/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 [2021-02-19 17:41:16,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:41:16,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:41:16,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 17:41:16,301 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 17:41:16,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 17:41:16,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 17:41:16,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 17:41:16,310 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 17:41:16,311 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 17:41:16,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 17:41:16,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 17:41:16,316 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 17:41:16,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 17:41:16,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 17:41:16,320 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 17:41:16,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 17:41:16,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 17:41:16,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 17:41:16,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 17:41:16,345 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 17:41:16,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 17:41:16,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 17:41:16,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 17:41:16,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 17:41:16,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 17:41:16,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 17:41:16,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 17:41:16,392 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 [2021-02-19 17:41:16,459 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:41:16,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:41:16,465 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:41:16,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:41:16,466 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:41:16,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:41:16,467 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:41:16,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:41:16,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:41:16,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:41:16,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:41:16,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:41:16,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:41:16,470 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:41:16,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:41:16,470 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:41:16,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:41:16,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:41:16,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:41:16,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:41:16,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:41:16,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:41:16,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:41:16,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:41:16,473 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:41:16,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:41:16,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:41:16,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-19 17:41:16,474 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:41:17,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:41:17,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:41:17,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:41:17,064 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-19 17:41:17,065 INFO L275 PluginConnector]: CDTParser initialized [2021-02-19 17:41:17,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2021-02-19 17:41:17,161 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8eac06224/5d86abfbd0434c1598680ce35e0f7648/FLAG13b9fcdf8 [2021-02-19 17:41:17,844 INFO L306 CDTParser]: Found 1 translation units. [2021-02-19 17:41:17,845 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_7.c [2021-02-19 17:41:17,862 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8eac06224/5d86abfbd0434c1598680ce35e0f7648/FLAG13b9fcdf8 [2021-02-19 17:41:18,208 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8eac06224/5d86abfbd0434c1598680ce35e0f7648 [2021-02-19 17:41:18,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:41:18,227 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:41:18,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-19 17:41:18,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-19 17:41:18,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-19 17:41:18,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:41:18" (1/1) ... [2021-02-19 17:41:18,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4873ad51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:18, skipping insertion in model container [2021-02-19 17:41:18,237 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:41:18" (1/1) ... [2021-02-19 17:41:18,249 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-19 17:41:18,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-19 17:41:18,496 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] [2021-02-19 17:41:18,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:41:18,527 INFO L203 MainTranslator]: Completed pre-run [2021-02-19 17:41:18,589 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] [2021-02-19 17:41:18,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:41:18,623 INFO L208 MainTranslator]: Completed translation [2021-02-19 17:41:18,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:18 WrapperNode [2021-02-19 17:41:18,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-19 17:41:18,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:41:18,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:41:18,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:41:18,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:18" (1/1) ... [2021-02-19 17:41:18,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:18" (1/1) ... [2021-02-19 17:41:18,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:18" (1/1) ... [2021-02-19 17:41:18,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:18" (1/1) ... [2021-02-19 17:41:18,693 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:18" (1/1) ... [2021-02-19 17:41:18,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:18" (1/1) ... [2021-02-19 17:41:18,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:18" (1/1) ... [2021-02-19 17:41:18,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:41:18,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:41:18,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:41:18,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:41:18,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:18" (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 [2021-02-19 17:41:18,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-19 17:41:18,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:41:18,907 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-19 17:41:18,907 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-19 17:41:18,907 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-19 17:41:18,907 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-19 17:41:18,908 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-19 17:41:18,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-19 17:41:18,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-19 17:41:18,909 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-19 17:41:18,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-19 17:41:18,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-19 17:41:18,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:41:18,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-19 17:41:18,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-19 17:41:18,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-19 17:41:19,591 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:41:19,592 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-19 17:41:19,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:41:19 BoogieIcfgContainer [2021-02-19 17:41:19,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:41:19,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:41:19,597 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:41:19,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:41:19,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 05:41:18" (1/3) ... [2021-02-19 17:41:19,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b09dbbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:41:19, skipping insertion in model container [2021-02-19 17:41:19,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:41:18" (2/3) ... [2021-02-19 17:41:19,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b09dbbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:41:19, skipping