/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_7.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:08:25,461 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:08:25,466 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:08:25,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 16:08:25,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 16:08:25,537 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 16:08:25,541 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 16:08:25,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 16:08:25,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 16:08:25,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 16:08:25,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 16:08:25,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 16:08:25,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:08:25,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:08:25,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:08:25,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:08:25,576 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:08:25,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:08:25,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:08:25,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:08:25,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:08:25,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:08:25,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:08:25,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:08:25,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 16:08:25,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:08:25,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:08:25,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:08:25,641 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 16:08:25,699 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:08:25,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:08:25,703 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:08:25,704 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:08:25,704 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:08:25,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:08:25,704 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:08:25,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:08:25,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:08:25,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:08:25,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:08:25,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:08:25,707 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:08:25,707 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:08:25,707 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:08:25,707 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:08:25,708 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:08:25,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:08:25,708 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:08:25,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:08:25,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:08:25,709 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:08:25,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:08:25,710 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:08:25,710 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:08:25,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:08:25,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:08:25,710 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:08:25,710 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:08:26,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:08:26,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:08:26,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:08:26,162 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:08:26,162 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:08:26,163 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2021-02-21 16:08:26,250 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee80ae06a/65c3f10d8e824918bc577413d034520f/FLAG91cd44936 [2021-02-21 16:08:26,834 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:08:26,835 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_7.c [2021-02-21 16:08:26,844 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee80ae06a/65c3f10d8e824918bc577413d034520f/FLAG91cd44936 [2021-02-21 16:08:27,161 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee80ae06a/65c3f10d8e824918bc577413d034520f [2021-02-21 16:08:27,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:08:27,177 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:08:27,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:08:27,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:08:27,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:08:27,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:08:27" (1/1) ... [2021-02-21 16:08:27,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1009fc65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:27, skipping insertion in model container [2021-02-21 16:08:27,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:08:27" (1/1) ... [2021-02-21 16:08:27,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:08:27,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:08:27,440 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_7.c[2881,2894] [2021-02-21 16:08:27,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:08:27,464 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:08:27,521 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_7.c[2881,2894] [2021-02-21 16:08:27,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:08:27,551 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:08:27,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:27 WrapperNode [2021-02-21 16:08:27,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:08:27,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:08:27,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:08:27,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:08:27,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:27" (1/1) ... [2021-02-21 16:08:27,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:27" (1/1) ... [2021-02-21 16:08:27,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:27" (1/1) ... [2021-02-21 16:08:27,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:27" (1/1) ... [2021-02-21 16:08:27,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:27" (1/1) ... [2021-02-21 16:08:27,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:27" (1/1) ... [2021-02-21 16:08:27,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:27" (1/1) ... [2021-02-21 16:08:27,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:08:27,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:08:27,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:08:27,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:08:27,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:27" (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 16:08:27,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:08:27,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:08:27,794 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:08:27,794 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:08:27,794 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:08:27,795 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:08:27,795 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:08:27,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:08:27,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 16:08:27,797 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:08:27,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:08:27,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:08:27,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:08:27,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:08:27,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:08:27,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:08:28,518 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:08:28,519 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 16:08:28,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:08:28 BoogieIcfgContainer [2021-02-21 16:08:28,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:08:28,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:08:28,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:08:28,527 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:08:28,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:08:27" (1/3) ... [2021-02-21 16:08:28,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72ac8702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:08:28, skipping insertion in model container [2021-02-21 16:08:28,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:27" (2/3) ... [2021-02-21 16:08:28,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72ac8702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:08:28, skipping insertion in model container [2021-02-21 16:08:28,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:08:28" (3/3) ... [2021-02-21 16:08:28,537 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2021-02-21 16:08:28,544 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:08:28,550 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:08:28,577 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:08:28,609 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:08:28,610 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:08:28,610 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:08:28,610 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:08:28,610 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:08:28,611 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:08:28,611 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:08:28,611 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:08:28,631 