2021-02-21 16:07:47,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 16:07:47,073 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:47,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:47,074 INFO L82 PathProgramCache]: Analyzing trace with hash -894421934, now seen corresponding path program 1 times [2021-02-21 16:07:47,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:47,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611987997] [2021-02-21 16:07:47,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:47,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:47,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:47,117 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:47,118 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:07:47,124 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:47,126 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:47,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:47,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:47,173 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:47,175 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:47,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611987997] [2021-02-21 16:07:47,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:47,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:47,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202542908] [2021-02-21 16:07:47,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:47,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:47,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:47,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:47,187 INFO L87 Difference]: Start difference. First operand 135 states and 235 transitions. Second operand 4 states. [2021-02-21 16:07:47,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:47,367 INFO L93 Difference]: Finished difference Result 251 states and 443 transitions. [2021-02-21 16:07:47,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:47,368 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-21 16:07:47,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:47,370 INFO L225 Difference]: With dead ends: 251 [2021-02-21 16:07:47,370 INFO L226 Difference]: Without dead ends: 249 [2021-02-21 16:07:47,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:47,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-02-21 16:07:47,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 183. [2021-02-21 16:07:47,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2021-02-21 16:07:47,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 317 transitions. [2021-02-21 16:07:47,386 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 317 transitions. Word has length 23 [2021-02-21 16:07:47,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:47,387 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 317 transitions. [2021-02-21 16:07:47,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:47,387 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 317 transitions. [2021-02-21 16:07:47,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-21 16:07:47,389 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:47,389 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] [2021-02-21 16:07:47,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 16:07:47,390 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:47,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:47,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1481227948, now seen corresponding path program 1 times [2021-02-21 16:07:47,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:47,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112851747] [2021-02-21 16:07:47,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:47,419 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:47,420 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:47,421 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:47,422 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:07:47,425 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:47,426 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:47,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:47,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:47,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:47,458 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:47,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112851747] [2021-02-21 16:07:47,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:47,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:47,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431155719] [2021-02-21 16:07:47,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:47,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:47,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:47,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:47,463 INFO L87 Difference]: Start difference. First operand 183 states and 317 transitions. Second operand 4 states. [2021-02-21 16:07:47,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:47,609 INFO L93 Difference]: Finished difference Result 431 states and 755 transitions. [2021-02-21 16:07:47,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:47,610 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-21 16:07:47,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:47,612 INFO L225 Difference]: With dead ends: 431 [2021-02-21 16:07:47,612 INFO L226 Difference]: Without dead ends: 257 [2021-02-21 16:07:47,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:47,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-02-21 16:07:47,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 255. [2021-02-21 16:07:47,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2021-02-21 16:07:47,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 439 transitions. [2021-02-21 16:07:47,631 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 439 transitions. Word has length 23 [2021-02-21 16:07:47,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:47,631 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 439 transitions. [2021-02-21 16:07:47,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:47,632 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 439 transitions. [2021-02-21 16:07:47,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-21 16:07:47,633 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:47,634 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] [2021-02-21 16:07:47,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 16:07:47,634 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:47,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:47,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1957062113, now seen corresponding path program 1 times [2021-02-21 16:07:47,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:47,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574169382] [2021-02-21 16:07:47,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:47,662 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:47,663 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:47,663 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:47,664 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:07:47,667 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:47,668 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:47,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:47,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:47,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:47,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:47,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574169382] [2021-02-21 16:07:47,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:47,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:47,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264396709] [2021-02-21 16:07:47,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:47,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:47,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:47,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:47,700 INFO L87 Difference]: Start difference. First operand 255 states and 439 transitions. Second operand 4 states. [2021-02-21 16:07:47,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:47,845 INFO L93 Difference]: Finished difference Result 385 states and 661 transitions. [2021-02-21 16:07:47,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:47,846 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-21 16:07:47,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:47,848 INFO L225 Difference]: With dead ends: 385 [2021-02-21 16:07:47,848 INFO L226 Difference]: Without dead ends: 263 [2021-02-21 16:07:47,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:47,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-02-21 16:07:47,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 261. [2021-02-21 16:07:47,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2021-02-21 16:07:47,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 443 transitions. [2021-02-21 16:07:47,865 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 443 transitions. Word has length 24 [2021-02-21 16:07:47,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:47,865 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 443 transitions. [2021-02-21 16:07:47,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:47,865 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 443 transitions. [2021-02-21 16:07:47,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-21 16:07:47,867 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:47,868 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] [2021-02-21 16:07:47,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 16:07:47,868 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:47,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:47,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1326787933, now seen corresponding path program 1 times [2021-02-21 16:07:47,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:47,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144430387] [2021-02-21 16:07:47,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:47,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:47,896 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:47,897 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:47,897 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:47,898 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:07:47,901 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:47,902 