insertion in model container [2021-02-19 17:41:19,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:41:19" (3/3) ... [2021-02-19 17:41:19,606 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2021-02-19 17:41:19,616 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:41:19,624 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:41:19,652 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-19 17:41:19,686 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:41:19,687 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:41:19,687 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:41:19,687 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:41:19,687 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:41:19,688 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:41:19,688 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:41:19,688 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:41:19,710 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2021-02-19 17:41:19,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:41:19,718 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:19,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:19,720 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:19,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:19,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1576798563, now seen corresponding path program 1 times [2021-02-19 17:41:19,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:19,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22327062] [2021-02-19 17:41:19,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:19,990 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:19,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:19,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:19,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:20,046 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:20,048 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:20,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:20,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:20,222 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:20,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22327062] [2021-02-19 17:41:20,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:20,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:20,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412368495] [2021-02-19 17:41:20,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:20,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:20,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:20,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:20,278 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2021-02-19 17:41:20,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:20,784 INFO L93 Difference]: Finished difference Result 70 states and 115 transitions. [2021-02-19 17:41:20,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:20,787 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-02-19 17:41:20,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:20,808 INFO L225 Difference]: With dead ends: 70 [2021-02-19 17:41:20,809 INFO L226 Difference]: Without dead ends: 55 [2021-02-19 17:41:20,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:41:20,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-02-19 17:41:20,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2021-02-19 17:41:20,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-02-19 17:41:20,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 66 transitions. [2021-02-19 17:41:20,869 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 66 transitions. Word has length 18 [2021-02-19 17:41:20,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:20,869 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 66 transitions. [2021-02-19 17:41:20,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:20,870 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 66 transitions. [2021-02-19 17:41:20,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:41:20,871 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:20,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:20,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:41:20,872 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:20,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:20,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1969825573, now seen corresponding path program 1 times [2021-02-19 17:41:20,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:20,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468121414] [2021-02-19 17:41:20,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:20,943 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:20,945 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:20,947 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:20,948 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:20,955 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:20,956 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:20,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:20,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:21,036 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,038 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:21,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468121414] [2021-02-19 17:41:21,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:21,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:21,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137681115] [2021-02-19 17:41:21,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:21,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:21,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:21,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:21,052 INFO L87 Difference]: Start difference. First operand 39 states and 66 transitions. Second operand 4 states. [2021-02-19 17:41:21,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:21,327 INFO L93 Difference]: Finished difference Result 88 states and 153 transitions. [2021-02-19 17:41:21,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:21,327 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-02-19 17:41:21,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:21,329 INFO L225 Difference]: With dead ends: 88 [2021-02-19 17:41:21,329 INFO L226 Difference]: Without dead ends: 55 [2021-02-19 17:41:21,331 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 [2021-02-19 17:41:21,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-02-19 17:41:21,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-02-19 17:41:21,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-02-19 17:41:21,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 90 transitions. [2021-02-19 17:41:21,343 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 90 transitions. Word has length 18 [2021-02-19 17:41:21,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:21,343 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 90 transitions. [2021-02-19 17:41:21,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:21,343 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 90 transitions. [2021-02-19 17:41:21,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:41:21,344 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:21,345 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:21,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 17:41:21,345 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:21,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:21,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1635900842, now seen corresponding path program 1 times [2021-02-19 17:41:21,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:21,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572871505] [2021-02-19 17:41:21,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:21,385 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,385 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,386 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:41:21,391 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,392 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:21,432 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,433 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:21,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572871505] [2021-02-19 17:41:21,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:21,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:21,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632017648] [2021-02-19 17:41:21,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:21,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:21,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:21,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:21,438 INFO L87 Difference]: Start difference. First operand 53 states and 90 transitions. Second operand 4 states. [2021-02-19 17:41:21,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:21,606 INFO L93 Difference]: Finished difference Result 82 states and 136 transitions. [2021-02-19 17:41:21,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:21,607 