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2021-02-21 16:08:28,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-21 16:08:28,638 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:28,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:28,640 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:28,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:28,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1576798563, now seen corresponding path program 1 times [2021-02-21 16:08:28,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:28,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515089557] [2021-02-21 16:08:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:28,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:28,893 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:28,895 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:28,896 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:28,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:28,918 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:28,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:29,009 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:29,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:29,017 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 16:08:29,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515089557] [2021-02-21 16:08:29,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:29,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:29,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739949550] [2021-02-21 16:08:29,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:29,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:29,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:29,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:29,050 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2021-02-21 16:08:29,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:29,509 INFO L93 Difference]: Finished difference Result 70 states and 115 transitions. [2021-02-21 16:08:29,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:29,512 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-02-21 16:08:29,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:29,525 INFO L225 Difference]: With dead ends: 70 [2021-02-21 16:08:29,525 INFO L226 Difference]: Without dead ends: 55 [2021-02-21 16:08:29,529 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 16:08:29,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-02-21 16:08:29,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2021-02-21 16:08:29,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-02-21 16:08:29,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 66 transitions. [2021-02-21 16:08:29,580 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 66 transitions. Word has length 18 [2021-02-21 16:08:29,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:29,581 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 66 transitions. [2021-02-21 16:08:29,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:29,581 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 66 transitions. [2021-02-21 16:08:29,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-21 16:08:29,582 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:29,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:29,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:08:29,583 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:29,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:29,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1969825573, now seen corresponding path program 1 times [2021-02-21 16:08:29,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:29,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839755950] [2021-02-21 16:08:29,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:29,654 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:29,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:29,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:29,658 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:29,663 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:29,663 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:29,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:29,711 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:29,712 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:29,714 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 16:08:29,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839755950] [2021-02-21 16:08:29,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:29,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:29,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662575298] [2021-02-21 16:08:29,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:29,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:29,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:29,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:29,719 INFO L87 Difference]: Start difference. First operand 39 states and 66 transitions. Second operand 4 states. [2021-02-21 16:08:29,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:29,925 INFO L93 Difference]: Finished difference Result 88 states and 153 transitions. [2021-02-21 16:08:29,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:29,926 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-02-21 16:08:29,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:29,928 INFO L225 Difference]: With dead ends: 88 [2021-02-21 16:08:29,928 INFO L226 Difference]: Without dead ends: 55 [2021-02-21 16:08:29,930 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 16:08:29,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-02-21 16:08:29,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-02-21 16:08:29,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-02-21 16:08:29,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 90 transitions. [2021-02-21 16:08:29,943 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 90 transitions. Word has length 18 [2021-02-21 16:08:29,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:29,943 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 90 transitions. [2021-02-21 16:08:29,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:29,944 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 90 transitions. [2021-02-21 16:08:29,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-21 16:08:29,945 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:29,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:29,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:08:29,946 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:29,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:29,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1635900842, now seen corresponding path program 1 times [2021-02-21 16:08:29,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:29,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225437438] [2021-02-21 16:08:29,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:29,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:29,996 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:29,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:29,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:30,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:30,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:30,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:30,075 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:30,078 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:30,081 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 16:08:30,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225437438] [2021-02-21 16:08:30,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:30,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:30,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230658600] [2021-02-21 16:08:30,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:30,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:30,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:30,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:30,089 INFO L87 Difference]: Start difference. First operand 53 states and 90 transitions. Second operand 4 states. [2021-02-21 16:08:30,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:30,301 INFO L93 Difference]: Finished difference Result 82 states and 136 transitions. [2021-02-21 16:08:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:30,301 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-21 16:08:30,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:30,303 INFO L225 Difference]: With dead ends: 82 [2021-02-21 16:08:30,303 INFO L226 Difference]: Without dead ends: 58 [2021-02-21 16:08:30,304 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 16:08:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-02-21 16:08:30,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-02-21 16:08:30,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-02-21 16:08:30,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 92 transitions. [2021-02-21 16:08:30,317 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 92 transitions. Word has length 19 [2021-02-21 16:08:30,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:30,318 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 92 transitions. [2021-02-21 16:08:30,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:30,318 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 92 transitions. [2021-02-21 16:08:30,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-21 16:08:30,319 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:30,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:30,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 16:08:30,320 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:30,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:30,321 INFO L82 PathProgramCache]: Analyzing trace with