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:47,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:47,928 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:47,929 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:47,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144430387] [2021-02-21 16:07:47,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:47,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:47,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338405051] [2021-02-21 16:07:47,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:47,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:47,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:47,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:47,933 INFO L87 Difference]: Start difference. First operand 261 states and 443 transitions. Second operand 4 states. [2021-02-21 16:07:48,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:48,077 INFO L93 Difference]: Finished difference Result 477 states and 821 transitions. [2021-02-21 16:07:48,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:48,077 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-21 16:07:48,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:48,081 INFO L225 Difference]: With dead ends: 477 [2021-02-21 16:07:48,081 INFO L226 Difference]: Without dead ends: 475 [2021-02-21 16:07:48,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:48,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-02-21 16:07:48,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 361. [2021-02-21 16:07:48,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2021-02-21 16:07:48,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 603 transitions. [2021-02-21 16:07:48,097 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 603 transitions. Word has length 24 [2021-02-21 16:07:48,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:48,098 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 603 transitions. [2021-02-21 16:07:48,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:48,098 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 603 transitions. [2021-02-21 16:07:48,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-21 16:07:48,101 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:48,101 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] [2021-02-21 16:07:48,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 16:07:48,101 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:48,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:48,102 INFO L82 PathProgramCache]: Analyzing trace with hash 739981919, now seen corresponding path program 1 times [2021-02-21 16:07:48,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:48,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406517544] [2021-02-21 16:07:48,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:48,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:48,145 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:48,145 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:48,146 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:48,146 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:07:48,149 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:48,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:48,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:48,195 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:48,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:48,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:48,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406517544] [2021-02-21 16:07:48,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:48,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:48,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753691562] [2021-02-21 16:07:48,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:48,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:48,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:48,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:48,202 INFO L87 Difference]: Start difference. First operand 361 states and 603 transitions. Second operand 4 states. [2021-02-21 16:07:48,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:48,383 INFO L93 Difference]: Finished difference Result 845 states and 1421 transitions. [2021-02-21 16:07:48,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:48,384 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-21 16:07:48,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:48,387 INFO L225 Difference]: With dead ends: 845 [2021-02-21 16:07:48,388 INFO L226 Difference]: Without dead ends: 499 [2021-02-21 16:07:48,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:48,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-02-21 16:07:48,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 497. [2021-02-21 16:07:48,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2021-02-21 16:07:48,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 823 transitions. [2021-02-21 16:07:48,412 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 823 transitions. Word has length 24 [2021-02-21 16:07:48,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:48,413 INFO L480 AbstractCegarLoop]: Abstraction has 497 states and 823 transitions. [2021-02-21 16:07:48,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:48,413 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 823 transitions. [2021-02-21 16:07:48,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-21 16:07:48,415 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:48,415 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] [2021-02-21 16:07:48,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 16:07:48,416 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:48,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:48,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1819032631, now seen corresponding path program 1 times [2021-02-21 16:07:48,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:48,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930887153] [2021-02-21 16:07:48,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:48,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:48,442 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:48,442 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:48,443 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:48,444 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:07:48,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:48,447 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:48,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:48,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:48,477 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:48,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930887153] [2021-02-21 16:07:48,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:48,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:48,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84738740] [2021-02-21 16:07:48,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:48,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:48,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:48,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:48,484 INFO L87 Difference]: Start difference. First operand 497 states and 823 transitions. Second operand 4 states. [2021-02-21 16:07:48,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:48,635 INFO L93 Difference]: Finished difference Result 745 states and 1229 transitions. [2021-02-21 16:07:48,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:48,635 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-21 16:07:48,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:48,640 INFO L225 Difference]: With dead ends: 745 [2021-02-21 16:07:48,640 INFO L226 Difference]: Without dead ends: 507 [2021-02-21 16:07:48,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:48,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-02-21 16:07:48,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 505. [2021-02-21 16:07:48,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2021-02-21 16:07:48,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 823 transitions. [2021-02-21 16:07:48,667 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 823 transitions. Word has length 25 [2021-02-21 16:07:48,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:48,667 INFO L480 AbstractCegarLoop]: Abstraction has 505 states and 823 transitions. [2021-02-21 16:07:48,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:48,667 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 823 transitions. [2021-02-21 16:07:48,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-21 16:07:48,672 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:48,673 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] [2021-02-21 16:07:48,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-21 16:07:48,673 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:48,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:48,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1464817415, now seen corresponding path program 1 times [2021-02-21 16:07:48,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:48,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296618988] [2021-02-21 16:07:48,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:48,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:48,734 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:48,735 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:48,736 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:48,736 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:07:48,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:48,740 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:48,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:48,780 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:48,781 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:48,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:48,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296618988] [2021-02-21 16:07:48,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:48,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:48,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708810452] [2021-02-21 16:07:48,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:48,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:48,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:48,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:48,789 