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-19 17:41:21,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:21,609 INFO L225 Difference]: With dead ends: 82 [2021-02-19 17:41:21,609 INFO L226 Difference]: Without dead ends: 58 [2021-02-19 17:41:21,610 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 [2021-02-19 17:41:21,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-02-19 17:41:21,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-02-19 17:41:21,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-02-19 17:41:21,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 92 transitions. [2021-02-19 17:41:21,622 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 92 transitions. Word has length 19 [2021-02-19 17:41:21,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:21,622 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 92 transitions. [2021-02-19 17:41:21,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:21,623 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 92 transitions. [2021-02-19 17:41:21,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:41:21,623 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:21,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:21,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 17:41:21,624 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:21,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:21,625 INFO L82 PathProgramCache]: Analyzing trace with hash -934836264, now seen corresponding path program 1 times [2021-02-19 17:41:21,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:21,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838771010] [2021-02-19 17:41:21,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:21,665 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,666 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,668 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,669 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:21,675 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,676 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:21,730 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,732 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:21,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838771010] [2021-02-19 17:41:21,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:21,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:21,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502776057] [2021-02-19 17:41:21,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:21,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:21,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:21,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:21,742 INFO L87 Difference]: Start difference. First operand 56 states and 92 transitions. Second operand 4 states. [2021-02-19 17:41:21,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:21,904 INFO L93 Difference]: Finished difference Result 148 states and 252 transitions. [2021-02-19 17:41:21,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:21,905 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-19 17:41:21,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:21,907 INFO L225 Difference]: With dead ends: 148 [2021-02-19 17:41:21,907 INFO L226 Difference]: Without dead ends: 101 [2021-02-19 17:41:21,908 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 [2021-02-19 17:41:21,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-02-19 17:41:21,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2021-02-19 17:41:21,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-02-19 17:41:21,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 165 transitions. [2021-02-19 17:41:21,922 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 165 transitions. Word has length 19 [2021-02-19 17:41:21,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:21,923 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 165 transitions. [2021-02-19 17:41:21,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:21,923 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 165 transitions. [2021-02-19 17:41:21,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:41:21,924 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:21,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:41:21,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 17:41:21,925 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:21,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:21,925 INFO L82 PathProgramCache]: Analyzing trace with hash -541809254, now seen corresponding path program 1 times [2021-02-19 17:41:21,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:21,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079283690] [2021-02-19 17:41:21,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:21,952 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,953 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,954 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:21,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,959 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:21,992 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:21,996 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:21,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:21,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079283690] [2021-02-19 17:41:21,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:21,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:21,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162245135] [2021-02-19 17:41:21,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:21,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:22,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:22,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:22,004 INFO L87 Difference]: Start difference. First operand 99 states and 165 transitions. Second operand 4 states. [2021-02-19 17:41:22,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:22,123 INFO L93 Difference]: Finished difference Result 127 states and 211 transitions. [2021-02-19 17:41:22,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:22,123 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-19 17:41:22,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:22,125 INFO L225 Difference]: With dead ends: 127 [2021-02-19 17:41:22,125 INFO L226 Difference]: Without dead ends: 125 [2021-02-19 17:41:22,126 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 [2021-02-19 17:41:22,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-02-19 17:41:22,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 99. [2021-02-19 17:41:22,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-02-19 17:41:22,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 163 transitions. [2021-02-19 17:41:22,138 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 163 transitions. Word has length 19 [2021-02-19 17:41:22,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:22,139 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 163 transitions. [2021-02-19 17:41:22,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:22,139 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 163 transitions. [2021-02-19 17:41:22,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:41:22,140 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:22,140 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] [2021-02-19 17:41:22,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 17:41:22,141 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:22,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:22,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1085061584, now seen corresponding path program 1 times [2021-02-19 17:41:22,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:22,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995916984] [2021-02-19 17:41:22,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:22,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,166 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:22,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,172 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:22,204 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,205 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:22,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995916984] [2021-02-19 17:41:22,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:22,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:22,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506919355] [2021-02-19 17:41:22,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:22,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:22,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:22,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:22,208 INFO L87 Difference]: Start difference. First operand 99 states and 163 transitions. Second operand 4 states. [2021-02-19 17:41:22,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:22,344 INFO L93 Difference]: Finished difference Result 179 states and 299 transitions. [2021-02-19 17:41:22,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:22,344 