hash -934836264, now seen corresponding path program 1 times [2021-02-21 16:08:30,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:30,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225841087] [2021-02-21 16:08:30,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:30,375 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:30,377 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:30,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:30,382 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:30,387 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:30,388 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:30,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:30,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:30,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:30,431 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 16:08:30,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225841087] [2021-02-21 16:08:30,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:30,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:30,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044020631] [2021-02-21 16:08:30,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:30,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:30,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:30,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:30,434 INFO L87 Difference]: Start difference. First operand 56 states and 92 transitions. Second operand 4 states. [2021-02-21 16:08:30,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:30,586 INFO L93 Difference]: Finished difference Result 148 states and 252 transitions. [2021-02-21 16:08:30,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:30,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-21 16:08:30,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:30,588 INFO L225 Difference]: With dead ends: 148 [2021-02-21 16:08:30,589 INFO L226 Difference]: Without dead ends: 101 [2021-02-21 16:08:30,590 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 16:08:30,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-02-21 16:08:30,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2021-02-21 16:08:30,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-02-21 16:08:30,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 165 transitions. [2021-02-21 16:08:30,608 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 165 transitions. Word has length 19 [2021-02-21 16:08:30,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:30,609 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 165 transitions. [2021-02-21 16:08:30,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:30,609 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 165 transitions. [2021-02-21 16:08:30,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-21 16:08:30,611 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:30,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:30,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 16:08:30,612 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:30,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:30,613 INFO L82 PathProgramCache]: Analyzing trace with hash -541809254, now seen corresponding path program 1 times [2021-02-21 16:08:30,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:30,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130980657] [2021-02-21 16:08:30,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:30,671 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:30,672 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:30,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:30,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:30,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:30,684 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:30,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:30,747 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:30,750 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:30,752 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 16:08:30,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130980657] [2021-02-21 16:08:30,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:30,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:30,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589602385] [2021-02-21 16:08:30,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:30,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:30,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:30,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:30,761 INFO L87 Difference]: Start difference. First operand 99 states and 165 transitions. Second operand 4 states. [2021-02-21 16:08:30,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:30,929 INFO L93 Difference]: Finished difference Result 127 states and 211 transitions. [2021-02-21 16:08:30,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:30,934 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-21 16:08:30,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:30,940 INFO L225 Difference]: With dead ends: 127 [2021-02-21 16:08:30,940 INFO L226 Difference]: Without dead ends: 125 [2021-02-21 16:08:30,941 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 16:08:30,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-02-21 16:08:30,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 99. [2021-02-21 16:08:30,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-02-21 16:08:30,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 163 transitions. [2021-02-21 16:08:30,979 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 163 transitions. Word has length 19 [2021-02-21 16:08:30,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:30,980 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 163 transitions. [2021-02-21 16:08:30,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:30,980 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 163 transitions. [2021-02-21 16:08:30,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-21 16:08:30,984 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:30,984 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] [2021-02-21 16:08:30,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 16:08:30,985 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:30,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:30,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1085061584, now seen corresponding path program 1 times [2021-02-21 16:08:30,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:30,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334299255] [2021-02-21 16:08:30,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:31,050 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:31,053 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:31,059 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:31,060 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:31,067 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:31,069 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:31,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:31,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:31,105 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:31,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:31,107 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 16:08:31,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334299255] [2021-02-21 16:08:31,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:31,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:31,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242896651] [2021-02-21 16:08:31,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:31,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:31,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:31,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:31,110 INFO L87 Difference]: Start difference. First operand 99 states and 163 transitions. Second operand 4 states. [2021-02-21 16:08:31,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:31,240 INFO L93 Difference]: Finished difference Result 179 states and 299 transitions. [2021-02-21 16:08:31,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:31,241 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-21 16:08:31,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:31,243 INFO L225 Difference]: With dead ends: 179 [2021-02-21 16:08:31,243 INFO L226 Difference]: Without dead ends: 177 [2021-02-21 16:08:31,244 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 16:08:31,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-02-21 16:08:31,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2021-02-21 16:08:31,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2021-02-21 16:08:31,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 221 transitions. [2021-02-21 16:08:31,286 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 221 transitions. Word has length 20 [2021-02-21 16:08:31,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:31,286 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 221 transitions. [2021-02-21 16:08:31,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:31,286 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 221 transitions. [2021-02-21 16:08:31,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-21 16:08:31,288 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:31,288 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] [2021-02-21 16:08:31,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 16:08:31,289 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:31,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:31,289 INFO L82 PathProgramCache]: Analyzing trace with hash 692034574, now seen corresponding path program 1 times [2021-02-21 16:08:31,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:31,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672546257] [2021-02-21 