INFO L87 Difference]: Start difference. First operand 505 states and 823 transitions. Second operand 4 states. [2021-02-21 16:07:48,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:48,954 INFO L93 Difference]: Finished difference Result 909 states and 1505 transitions. [2021-02-21 16:07:48,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:48,955 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-21 16:07:48,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:48,961 INFO L225 Difference]: With dead ends: 909 [2021-02-21 16:07:48,961 INFO L226 Difference]: Without dead ends: 907 [2021-02-21 16:07:48,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:48,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-02-21 16:07:48,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 713. [2021-02-21 16:07:48,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2021-02-21 16:07:48,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1135 transitions. [2021-02-21 16:07:48,990 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1135 transitions. Word has length 25 [2021-02-21 16:07:48,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:48,990 INFO L480 AbstractCegarLoop]: Abstraction has 713 states and 1135 transitions. [2021-02-21 16:07:48,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:48,991 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1135 transitions. [2021-02-21 16:07:48,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-21 16:07:48,992 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:48,992 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] [2021-02-21 16:07:48,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-21 16:07:48,993 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:48,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:48,993 INFO L82 PathProgramCache]: Analyzing trace with hash 878011401, now seen corresponding path program 1 times [2021-02-21 16:07:48,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:48,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207333691] [2021-02-21 16:07:48,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:49,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:49,015 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:49,016 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:49,016 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:07:49,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:49,020 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:49,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:49,046 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:49,047 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:49,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207333691] [2021-02-21 16:07:49,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:49,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:49,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223953240] [2021-02-21 16:07:49,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:49,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:49,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:49,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:49,051 INFO L87 Difference]: Start difference. First operand 713 states and 1135 transitions. Second operand 4 states. [2021-02-21 16:07:49,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:49,212 INFO L93 Difference]: Finished difference Result 1661 states and 2657 transitions. [2021-02-21 16:07:49,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:49,213 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-21 16:07:49,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:49,218 INFO L225 Difference]: With dead ends: 1661 [2021-02-21 16:07:49,219 INFO L226 Difference]: Without dead ends: 971 [2021-02-21 16:07:49,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:49,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-02-21 16:07:49,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 969. [2021-02-21 16:07:49,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 969 states. [2021-02-21 16:07:49,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1527 transitions. [2021-02-21 16:07:49,260 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1527 transitions. Word has length 25 [2021-02-21 16:07:49,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:49,260 INFO L480 AbstractCegarLoop]: Abstraction has 969 states and 1527 transitions. [2021-02-21 16:07:49,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:49,261 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1527 transitions. [2021-02-21 16:07:49,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-21 16:07:49,262 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:49,263 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, 1] [2021-02-21 16:07:49,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-21 16:07:49,263 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:49,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:49,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1835085644, now seen corresponding path program 1 times [2021-02-21 16:07:49,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:49,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334049218] [2021-02-21 16:07:49,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:49,284 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:49,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:49,285 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:49,286 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:07:49,290 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:49,290 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:49,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:49,317 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:49,318 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:49,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:49,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334049218] [2021-02-21 16:07:49,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:49,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:49,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267741113] [2021-02-21 16:07:49,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:49,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:49,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:49,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:49,322 INFO L87 Difference]: Start difference. First operand 969 states and 1527 transitions. Second operand 4 states. [2021-02-21 16:07:49,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:49,499 INFO L93 Difference]: Finished difference Result 1453 states and 2281 transitions. [2021-02-21 16:07:49,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:49,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-02-21 16:07:49,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:49,505 INFO L225 Difference]: With dead ends: 1453 [2021-02-21 16:07:49,505 INFO L226 Difference]: Without dead ends: 987 [2021-02-21 16:07:49,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:49,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-02-21 16:07:49,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 985. [2021-02-21 16:07:49,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2021-02-21 16:07:49,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1527 transitions. [2021-02-21 16:07:49,551 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1527 transitions. Word has length 26 [2021-02-21 16:07:49,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:49,551 INFO L480 AbstractCegarLoop]: Abstraction has 985 states and 1527 transitions. [2021-02-21 16:07:49,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:49,551 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1527 transitions. [2021-02-21 16:07:49,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-21 16:07:49,553 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:49,553 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, 1] [2021-02-21 16:07:49,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-21 16:07:49,554 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:49,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:49,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1448764402, now seen corresponding path program 1 times [2021-02-21 16:07:49,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:49,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675903284] [2021-02-21 16:07:49,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:49,575 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:49,576 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:49,577 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:49,577 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:07:49,580 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:49,581 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:49,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:49,606 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:49,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:49,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:49,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675903284] [2021-02-21 16:07:49,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:49,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:49,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243943746] [2021-02-21 16:07:49,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:49,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:49,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:49,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:49,612 INFO L87 Difference]: Start difference. First operand 985 states and 1527 transitions. Second operand 4 states. [2021-02-21 16:07:49,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:49,781 INFO L93 Difference]: Finished difference Result 1741 states and 2745 transitions. [2021-02-21 16:07:49,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:49,781 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-02-21 16:07:49,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:49,791 INFO L225 Difference]: With dead ends: 1741 [2021-02-21 16:07:49,791 INFO L226 Difference]: Without dead ends: 1739 [2021-02-21 16:07:49,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:49,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2021-02-21 16:07:49,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1417. [2021-02-21 