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-19 17:41:22,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:22,347 INFO L225 Difference]: With dead ends: 179 [2021-02-19 17:41:22,347 INFO L226 Difference]: Without dead ends: 177 [2021-02-19 17:41:22,348 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 [2021-02-19 17:41:22,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-02-19 17:41:22,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2021-02-19 17:41:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2021-02-19 17:41:22,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 221 transitions. [2021-02-19 17:41:22,362 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 221 transitions. Word has length 20 [2021-02-19 17:41:22,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:22,363 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 221 transitions. [2021-02-19 17:41:22,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:22,363 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 221 transitions. [2021-02-19 17:41:22,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:41:22,365 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:22,365 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] [2021-02-19 17:41:22,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 17:41:22,365 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:22,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:22,366 INFO L82 PathProgramCache]: Analyzing trace with hash 692034574, now seen corresponding path program 1 times [2021-02-19 17:41:22,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:22,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45307905] [2021-02-19 17:41:22,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:22,390 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,391 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,392 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:22,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,396 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:22,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:22,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45307905] [2021-02-19 17:41:22,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:22,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:22,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239097390] [2021-02-19 17:41:22,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:22,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:22,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:22,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:22,433 INFO L87 Difference]: Start difference. First operand 135 states and 221 transitions. Second operand 4 states. [2021-02-19 17:41:22,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:22,564 INFO L93 Difference]: Finished difference Result 311 states and 515 transitions. [2021-02-19 17:41:22,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:22,565 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-19 17:41:22,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:22,567 INFO L225 Difference]: With dead ends: 311 [2021-02-19 17:41:22,567 INFO L226 Difference]: Without dead ends: 185 [2021-02-19 17:41:22,569 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 [2021-02-19 17:41:22,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-02-19 17:41:22,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2021-02-19 17:41:22,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2021-02-19 17:41:22,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 295 transitions. [2021-02-19 17:41:22,586 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 295 transitions. Word has length 20 [2021-02-19 17:41:22,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:22,586 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 295 transitions. [2021-02-19 17:41:22,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:22,587 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 295 transitions. [2021-02-19 17:41:22,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:41:22,588 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:22,588 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] [2021-02-19 17:41:22,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 17:41:22,589 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:22,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:22,589 INFO L82 PathProgramCache]: Analyzing trace with hash -722614227, now seen corresponding path program 1 times [2021-02-19 17:41:22,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:22,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151849533] [2021-02-19 17:41:22,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:22,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,612 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,612 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:41:22,617 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,617 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:22,649 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,650 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:22,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151849533] [2021-02-19 17:41:22,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:22,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:22,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477668874] [2021-02-19 17:41:22,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:22,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:22,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:22,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:22,654 INFO L87 Difference]: Start difference. First operand 183 states and 295 transitions. Second operand 4 states. [2021-02-19 17:41:22,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:22,769 INFO L93 Difference]: Finished difference Result 277 states and 445 transitions. [2021-02-19 17:41:22,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:22,770 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-19 17:41:22,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:22,771 INFO L225 Difference]: With dead ends: 277 [2021-02-19 17:41:22,771 INFO L226 Difference]: Without dead ends: 191 [2021-02-19 17:41:22,773 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 [2021-02-19 17:41:22,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-02-19 17:41:22,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2021-02-19 17:41:22,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2021-02-19 17:41:22,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 299 transitions. [2021-02-19 17:41:22,787 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 299 transitions. Word has length 21 [2021-02-19 17:41:22,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:22,787 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 299 transitions. [2021-02-19 17:41:22,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:22,788 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 299 transitions. [2021-02-19 17:41:22,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:41:22,789 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:22,789 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] [2021-02-19 17:41:22,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-19 17:41:22,790 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:22,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:22,790 INFO L82 PathProgramCache]: Analyzing trace with hash -21549649, now seen corresponding path program 1 times [2021-02-19 17:41:22,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:22,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775964066] [2021-02-19 17:41:22,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:22,812 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,812 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,813 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,814 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:22,817 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,818 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:22,848 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:22,849 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:22,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:22,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775964066] [2021-02-19 17:41:22,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:22,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:22,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726045277] [2021-02-19 17:41:22,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:22,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:22,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:22,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:22,853 INFO L87 Difference]: Start difference. First operand 189 states and 299 transitions. Second operand 4 states. [2021-02-19 17:41:22,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:22,976 INFO L93 Difference]: Finished difference Result 333 states and 533 transitions. [2021-02-19 17:41:22,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:22,976 