16:08:31,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:31,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:31,316 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:31,316 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:31,317 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:31,318 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:31,321 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:31,322 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:31,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:31,353 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:31,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:31,355 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 16:08:31,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672546257] [2021-02-21 16:08:31,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:31,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:31,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723755887] [2021-02-21 16:08:31,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:31,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:31,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:31,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:31,358 INFO L87 Difference]: Start difference. First operand 135 states and 221 transitions. Second operand 4 states. [2021-02-21 16:08:31,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:31,486 INFO L93 Difference]: Finished difference Result 311 states and 515 transitions. [2021-02-21 16:08:31,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:31,487 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-21 16:08:31,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:31,489 INFO L225 Difference]: With dead ends: 311 [2021-02-21 16:08:31,489 INFO L226 Difference]: Without dead ends: 185 [2021-02-21 16:08:31,490 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 16:08:31,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-02-21 16:08:31,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2021-02-21 16:08:31,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2021-02-21 16:08:31,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 295 transitions. [2021-02-21 16:08:31,506 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 295 transitions. Word has length 20 [2021-02-21 16:08:31,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:31,507 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 295 transitions. [2021-02-21 16:08:31,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:31,507 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 295 transitions. [2021-02-21 16:08:31,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-21 16:08:31,509 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:31,509 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 16:08:31,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 16:08:31,510 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:31,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:31,510 INFO L82 PathProgramCache]: Analyzing trace with hash -722614227, now seen corresponding path program 1 times [2021-02-21 16:08:31,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:31,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571935594] [2021-02-21 16:08:31,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:31,546 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:31,547 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:31,548 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:31,548 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:31,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:31,553 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:31,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:31,600 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:31,601 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:31,602 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 16:08:31,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571935594] [2021-02-21 16:08:31,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:31,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:31,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941676503] [2021-02-21 16:08:31,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:31,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:31,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:31,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:31,609 INFO L87 Difference]: Start difference. First operand 183 states and 295 transitions. Second operand 4 states. [2021-02-21 16:08:31,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:31,753 INFO L93 Difference]: Finished difference Result 277 states and 445 transitions. [2021-02-21 16:08:31,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:31,753 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-21 16:08:31,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:31,755 INFO L225 Difference]: With dead ends: 277 [2021-02-21 16:08:31,755 INFO L226 Difference]: Without dead ends: 191 [2021-02-21 16:08:31,756 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 16:08:31,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-02-21 16:08:31,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2021-02-21 16:08:31,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2021-02-21 16:08:31,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 299 transitions. [2021-02-21 16:08:31,768 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 299 transitions. Word has length 21 [2021-02-21 16:08:31,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:31,769 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 299 transitions. [2021-02-21 16:08:31,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:31,769 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 299 transitions. [2021-02-21 16:08:31,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-21 16:08:31,771 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:31,771 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 16:08:31,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 16:08:31,771 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:31,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:31,772 INFO L82 PathProgramCache]: Analyzing trace with hash -21549649, now seen corresponding path program 1 times [2021-02-21 16:08:31,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:31,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388746159] [2021-02-21 16:08:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:31,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:31,793 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:31,793 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:31,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:31,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:31,798 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:31,798 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:31,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:31,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:31,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:31,828 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 16:08:31,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388746159] [2021-02-21 16:08:31,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:31,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:31,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385472027] [2021-02-21 16:08:31,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:31,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:31,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:31,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:31,830 INFO L87 Difference]: Start difference. First operand 189 states and 299 transitions. Second operand 4 states. [2021-02-21 16:08:31,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:31,952 INFO L93 Difference]: Finished difference Result 333 states and 533 transitions. [2021-02-21 16:08:31,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:31,953 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-21 16:08:31,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:31,955 INFO L225 Difference]: With dead ends: 333 [2021-02-21 16:08:31,956 INFO L226 Difference]: Without dead ends: 331 [2021-02-21 16:08:31,956 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 16:08:31,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-02-21 16:08:31,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 265. [2021-02-21 16:08:31,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2021-02-21 16:08:31,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 411 transitions. [2021-02-21 16:08:31,971 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 411 transitions. Word has length 21 [2021-02-21 16:08:31,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:31,971 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 411 transitions. [2021-02-21 16:08:31,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:31,971 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 411 transitions. [2021-02-21 16:08:31,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-21 16:08:31,973 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:31,973 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 16:08:31,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 16:08:31,974 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:31,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:31,974 INFO L82 PathProgramCache]: Analyzing trace with hash -414576659, now seen corresponding path program 1 times [2021-02-21 16:08:31,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:31,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783781877] [2021-02-21 16:08:31,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:31,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:31,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:31,998 