16:07:49,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1417 states. [2021-02-21 16:07:49,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 2135 transitions. [2021-02-21 16:07:49,845 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 2135 transitions. Word has length 26 [2021-02-21 16:07:49,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:49,845 INFO L480 AbstractCegarLoop]: Abstraction has 1417 states and 2135 transitions. [2021-02-21 16:07:49,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:49,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 2135 transitions. [2021-02-21 16:07:49,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-21 16:07:49,848 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:49,849 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, 1] [2021-02-21 16:07:49,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-21 16:07:49,849 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:49,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:49,850 INFO L82 PathProgramCache]: Analyzing trace with hash 861958388, now seen corresponding path program 1 times [2021-02-21 16:07:49,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:49,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247421014] [2021-02-21 16:07:49,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:49,868 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:49,869 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:49,870 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:49,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:07:49,873 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:49,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:49,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:49,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:49,902 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:49,903 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:49,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247421014] [2021-02-21 16:07:49,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:49,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:49,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840575149] [2021-02-21 16:07:49,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:49,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:49,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:49,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:49,907 INFO L87 Difference]: Start difference. First operand 1417 states and 2135 transitions. Second operand 4 states. [2021-02-21 16:07:50,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:50,073 INFO L93 Difference]: Finished difference Result 3277 states and 4953 transitions. [2021-02-21 16:07:50,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:50,073 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-02-21 16:07:50,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:50,083 INFO L225 Difference]: With dead ends: 3277 [2021-02-21 16:07:50,083 INFO L226 Difference]: Without dead ends: 1899 [2021-02-21 16:07:50,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:50,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-02-21 16:07:50,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1897. [2021-02-21 16:07:50,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1897 states. [2021-02-21 16:07:50,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 2823 transitions. [2021-02-21 16:07:50,211 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 2823 transitions. Word has length 26 [2021-02-21 16:07:50,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:50,212 INFO L480 AbstractCegarLoop]: Abstraction has 1897 states and 2823 transitions. [2021-02-21 16:07:50,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:50,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 2823 transitions. [2021-02-21 16:07:50,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-21 16:07:50,215 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:50,215 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, 1, 1] [2021-02-21 16:07:50,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-21 16:07:50,215 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:50,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:50,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1962238590, now seen corresponding path program 1 times [2021-02-21 16:07:50,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:50,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641527658] [2021-02-21 16:07:50,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:50,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:50,236 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:50,237 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:50,238 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:07:50,242 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:50,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:50,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:50,270 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:50,271 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:50,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:50,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641527658] [2021-02-21 16:07:50,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:50,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:50,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172190320] [2021-02-21 16:07:50,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:50,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:50,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:50,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:50,282 INFO L87 Difference]: Start difference. First operand 1897 states and 2823 transitions. Second operand 4 states. [2021-02-21 16:07:50,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:50,479 INFO L93 Difference]: Finished difference Result 2845 states and 4217 transitions. [2021-02-21 16:07:50,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:50,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2021-02-21 16:07:50,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:50,491 INFO L225 Difference]: With dead ends: 2845 [2021-02-21 16:07:50,491 INFO L226 Difference]: Without dead ends: 1931 [2021-02-21 16:07:50,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:50,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2021-02-21 16:07:50,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1929. [2021-02-21 16:07:50,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1929 states. [2021-02-21 16:07:50,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 2823 transitions. [2021-02-21 16:07:50,583 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 2823 transitions. Word has length 27 [2021-02-21 16:07:50,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:50,584 INFO L480 AbstractCegarLoop]: Abstraction has 1929 states and 2823 transitions. [2021-02-21 16:07:50,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:50,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 2823 transitions. [2021-02-21 16:07:50,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-21 16:07:50,587 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:50,587 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, 1, 1] [2021-02-21 16:07:50,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-21 16:07:50,587 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:50,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:50,588 INFO L82 PathProgramCache]: Analyzing trace with hash 951121340, now seen corresponding path program 1 times [2021-02-21 16:07:50,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:50,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368148719] [2021-02-21 16:07:50,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:50,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:50,607 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:50,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:50,608 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:50,609 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:07:50,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:50,612 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:50,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:50,634 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:50,635 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:50,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368148719] [2021-02-21 16:07:50,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:50,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:50,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806719130] [2021-02-21 16:07:50,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:50,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:50,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:50,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:50,639 INFO L87 Difference]: Start difference. First operand 1929 states and 2823 transitions. Second operand 4 states. [2021-02-21 16:07:50,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:50,828 INFO L93 Difference]: Finished difference Result 3341 states and 4969 transitions. [2021-02-21 16:07:50,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:50,828 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2021-02-21 16:07:50,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:50,846 INFO L225 Difference]: With dead ends: 3341 [2021-02-21 16:07:50,846 INFO L226 Difference]: Without dead ends: 3339 [2021-02-21 16:07:50,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:50,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2021-02-21 16:07:50,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 2825. [2021-02-21 16:07:50,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2825 states. [2021-02-21 16:07:50,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 4007 transitions. [2021-02-21 16:07:50,989 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 4007 transitions. Word has length 27 [2021-02-21 16:07:50,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:50,989 INFO L480 AbstractCegarLoop]: Abstraction has 2825 states and 4007 transitions. [2021-02-21 16:07:50,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:50,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 4007 transitions. [2021-02-21 16:07:50,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-21 16:07:50,994 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:50,994 