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:31,999 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:32,002 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:32,003 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:32,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:32,034 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:32,036 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:32,037 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 16:08:32,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783781877] [2021-02-21 16:08:32,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:32,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:32,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219786698] [2021-02-21 16:08:32,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:32,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:32,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:32,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:32,040 INFO L87 Difference]: Start difference. First operand 265 states and 411 transitions. Second operand 4 states. [2021-02-21 16:08:32,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:32,169 INFO L93 Difference]: Finished difference Result 605 states and 941 transitions. [2021-02-21 16:08:32,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:32,170 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-21 16:08:32,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:32,172 INFO L225 Difference]: With dead ends: 605 [2021-02-21 16:08:32,172 INFO L226 Difference]: Without dead ends: 355 [2021-02-21 16:08:32,174 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 16:08:32,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-02-21 16:08:32,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 353. [2021-02-21 16:08:32,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2021-02-21 16:08:32,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 535 transitions. [2021-02-21 16:08:32,192 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 535 transitions. Word has length 21 [2021-02-21 16:08:32,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:32,192 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 535 transitions. [2021-02-21 16:08:32,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:32,193 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 535 transitions. [2021-02-21 16:08:32,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-21 16:08:32,194 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:32,194 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 16:08:32,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 16:08:32,195 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:32,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:32,195 INFO L82 PathProgramCache]: Analyzing trace with hash -667823741, now seen corresponding path program 1 times [2021-02-21 16:08:32,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:32,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621064843] [2021-02-21 16:08:32,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:32,215 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:32,216 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:32,216 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:32,217 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:32,222 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:32,223 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:32,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:32,258 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:32,258 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:32,261 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 16:08:32,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621064843] [2021-02-21 16:08:32,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:32,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:32,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744344042] [2021-02-21 16:08:32,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:32,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:32,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:32,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:32,263 INFO L87 Difference]: Start difference. First operand 353 states and 535 transitions. Second operand 4 states. [2021-02-21 16:08:32,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:32,396 INFO L93 Difference]: Finished difference Result 529 states and 797 transitions. [2021-02-21 16:08:32,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:32,396 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-21 16:08:32,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:32,398 INFO L225 Difference]: With dead ends: 529 [2021-02-21 16:08:32,399 INFO L226 Difference]: Without dead ends: 363 [2021-02-21 16:08:32,400 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 16:08:32,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-02-21 16:08:32,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 361. [2021-02-21 16:08:32,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2021-02-21 16:08:32,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 535 transitions. [2021-02-21 16:08:32,417 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 535 transitions. Word has length 22 [2021-02-21 16:08:32,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:32,417 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 535 transitions. [2021-02-21 16:08:32,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:32,418 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 535 transitions. [2021-02-21 16:08:32,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-21 16:08:32,419 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:32,419 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 16:08:32,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-21 16:08:32,419 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:32,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:32,420 INFO L82 PathProgramCache]: Analyzing trace with hash 33240837, now seen corresponding path program 1 times [2021-02-21 16:08:32,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:32,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213610268] [2021-02-21 16:08:32,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:32,439 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:32,440 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:32,440 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:32,441 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:32,444 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:32,445 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:32,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:32,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:32,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:32,473 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:32,474 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 16:08:32,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213610268] [2021-02-21 16:08:32,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:32,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:32,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672118794] [2021-02-21 16:08:32,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:32,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:32,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:32,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:32,477 INFO L87 Difference]: Start difference. First operand 361 states and 535 transitions. Second operand 4 states. [2021-02-21 16:08:32,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:32,611 INFO L93 Difference]: Finished difference Result 621 states and 929 transitions. [2021-02-21 16:08:32,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:32,611 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-21 16:08:32,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:32,617 INFO L225 Difference]: With dead ends: 621 [2021-02-21 16:08:32,618 INFO L226 Difference]: Without dead ends: 619 [2021-02-21 16:08:32,618 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 16:08:32,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-02-21 16:08:32,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 521. [2021-02-21 16:08:32,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2021-02-21 16:08:32,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 751 transitions. [2021-02-21 16:08:32,653 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 751 transitions. Word has length 22 [2021-02-21 16:08:32,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:32,653 INFO L480 AbstractCegarLoop]: Abstraction has 521 states and 751 transitions. [2021-02-21 16:08:32,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:32,653 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 751 transitions. [2021-02-21 16:08:32,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-21 16:08:32,656 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:32,656 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 16:08:32,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-21 16:08:32,657 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:32,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:32,658 INFO L82 PathProgramCache]: Analyzing trace with hash -359786173, now seen corresponding path program 1 times [2021-02-21 16:08:32,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:32,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603135538] [2021-02-21 16:08:32,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:32,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:32,689 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:32,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:32,690 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:32,691 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:32,694 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:32,695 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:32,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:32,733 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:32,734 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:32,735 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 16:08:32,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603135538] [2021-02-21 16:08:32,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:32,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:32,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537888250] [2021-02-21 16:08:32,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:32,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:32,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:32,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:32,740 INFO L87 Difference]: Start difference. First operand 521 states and 751 transitions. Second operand 4 states. [2021-02-21 16:08:32,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:32,891 INFO L93 Difference]: Finished difference Result 1181 states and 1697 transitions. [2021-02-21 16:08:32,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:32,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-21 16:08:32,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:32,896 INFO L225 Difference]: With dead ends: 1181 [2021-02-21 16:08:32,897 INFO L226 Difference]: Without dead ends: 683 [2021-02-21 16:08:32,904 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 16:08:32,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-02-21 16:08:32,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 681. [2021-02-21 16:08:32,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 681 states. [2021-02-21 16:08:32,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 951 transitions. [2021-02-21 16:08:32,938 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 951 transitions. Word has length 22 [2021-02-21 16:08:32,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:32,938 INFO L480 AbstractCegarLoop]: Abstraction has 681 states and 951 transitions. [2021-02-21 16:08:32,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:32,938 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 951 transitions. [2021-02-21 16:08:32,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-21 16:08:32,940 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:32,941 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 16:08:32,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-21 16:08:32,941 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:32,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:32,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1030681666, now seen corresponding path program 1 times [2021-02-21 16:08:32,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:32,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088241384] [2021-02-21 16:08:32,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:32,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:32,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:32,980 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:32,981 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:32,984 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:32,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:33,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:33,022 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:33,022 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:33,023 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 16:08:33,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088241384] [2021-02-21 16:08:33,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:33,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:33,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29423805] [2021-02-21 16:08:33,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:33,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:33,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:33,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:33,026 INFO L87 Difference]: Start difference. First operand 681 states and 951 transitions. Second operand 4 states. [2021-02-21 16:08:33,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:33,153 INFO L93 Difference]: Finished difference Result 1021 states and 1417 transitions. [2021-02-21 16:08:33,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:33,154 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-21 16:08:33,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:33,158 INFO L225 Difference]: With dead ends: 1021 [2021-02-21 16:08:33,158 INFO L226 Difference]: Without dead ends: 699 [2021-02-21 16:08:33,159 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 16:08:33,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-02-21 16:08:33,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 697. [2021-02-21 16:08:33,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2021-02-21 16:08:33,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 951 transitions. [2021-02-21 16:08:33,190 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 951 transitions. Word has length 23 [2021-02-21 16:08:33,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:33,191 INFO L480 AbstractCegarLoop]: Abstraction has 697 states and 951 transitions. [2021-02-21 16:08:33,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:33,191 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 951 transitions. [2021-02-21 16:08:33,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-21 16:08:33,192 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:33,192 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 16:08:33,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-21 16:08:33,193 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:33,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:33,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1731746244, now seen corresponding path program 1 times [2021-02-21 16:08:33,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:33,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47738993] [2021-02-21 16:08:33,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:33,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:33,212 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:33,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:33,214 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:33,214 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:33,217 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:33,218 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:33,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:33,247 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:33,248 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:33,249 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 16:08:33,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47738993] [2021-02-21 16:08:33,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:33,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:33,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030763974] [2021-02-21 16:08:33,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:33,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:33,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:33,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:33,252 INFO L87 Difference]: Start difference. First operand 697 states and 951 transitions. Second operand 4 states. [2021-02-21 16:08:33,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:33,402 INFO L93 Difference]: Finished difference Result 1165 states and 1593 transitions. [2021-02-21 16:08:33,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:33,403 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-21 16:08:33,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:33,409 INFO L225 Difference]: With dead ends: 1165 [2021-02-21 16:08:33,410 INFO L226 Difference]: Without dead ends: 1163 [2021-02-21 16:08:33,411 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 16:08:33,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-02-21 16:08:33,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1033. [2021-02-21 16:08:33,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1033 states. [2021-02-21 16:08:33,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1367 transitions. [2021-02-21 16:08:33,490 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1367 transitions. Word has length 23 [2021-02-21 16:08:33,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:33,491 INFO L480 AbstractCegarLoop]: Abstraction has 1033 states and 1367 transitions. [2021-02-21 16:08:33,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:33,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1367 transitions. [2021-02-21 16:08:33,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-21 16:08:33,494 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:33,494 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 16:08:33,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-21 16:08:33,495 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:33,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:33,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1338719234, now seen corresponding path program 1 times [2021-02-21 16:08:33,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:33,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452152502] [2021-02-21 16:08:33,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:33,530 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:33,531 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:33,532 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:33,533 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:33,537 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:33,538 