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, 1, 1] [2021-02-21 16:07:50,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-02-21 16:07:50,995 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:50,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:50,995 INFO L82 PathProgramCache]: Analyzing trace with hash 364315326, now seen corresponding path program 1 times [2021-02-21 16:07:50,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:50,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173934473] [2021-02-21 16:07:50,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:51,032 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:51,035 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:51,036 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:51,036 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:07:51,041 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:51,044 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:51,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:51,071 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:51,072 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:51,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173934473] [2021-02-21 16:07:51,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:51,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:51,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225022131] [2021-02-21 16:07:51,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:51,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:51,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:51,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:51,076 INFO L87 Difference]: Start difference. First operand 2825 states and 4007 transitions. Second operand 4 states. [2021-02-21 16:07:51,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:51,280 INFO L93 Difference]: Finished difference Result 6477 states and 9193 transitions. [2021-02-21 16:07:51,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:51,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2021-02-21 16:07:51,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:51,300 INFO L225 Difference]: With dead ends: 6477 [2021-02-21 16:07:51,300 INFO L226 Difference]: Without dead ends: 3723 [2021-02-21 16:07:51,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:51,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2021-02-21 16:07:51,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3721. [2021-02-21 16:07:51,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3721 states. [2021-02-21 16:07:51,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3721 states to 3721 states and 5191 transitions. [2021-02-21 16:07:51,461 INFO L78 Accepts]: Start accepts. Automaton has 3721 states and 5191 transitions. Word has length 27 [2021-02-21 16:07:51,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:51,487 INFO L480 AbstractCegarLoop]: Abstraction has 3721 states and 5191 transitions. [2021-02-21 16:07:51,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:51,487 INFO L276 IsEmpty]: Start isEmpty. Operand 3721 states and 5191 transitions. [2021-02-21 16:07:51,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-21 16:07:51,493 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:51,493 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, 1, 1, 1] [2021-02-21 16:07:51,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-02-21 16:07:51,493 INFO L428 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:51,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:51,494 INFO L82 PathProgramCache]: Analyzing trace with hash -579794103, now seen corresponding path program 1 times [2021-02-21 16:07:51,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:51,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711766109] [2021-02-21 16:07:51,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:51,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:51,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:51,513 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:51,514 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:07:51,516 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:51,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:51,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:51,539 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:51,539 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:51,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:51,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711766109] [2021-02-21 16:07:51,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:51,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:51,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239209147] [2021-02-21 16:07:51,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:51,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:51,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:51,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:51,543 INFO L87 Difference]: Start difference. First operand 3721 states and 5191 transitions. Second operand 4 states. [2021-02-21 16:07:51,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:51,725 INFO L93 Difference]: Finished difference Result 5581 states and 7753 transitions. [2021-02-21 16:07:51,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:51,726 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2021-02-21 16:07:51,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:51,745 INFO L225 Difference]: With dead ends: 5581 [2021-02-21 16:07:51,746 INFO L226 Difference]: Without dead ends: 3787 [2021-02-21 16:07:51,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:51,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3787 states. [2021-02-21 16:07:51,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3787 to 3785. [2021-02-21 16:07:51,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3785 states. [2021-02-21 16:07:51,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5191 transitions. [2021-02-21 16:07:51,903 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5191 transitions. Word has length 28 [2021-02-21 16:07:51,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:51,903 INFO L480 AbstractCegarLoop]: Abstraction has 3785 states and 5191 transitions. [2021-02-21 16:07:51,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:51,903 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5191 transitions. [2021-02-21 16:07:51,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-21 16:07:51,908 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:51,909 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, 1, 1, 1] [2021-02-21 16:07:51,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-02-21 16:07:51,909 INFO L428 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:51,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:51,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1590911353, now seen corresponding path program 1 times [2021-02-21 16:07:51,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:51,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154672610] [2021-02-21 16:07:51,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:51,927 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:51,927 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:51,928 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:51,928 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:07:51,931 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:51,932 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:51,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:51,954 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:51,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:51,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154672610] [2021-02-21 16:07:51,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:51,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:51,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089235792] [2021-02-21 16:07:51,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:51,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:51,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:51,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:51,958 INFO L87 Difference]: Start difference. First operand 3785 states and 5191 transitions. Second operand 4 states. [2021-02-21 16:07:52,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:52,270 INFO L93 Difference]: Finished difference Result 6413 states and 8905 transitions. [2021-02-21 16:07:52,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:52,271 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2021-02-21 16:07:52,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:52,303 INFO L225 Difference]: With dead ends: 6413 [2021-02-21 16:07:52,303 INFO L226 Difference]: Without dead ends: 6411 [2021-02-21 16:07:52,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:52,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6411 states. [2021-02-21 16:07:52,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6411 to 5641. [2021-02-21 16:07:52,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5641 states. [2021-02-21 16:07:52,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5641 states to 5641 states and 7495 transitions. [2021-02-21 16:07:52,508 INFO L78 Accepts]: Start accepts. Automaton has 5641 states and 7495 transitions. Word has length 28 [2021-02-21 16:07:52,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:52,508 INFO L480 AbstractCegarLoop]: Abstraction has 5641 states and 7495 transitions. [2021-02-21 16:07:52,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:52,508 INFO L276 IsEmpty]: Start isEmpty. Operand 5641 states and 7495 transitions. [2021-02-21 16:07:52,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-21 16:07:52,520 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:52,520 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, 1, 1, 1] [2021-02-21 16:07:52,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-02-21 16:07:52,521 INFO L428 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:52,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:52,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2117249929, now seen corresponding path program 1 times [2021-02-21 16:07:52,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:52,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199421821] [2021-02-21 16:07:52,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:52,551 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:52,553 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:52,554 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:52,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:07:52,557 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:52,557 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:52,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:52,580 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:52,581 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:52,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:52,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199421821] [2021-02-21 16:07:52,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:52,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:52,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860571812] [2021-02-21 16:07:52,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:52,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:52,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:52,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:52,585 INFO L87 Difference]: Start difference. First operand 5641 states and 7495 transitions. Second operand 4 states. [2021-02-21 16:07:52,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:52,888 INFO L93 Difference]: Finished difference Result 12813 states and 16969 transitions. [2021-02-21 16:07:52,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:52,888 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2021-02-21 16:07:52,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:52,905 INFO L225 Difference]: With dead ends: 12813 [2021-02-21 16:07:52,905 INFO L226 Difference]: Without dead ends: 7307 [2021-02-21 16:07:52,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:52,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7307 states. [2021-02-21 16:07:53,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7307 to 7305. [2021-02-21 16:07:53,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7305 states. [2021-02-21 16:07:53,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7305 states to 7305 states and 9479 transitions. [2021-02-21 16:07:53,157 INFO L78 Accepts]: Start accepts. Automaton has 7305 states and 9479 transitions. Word has length 28 [2021-02-21 16:07:53,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:53,157 INFO L480 AbstractCegarLoop]: Abstraction has 7305 states and 9479 transitions. [2021-02-21 16:07:53,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:53,158 INFO L276 IsEmpty]: Start isEmpty. Operand 7305 states and 9479 transitions. [2021-02-21 16:07:53,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-21 16:07:53,167 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:53,167 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, 1, 1, 1, 1] [2021-02-21 16:07:53,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-02-21 16:07:53,168 INFO L428 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:53,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:53,168 INFO L82 PathProgramCache]: Analyzing trace with hash -2073395917, now seen corresponding path program 1 times [2021-02-21 16:07:53,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:53,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363450592] [2021-02-21 16:07:53,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:53,185 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:53,186 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:53,187 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:53,187 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:07:53,190 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:53,190 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:53,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:53,212 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:53,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:53,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363450592] [2021-02-21 16:07:53,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:53,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:53,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340120695] [2021-02-21 16:07:53,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:53,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:53,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:53,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:53,217 INFO L87 Difference]: Start difference. First operand 7305 states and 9479 transitions. Second operand 4 states. [2021-02-21 16:07:53,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:53,487 INFO L93 Difference]: Finished difference Result 10957 states and 14153 transitions. [2021-02-21 16:07:53,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:53,488 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-02-21 16:07:53,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:53,503 INFO L225 Difference]: With dead ends: 10957 [2021-02-21 16:07:53,503 INFO L226 Difference]: Without dead ends: 7435 [2021-02-21 16:07:53,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:53,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7435 states. [2021-02-21 16:07:53,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7435 to 7433. [2021-02-21 16:07:53,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7433 states. [2021-02-21 16:07:53,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7433 states to 7433 states and 9479 transitions. [2021-02-21 16:07:53,817 INFO L78 Accepts]: Start accepts. Automaton has 7433 states and 9479 transitions. Word has length 29 [2021-02-21 16:07:53,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:53,817 INFO L480 AbstractCegarLoop]: Abstraction has 7433 states and 9479 transitions. [2021-02-21 16:07:53,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:53,817 INFO L276 IsEmpty]: Start isEmpty. Operand 7433 states and 9479 transitions. [2021-02-21 16:07:53,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-21 16:07:53,827 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:53,827 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, 1, 1, 1, 1] [2021-02-21 16:07:53,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-02-21 16:07:53,827 INFO L428 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:53,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:53,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1210454129, now seen corresponding path program 1 times [2021-02-21 16:07:53,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:53,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741613700] [2021-02-21 16:07:53,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:53,848 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:53,849 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:53,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:53,853 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:07:53,856 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:53,856 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:53,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:53,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:53,881 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:53,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741613700] [2021-02-21 16:07:53,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:53,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:53,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695785748] [2021-02-21 16:07:53,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:53,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:53,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:53,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:53,885 INFO L87 Difference]: Start difference. First operand 7433 states and 9479 transitions. Second operand 4 states. [2021-02-21 16:07:54,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:54,262 INFO L93 Difference]: Finished difference Result 12301 states and 15753 transitions. [2021-02-21 16:07:54,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:54,263 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-02-21 16:07:54,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:54,290 INFO L225 Difference]: With dead ends: 12301 [2021-02-21 16:07:54,290 INFO L226 Difference]: Without dead ends: 12299 [2021-02-21 16:07:54,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:54,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12299 states. [2021-02-21 16:07:54,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12299 to 11273. [2021-02-21 16:07:54,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11273 states. [2021-02-21 16:07:54,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11273 states to 11273 states and 13959 transitions. [2021-02-21 16:07:54,758 INFO L78 Accepts]: Start accepts. Automaton has 11273 states and 13959 transitions. Word has length 29 [2021-02-21 16:07:54,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:54,759 INFO L480 AbstractCegarLoop]: Abstraction has 11273 states and 13959 transitions. [2021-02-21 16:07:54,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:54,759 INFO L276 IsEmpty]: Start isEmpty. Operand 11273 states and 13959 transitions. [2021-02-21 16:07:54,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-21 16:07:54,782 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:54,782 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, 1, 1, 1, 1] [2021-02-21 16:07:54,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-02-21 16:07:54,782 INFO L428 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:54,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:54,783 INFO L82 PathProgramCache]: Analyzing trace with hash 623648115, now seen corresponding path program 1 times [2021-02-21 16:07:54,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:54,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913583256] [2021-02-21 16:07:54,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:54,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:54,821 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:54,822 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:54,822 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:54,823 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:07:54,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:54,833 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:54,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:54,857 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:54,859 