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:33,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:33,573 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:33,574 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:33,576 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 16:08:33,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452152502] [2021-02-21 16:08:33,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:33,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:33,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816744124] [2021-02-21 16:08:33,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:33,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:33,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:33,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:33,578 INFO L87 Difference]: Start difference. First operand 1033 states and 1367 transitions. Second operand 4 states. [2021-02-21 16:08:33,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:33,756 INFO L93 Difference]: Finished difference Result 2317 states and 3033 transitions. [2021-02-21 16:08:33,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:33,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-21 16:08:33,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:33,764 INFO L225 Difference]: With dead ends: 2317 [2021-02-21 16:08:33,764 INFO L226 Difference]: Without dead ends: 1323 [2021-02-21 16:08:33,767 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 16:08:33,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2021-02-21 16:08:33,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1321. [2021-02-21 16:08:33,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1321 states. [2021-02-21 16:08:33,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1671 transitions. [2021-02-21 16:08:33,833 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1671 transitions. Word has length 23 [2021-02-21 16:08:33,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:33,833 INFO L480 AbstractCegarLoop]: Abstraction has 1321 states and 1671 transitions. [2021-02-21 16:08:33,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:33,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1671 transitions. [2021-02-21 16:08:33,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-21 16:08:33,836 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:33,837 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 16:08:33,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-21 16:08:33,837 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:33,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:33,838 INFO L82 PathProgramCache]: Analyzing trace with hash 2144742072, now seen corresponding path program 1 times [2021-02-21 16:08:33,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:33,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098210321] [2021-02-21 16:08:33,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:33,856 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:33,856 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:33,857 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:33,858 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:33,861 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:33,862 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:33,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:33,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:33,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:33,893 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 16:08:33,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098210321] [2021-02-21 16:08:33,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:33,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:33,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685695818] [2021-02-21 16:08:33,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:33,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:33,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:33,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:33,896 INFO L87 Difference]: Start difference. First operand 1321 states and 1671 transitions. Second operand 4 states. [2021-02-21 16:08:34,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:34,048 INFO L93 Difference]: Finished difference Result 1981 states and 2489 transitions. [2021-02-21 16:08:34,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:34,048 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-21 16:08:34,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:34,055 INFO L225 Difference]: With dead ends: 1981 [2021-02-21 16:08:34,055 INFO L226 Difference]: Without dead ends: 1355 [2021-02-21 16:08:34,058 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 16:08:34,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-02-21 16:08:34,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1353. [2021-02-21 16:08:34,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1353 states. [2021-02-21 16:08:34,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 1671 transitions. [2021-02-21 16:08:34,121 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 1671 transitions. Word has length 24 [2021-02-21 16:08:34,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:34,122 INFO L480 AbstractCegarLoop]: Abstraction has 1353 states and 1671 transitions. [2021-02-21 16:08:34,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:34,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 1671 transitions. [2021-02-21 16:08:34,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-21 16:08:34,125 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:34,125 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 16:08:34,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-21 16:08:34,127 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:34,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:34,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1449160646, now seen corresponding path program 1 times [2021-02-21 16:08:34,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:34,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660402376] [2021-02-21 16:08:34,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:34,154 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:34,155 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:34,156 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:34,157 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:34,160 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:34,161 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:34,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:34,190 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:34,191 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:34,220 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 16:08:34,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660402376] [2021-02-21 16:08:34,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:34,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:34,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762762961] [2021-02-21 16:08:34,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:34,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:34,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:34,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:34,222 INFO L87 Difference]: Start difference. First operand 1353 states and 1671 transitions. Second operand 4 states. [2021-02-21 16:08:34,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:34,382 INFO L93 Difference]: Finished difference Result 2187 states and 2664 transitions. [2021-02-21 16:08:34,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:34,383 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-21 16:08:34,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:34,393 INFO L225 Difference]: With dead ends: 2187 [2021-02-21 16:08:34,394 INFO L226 Difference]: Without dead ends: 2185 [2021-02-21 16:08:34,395 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 16:08:34,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2021-02-21 16:08:34,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 2057. [2021-02-21 16:08:34,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2057 states. [2021-02-21 16:08:34,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 2471 transitions. [2021-02-21 16:08:34,477 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 2471 transitions. Word has length 24 [2021-02-21 16:08:34,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:34,477 INFO L480 AbstractCegarLoop]: Abstraction has 2057 states and 2471 transitions. [2021-02-21 16:08:34,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:34,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 2471 transitions. [2021-02-21 16:08:34,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-21 16:08:34,482 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:34,482 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 16:08:34,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-02-21 16:08:34,482 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:34,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:34,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1842187656, now seen corresponding path program 1 times [2021-02-21 16:08:34,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:34,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187906561] [2021-02-21 16:08:34,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:34,499 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:34,499 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:34,502 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:34,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:34,506 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:34,507 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:34,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:34,536 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:34,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:34,538 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 16:08:34,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187906561] [2021-02-21 16:08:34,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:34,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:34,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19437898] [2021-02-21 16:08:34,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:34,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:34,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:34,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:34,540 INFO L87 Difference]: Start difference. First operand 2057 states and 2471 transitions. Second operand 4 states. [2021-02-21 16:08:34,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:34,714 INFO L93 Difference]: Finished difference Result 4553 states and 5351 transitions. [2021-02-21 16:08:34,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:34,714 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-21 16:08:34,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:34,715 INFO L225 Difference]: With dead ends: 4553 [2021-02-21 16:08:34,715 INFO L226 Difference]: Without dead ends: 0 [2021-02-21 16:08:34,722 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 16:08:34,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-21 16:08:34,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-21 16:08:34,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-21 16:08:34,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-21 16:08:34,723 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-02-21 16:08:34,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:34,724 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-21 16:08:34,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:34,724 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-21 16:08:34,724 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-21 16:08:34,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-02-21 16:08:34,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-21 16:08:36,765 WARN L202 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 576 DAG size of output: 32 [2021-02-21 16:08:36,804 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-21 16:08:36,805 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-21 16:08:36,805 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-21 16:08:36,805 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-21 16:08:36,805 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 16:08:36,805 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-21 16:08:36,806 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-21 16:08:36,806 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 16:08:36,806 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-21 16:08:36,806 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-21 16:08:36,806 INFO L189 CegarLoopUtils]: For program point L93-1(lines 32 118) no Hoare annotation was computed. [2021-02-21 16:08:36,806 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 6 123) no Hoare annotation was computed. [2021-02-21 16:08:36,806 INFO L189 CegarLoopUtils]: For program point L77-1(lines 32 118) no Hoare annotation was computed. [2021-02-21 16:08:36,806 INFO L189 CegarLoopUtils]: For program point L69-1(lines 32 118) no Hoare annotation was computed. [2021-02-21 16:08:36,807 INFO L189 CegarLoopUtils]: For program point L94(line 94) no Hoare annotation was computed. [2021-02-21 16:08:36,807 INFO L189 CegarLoopUtils]: For program point L61-1(lines 32 118) no Hoare annotation was computed. [2021-02-21 16:08:36,807 INFO L192 CegarLoopUtils]: At program point L119(lines 7 123) the Hoare annotation is: true [2021-02-21 16:08:36,807 INFO L189 CegarLoopUtils]: For program point L53(lines 53 55) no Hoare annotation was computed. [2021-02-21 16:08:36,807 INFO L189 CegarLoopUtils]: For program point L53-2(lines 32 118) no Hoare annotation was computed. [2021-02-21 16:08:36,807 INFO L189 CegarLoopUtils]: For program point L103-1(lines 32 118) no Hoare annotation was computed. [2021-02-21 16:08:36,807 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 6 123) no Hoare annotation was computed. [2021-02-21 16:08:36,807 INFO L189 CegarLoopUtils]: For program point L104(line 104) no Hoare annotation was computed. [2021-02-21 16:08:36,808 INFO L189 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 121) no Hoare annotation was computed. [2021-02-21 16:08:36,808 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 6 123) the Hoare annotation is: true [2021-02-21 16:08:36,808 INFO L189 CegarLoopUtils]: For program point L88-1(lines 32 118) no Hoare annotation was computed. [2021-02-21 16:08:36,808 INFO L192 CegarLoopUtils]: At program point L113-1(lines 32 118) the Hoare annotation is: true [2021-02-21 16:08:36,808 INFO L189 CegarLoopUtils]: For program point L89(line 89) no Hoare annotation was computed. [2021-02-21 16:08:36,808 INFO L189 CegarLoopUtils]: For program point L114(line 114) no Hoare annotation was computed. [2021-02-21 16:08:36,808 INFO L185 CegarLoopUtils]: At program point L114-1(lines 7 123) the Hoare annotation is: false [2021-02-21 16:08:36,808 INFO L189 CegarLoopUtils]: For program point L73-1(lines 32 118) no Hoare annotation was computed. [2021-02-21 16:08:36,808 INFO L189 CegarLoopUtils]: For program point L98-1(lines 32 118) no Hoare annotation was computed. [2021-02-21 16:08:36,809 INFO L189 CegarLoopUtils]: For program point L65-1(lines 32 118) no Hoare annotation was computed. [2021-02-21 16:08:36,809 INFO L189 CegarLoopUtils]: For program point L57-1(lines 32 118) no Hoare annotation was computed. [2021-02-21 16:08:36,809 INFO L189 CegarLoopUtils]: For program point L99(line 99) no Hoare annotation was computed. [2021-02-21 16:08:36,809 INFO L189 CegarLoopUtils]: For program point L83-1(lines 32 118) no Hoare annotation was computed. [2021-02-21 16:08:36,809 INFO L189 CegarLoopUtils]: For program point L108-1(lines 32 118) no Hoare annotation was computed. [2021-02-21 16:08:36,809 INFO L189 CegarLoopUtils]: For program point L34(lines 34 36) no Hoare annotation was computed. [2021-02-21 16:08:36,809 INFO L189 CegarLoopUtils]: For program point L84(line 84) no Hoare annotation was computed. [2021-02-21 16:08:36,809 INFO L189 CegarLoopUtils]: For program point L109(line 109) no Hoare annotation was computed. [2021-02-21 16:08:36,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 04:08:36 BoogieIcfgContainer [2021-02-21 16:08:36,822 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 16:08:36,824 INFO L168 Benchmark]: Toolchain (without parser) took 9657.55 ms. Allocated memory was 152.0 MB in the beginning and 282.1 MB in the end (delta: 130.0 MB). Free memory was 128.3 MB in the beginning and 176.7 MB in the end (delta: -48.4 MB). Peak memory consumption was 161.5 MB. Max. memory is 8.0 GB. [2021-02-21 16:08:36,824 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 152.0 MB. Free memory is still 124.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:08:36,825 INFO L168 Benchmark]: CACSL2BoogieTranslator took 373.65 ms. Allocated memory is still 152.0 MB. Free memory was 127.3 MB in the beginning and 117.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-21 16:08:36,825 INFO L168 Benchmark]: Boogie Preprocessor took 88.55 ms. Allocated memory is still 152.0 MB. Free memory was 117.0 MB in the beginning and 115.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 16:08:36,825 INFO L168 Benchmark]: RCFGBuilder took 878.17 ms. Allocated memory is still 152.0 MB. Free memory was 115.3 MB in the beginning and 133.7 MB in the end (delta: -18.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 8.0 GB. [2021-02-21 16:08:36,826 INFO L168 Benchmark]: TraceAbstraction took 8298.91 ms. Allocated memory was 152.0 MB in the beginning and 282.1 MB in the end (delta: 130.0 MB). Free memory was 133.2 MB in the beginning and 176.7 MB in the end (delta: -43.5 MB). Peak memory consumption was 166.2 MB. Max. memory is 8.0 GB. [2021-02-21 16:08:36,827 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 152.0 MB. Free memory is still 124.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 373.65 ms. Allocated memory is still 152.0 MB. Free memory was 127.3 MB in the beginning and 117.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 88.55 ms. Allocated memory is still 152.0 MB. Free memory was 117.0 MB in the beginning and 115.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 878.17 ms. Allocated memory is still 152.0 MB. Free memory was 115.3 MB in the beginning and 133.7 MB in the end (delta: -18.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8298.91 ms. Allocated memory was 152.0 MB in the beginning and 282.1 MB in the end (delta: 130.0 MB). Free memory was 133.2 MB in the beginning and 176.7 MB in the end (delta: -43.5 MB). Peak memory consumption was 166.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 121]: 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: 32]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.1s, OverallIterations: 19, TraceHistogramMax: 1, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1187 SDtfs, 1693 SDslu, 118 SDs, 0 SdLazy, 868 SolverSat, 45 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 133 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2057occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 19 MinimizatonAttempts, 528 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 138 NumberOfFragments, 37 HoareAnnotationTreeSize, 7 FomulaSimplifications, 854054 FormulaSimplificationTreeSizeReduction, 2.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 403 NumberOfCodeBlocks, 403 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 384 ConstructedInterpolants, 0 QuantifiedInterpolants, 25738 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 19 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...