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:54,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913583256] [2021-02-21 16:07:54,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:54,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:54,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175962881] [2021-02-21 16:07:54,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:54,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:54,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:54,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:54,863 INFO L87 Difference]: Start difference. First operand 11273 states and 13959 transitions. Second operand 4 states. [2021-02-21 16:07:55,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:55,338 INFO L93 Difference]: Finished difference Result 25357 states and 31113 transitions. [2021-02-21 16:07:55,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:55,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-02-21 16:07:55,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:55,368 INFO L225 Difference]: With dead ends: 25357 [2021-02-21 16:07:55,368 INFO L226 Difference]: Without dead ends: 14347 [2021-02-21 16:07:55,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:55,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14347 states. [2021-02-21 16:07:55,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14347 to 14345. [2021-02-21 16:07:55,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14345 states. [2021-02-21 16:07:55,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14345 states to 14345 states and 17159 transitions. [2021-02-21 16:07:55,942 INFO L78 Accepts]: Start accepts. Automaton has 14345 states and 17159 transitions. Word has length 29 [2021-02-21 16:07:55,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:55,942 INFO L480 AbstractCegarLoop]: Abstraction has 14345 states and 17159 transitions. [2021-02-21 16:07:55,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:55,942 INFO L276 IsEmpty]: Start isEmpty. Operand 14345 states and 17159 transitions. [2021-02-21 16:07:55,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-21 16:07:55,962 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:55,962 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, 1, 1, 1, 1, 1] [2021-02-21 16:07:55,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-02-21 16:07:55,962 INFO L428 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:55,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:55,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1130411554, now seen corresponding path program 1 times [2021-02-21 16:07:55,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:55,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204355776] [2021-02-21 16:07:55,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:55,978 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:55,979 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:55,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:55,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:07:55,982 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:55,983 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:56,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:56,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:56,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:56,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204355776] [2021-02-21 16:07:56,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:56,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:56,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004087925] [2021-02-21 16:07:56,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:56,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:56,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:56,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:56,010 INFO L87 Difference]: Start difference. First operand 14345 states and 17159 transitions. Second operand 4 states. [2021-02-21 16:07:56,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:56,383 INFO L93 Difference]: Finished difference Result 21517 states and 25609 transitions. [2021-02-21 16:07:56,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:56,384 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2021-02-21 16:07:56,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:56,414 INFO L225 Difference]: With dead ends: 21517 [2021-02-21 16:07:56,415 INFO L226 Difference]: Without dead ends: 14603 [2021-02-21 16:07:56,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:56,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14603 states. [2021-02-21 16:07:56,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14603 to 14601. [2021-02-21 16:07:56,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14601 states. [2021-02-21 16:07:56,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14601 states to 14601 states and 17159 transitions. [2021-02-21 16:07:56,939 INFO L78 Accepts]: Start accepts. Automaton has 14601 states and 17159 transitions. Word has length 30 [2021-02-21 16:07:56,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:56,939 INFO L480 AbstractCegarLoop]: Abstraction has 14601 states and 17159 transitions. [2021-02-21 16:07:56,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:56,939 INFO L276 IsEmpty]: Start isEmpty. Operand 14601 states and 17159 transitions. [2021-02-21 16:07:56,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-21 16:07:56,957 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:56,957 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, 1, 1, 1, 1, 1] [2021-02-21 16:07:56,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-02-21 16:07:56,958 INFO L428 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:56,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:56,958 INFO L82 PathProgramCache]: Analyzing trace with hash -2141528804, now seen corresponding path program 1 times [2021-02-21 16:07:56,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:56,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144738549] [2021-02-21 16:07:56,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:56,973 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:56,974 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:56,975 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:56,975 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:07:56,978 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:56,978 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:56,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:57,000 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:57,000 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:57,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:57,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144738549] [2021-02-21 16:07:57,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:57,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:57,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087377892] [2021-02-21 16:07:57,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:57,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:57,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:57,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:57,004 INFO L87 Difference]: Start difference. First operand 14601 states and 17159 transitions. Second operand 4 states. [2021-02-21 16:07:57,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:57,637 INFO L93 Difference]: Finished difference Result 42251 states and 48392 transitions. [2021-02-21 16:07:57,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:57,638 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2021-02-21 16:07:57,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:57,666 INFO L225 Difference]: With dead ends: 42251 [2021-02-21 16:07:57,666 INFO L226 Difference]: Without dead ends: 14601 [2021-02-21 16:07:57,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:57,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14601 states. [2021-02-21 16:07:58,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14601 to 14601. [2021-02-21 16:07:58,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14601 states. [2021-02-21 16:07:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14601 states to 14601 states and 16135 transitions. [2021-02-21 16:07:58,299 INFO L78 Accepts]: Start accepts. Automaton has 14601 states and 16135 transitions. Word has length 30 [2021-02-21 16:07:58,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:58,299 INFO L480 AbstractCegarLoop]: Abstraction has 14601 states and 16135 transitions. [2021-02-21 16:07:58,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:58,299 INFO L276 IsEmpty]: Start isEmpty. Operand 14601 states and 16135 transitions. [2021-02-21 16:07:58,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-21 16:07:58,315 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:07:58,316 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, 1, 1, 1, 1, 1] [2021-02-21 16:07:58,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-02-21 16:07:58,316 INFO L428 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:07:58,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:07:58,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1554722790, now seen corresponding path program 1 times [2021-02-21 16:07:58,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:07:58,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965671503] [2021-02-21 16:07:58,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:07:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:58,332 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:58,333 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:58,334 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:58,335 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:07:58,337 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:58,338 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:58,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:07:58,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:07:58,358 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:07:58,359 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:07:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:07:58,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965671503] [2021-02-21 16:07:58,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:07:58,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:07:58,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473147381] [2021-02-21 16:07:58,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:07:58,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:07:58,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:07:58,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:07:58,362 INFO L87 Difference]: Start difference. First operand 14601 states and 16135 transitions. Second operand 4 states. [2021-02-21 16:07:58,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:07:58,632 INFO L93 Difference]: Finished difference Result 14601 states and 16135 transitions. [2021-02-21 16:07:58,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:07:58,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2021-02-21 16:07:58,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:07:58,633 INFO L225 Difference]: With dead ends: 14601 [2021-02-21 16:07:58,633 INFO L226 Difference]: Without dead ends: 0 [2021-02-21 16:07:58,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:07:58,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-21 16:07:58,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-21 16:07:58,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-21 16:07:58,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-21 16:07:58,654 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2021-02-21 16:07:58,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:07:58,655 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-21 16:07:58,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:07:58,655 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-21 16:07:58,655 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-21 16:07:58,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-02-21 16:07:58,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-21 16:08:18,425 WARN L202 SmtUtils]: Spent 19.73 s on a formula simplification. DAG size of input: 2637 DAG size of output: 32 [2021-02-21 16:08:18,450 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-21 16:08:18,450 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-21 16:08:18,450 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-21 16:08:18,450 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-21 16:08:18,451 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-21 16:08:18,451 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-21 16:08:18,451 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-21 16:08:18,451 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 16:08:18,451 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-21 16:08:18,451 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-21 16:08:18,451 INFO L189 CegarLoopUtils]: For program point L126(line 126) no Hoare annotation was computed. [2021-02-21 16:08:18,451 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 6 165) no Hoare annotation was computed. [2021-02-21 16:08:18,451 INFO L189 CegarLoopUtils]: For program point L151(line 151) no Hoare annotation was computed. [2021-02-21 16:08:18,451 INFO L189 CegarLoopUtils]: For program point L110-1(lines 41 160) no Hoare annotation was computed. [2021-02-21 16:08:18,452 INFO L189 CegarLoopUtils]: For program point L135-1(lines 41 160) no Hoare annotation was computed. [2021-02-21 16:08:18,452 INFO L189 CegarLoopUtils]: For program point L111(line 111) no Hoare annotation was computed. [2021-02-21 16:08:18,452 INFO L189 CegarLoopUtils]: For program point L136(line 136) no Hoare annotation was computed. [2021-02-21 16:08:18,452 INFO L192 CegarLoopUtils]: At program point L161(lines 7 165) the Hoare annotation is: true [2021-02-21 16:08:18,452 INFO L189 CegarLoopUtils]: For program point L120-1(lines 41 160) no Hoare annotation was computed. [2021-02-21 16:08:18,452 INFO L189 CegarLoopUtils]: For program point L145-1(lines 41 160) no Hoare annotation was computed. [2021-02-21 16:08:18,452 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 6 165) no Hoare annotation was computed. [2021-02-21 16:08:18,452 INFO L189 CegarLoopUtils]: For program point L104-1(lines 41 160) no Hoare annotation was computed. [2021-02-21 16:08:18,452 INFO L189 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 163) no Hoare annotation was computed. [2021-02-21 16:08:18,453 INFO L189 CegarLoopUtils]: For program point L96-1(lines 41 160) no Hoare annotation was computed. [2021-02-21 16:08:18,453 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 6 165) the Hoare annotation is: true [2021-02-21 16:08:18,453 INFO L189 CegarLoopUtils]: For program point L121(line 121) no Hoare annotation was computed. [2021-02-21 16:08:18,453 INFO L189 CegarLoopUtils]: For program point L88-1(lines 41 160) no Hoare annotation was computed. [2021-02-21 16:08:18,453 INFO L189 CegarLoopUtils]: For program point L146(line 146) no Hoare annotation was computed. [2021-02-21 16:08:18,453 INFO L189 CegarLoopUtils]: For program point L80-1(lines 41 160) no Hoare annotation was computed. [2021-02-21 16:08:18,453 INFO L189 CegarLoopUtils]: For program point L72-1(lines 41 160) no Hoare annotation was computed. [2021-02-21 16:08:18,453 INFO L189 CegarLoopUtils]: For program point L130-1(lines 41 160) no Hoare annotation was computed. [2021-02-21 16:08:18,453 INFO L192 CegarLoopUtils]: At program point L155-1(lines 41 160) the Hoare annotation is: true [2021-02-21 16:08:18,453 INFO L189 CegarLoopUtils]: For program point L131(line 131) no Hoare annotation was computed. [2021-02-21 16:08:18,454 INFO L189 CegarLoopUtils]: For program point L156(line 156) no Hoare annotation was computed. [2021-02-21 16:08:18,454 INFO L185 CegarLoopUtils]: At program point L156-1(lines 7 165) the Hoare annotation is: false [2021-02-21 16:08:18,454 INFO L189 CegarLoopUtils]: For program point L115-1(lines 41 160) no Hoare annotation was computed. [2021-02-21 16:08:18,454 INFO L189 CegarLoopUtils]: For program point L140-1(lines 41 160) no Hoare annotation was computed. [2021-02-21 16:08:18,454 INFO L189 CegarLoopUtils]: For program point L116(line 116) no Hoare annotation was computed. [2021-02-21 16:08:18,454 INFO L189 CegarLoopUtils]: For program point L141(line 141) no Hoare annotation was computed. [2021-02-21 16:08:18,454 INFO L189 CegarLoopUtils]: For program point L100-1(lines 41 160) no Hoare annotation was computed. [2021-02-21 16:08:18,454 INFO L189 CegarLoopUtils]: For program point L125-1(lines 41 160) no Hoare annotation was computed. [2021-02-21 16:08:18,454 INFO L189 CegarLoopUtils]: For program point L92-1(lines 41 160) no Hoare annotation was computed. [2021-02-21 16:08:18,454 INFO L189 CegarLoopUtils]: For program point L150-1(lines 41 160) no Hoare annotation was computed. [2021-02-21 16:08:18,454 INFO L189 CegarLoopUtils]: For program point L84-1(lines 41 160) no Hoare annotation was computed. [2021-02-21 16:08:18,454 INFO L189 CegarLoopUtils]: For program point L43(lines 43 45) no Hoare annotation was computed. [2021-02-21 16:08:18,455 INFO L189 CegarLoopUtils]: For program point L76-1(lines 41 160) no Hoare annotation was computed. [2021-02-21 16:08:18,455 INFO L189 CegarLoopUtils]: For program point L68(lines 68 70) no Hoare annotation was computed. [2021-02-21 16:08:18,455 INFO L189 CegarLoopUtils]: For program point L68-2(lines 41 160) no Hoare annotation was computed. [2021-02-21 16:08:18,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 04:08:18 BoogieIcfgContainer [2021-02-21 16:08:18,466 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 16:08:18,467 INFO L168 Benchmark]: Toolchain (without parser) took 34989.44 ms. Allocated memory was 168.8 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 144.7 MB in the beginning and 999.8 MB in the end (delta: -855.1 MB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. [2021-02-21 16:08:18,468 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 168.8 MB. Free memory is still 139.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:08:18,468 INFO L168 Benchmark]: CACSL2BoogieTranslator took 485.04 ms. Allocated memory is still 168.8 MB. Free memory was 143.6 MB in the beginning and 133.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 16:08:18,468 INFO L168 Benchmark]: Boogie Preprocessor took 46.04 ms. Allocated memory is still 168.8 MB. Free memory was 133.3 MB in the beginning and 131.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 16:08:18,468 INFO L168 Benchmark]: RCFGBuilder took 589.59 ms. Allocated memory is still 168.8 MB. Free memory was 131.6 MB in the beginning and 148.5 MB in the end (delta: -16.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 8.0 GB. [2021-02-21 16:08:18,469 INFO L168 Benchmark]: TraceAbstraction took 33845.96 ms. Allocated memory was 168.8 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 148.0 MB in the beginning and 999.8 MB in the end (delta: -851.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. [2021-02-21 16:08:18,470 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 168.8 MB. Free memory is still 139.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 485.04 ms. Allocated memory is still 168.8 MB. Free memory was 143.6 MB in the beginning and 133.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.04 ms. Allocated memory is still 168.8 MB. Free memory was 133.3 MB in the beginning and 131.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 589.59 ms. Allocated memory is still 168.8 MB. Free memory was 131.6 MB in the beginning and 148.5 MB in the end (delta: -16.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 33845.96 ms. Allocated memory was 168.8 MB in the beginning and 2.0 GB in the end (delta: 1.8 GB). Free memory was 148.0 MB in the beginning and 999.8 MB in the end (delta: -851.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 163]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.9s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 7.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 19.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2358 SDtfs, 3551 SDslu, 172 SDs, 0 SdLazy, 1707 SolverSat, 66 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 195 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14601occurred in iteration=26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.8s AutomataMinimizationTime, 28 MinimizatonAttempts, 3100 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 37 HoareAnnotationTreeSize, 7 FomulaSimplifications, 27454566 FormulaSimplificationTreeSizeReduction, 19.7s HoareSimplificationTime, 7 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 721 NumberOfCodeBlocks, 721 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 693 ConstructedInterpolants, 0 QuantifiedInterpolants, 54541 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...