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-19 17:41:22,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:22,979 INFO L225 Difference]: With dead ends: 333 [2021-02-19 17:41:22,979 INFO L226 Difference]: Without dead ends: 331 [2021-02-19 17:41:22,980 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 [2021-02-19 17:41:22,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-02-19 17:41:23,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 265. [2021-02-19 17:41:23,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2021-02-19 17:41:23,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 411 transitions. [2021-02-19 17:41:23,005 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 411 transitions. Word has length 21 [2021-02-19 17:41:23,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:23,005 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 411 transitions. [2021-02-19 17:41:23,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:23,006 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 411 transitions. [2021-02-19 17:41:23,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:41:23,008 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:23,008 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] [2021-02-19 17:41:23,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-19 17:41:23,009 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:23,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:23,009 INFO L82 PathProgramCache]: Analyzing trace with hash -414576659, now seen corresponding path program 1 times [2021-02-19 17:41:23,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:23,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339536271] [2021-02-19 17:41:23,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:23,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:23,032 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,033 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,033 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:23,037 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,038 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:23,070 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,070 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:23,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339536271] [2021-02-19 17:41:23,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:23,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:23,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102388656] [2021-02-19 17:41:23,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:23,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:23,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:23,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:23,074 INFO L87 Difference]: Start difference. First operand 265 states and 411 transitions. Second operand 4 states. [2021-02-19 17:41:23,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:23,201 INFO L93 Difference]: Finished difference Result 605 states and 941 transitions. [2021-02-19 17:41:23,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:23,201 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-19 17:41:23,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:23,204 INFO L225 Difference]: With dead ends: 605 [2021-02-19 17:41:23,204 INFO L226 Difference]: Without dead ends: 355 [2021-02-19 17:41:23,205 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 [2021-02-19 17:41:23,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-02-19 17:41:23,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 353. [2021-02-19 17:41:23,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2021-02-19 17:41:23,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 535 transitions. [2021-02-19 17:41:23,223 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 535 transitions. Word has length 21 [2021-02-19 17:41:23,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:23,223 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 535 transitions. [2021-02-19 17:41:23,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:23,224 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 535 transitions. [2021-02-19 17:41:23,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:41:23,225 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:23,225 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] [2021-02-19 17:41:23,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-19 17:41:23,226 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:23,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:23,226 INFO L82 PathProgramCache]: Analyzing trace with hash -667823741, now seen corresponding path program 1 times [2021-02-19 17:41:23,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:23,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434569672] [2021-02-19 17:41:23,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:23,246 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,247 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,247 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:41:23,251 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,251 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:23,279 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:23,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434569672] [2021-02-19 17:41:23,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:23,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:23,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890049500] [2021-02-19 17:41:23,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:23,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:23,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:23,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:23,283 INFO L87 Difference]: Start difference. First operand 353 states and 535 transitions. Second operand 4 states. [2021-02-19 17:41:23,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:23,394 INFO L93 Difference]: Finished difference Result 529 states and 797 transitions. [2021-02-19 17:41:23,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:23,395 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-19 17:41:23,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:23,397 INFO L225 Difference]: With dead ends: 529 [2021-02-19 17:41:23,397 INFO L226 Difference]: Without dead ends: 363 [2021-02-19 17:41:23,398 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 [2021-02-19 17:41:23,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-02-19 17:41:23,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 361. [2021-02-19 17:41:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2021-02-19 17:41:23,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 535 transitions. [2021-02-19 17:41:23,416 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 535 transitions. Word has length 22 [2021-02-19 17:41:23,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:23,416 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 535 transitions. [2021-02-19 17:41:23,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:23,417 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 535 transitions. [2021-02-19 17:41:23,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:41:23,417 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:23,418 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] [2021-02-19 17:41:23,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-19 17:41:23,418 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:23,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:23,419 INFO L82 PathProgramCache]: Analyzing trace with hash 33240837, now seen corresponding path program 1 times [2021-02-19 17:41:23,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:23,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363380253] [2021-02-19 17:41:23,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:23,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:23,437 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,438 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,439 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:23,442 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,443 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:23,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:23,470 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,471 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:23,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363380253] [2021-02-19 17:41:23,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:23,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:23,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780989535] [2021-02-19 17:41:23,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:23,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:23,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:23,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:23,474 INFO L87 Difference]: Start difference. First operand 361 states and 535 transitions. Second operand 4 states. [2021-02-19 17:41:23,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:23,597 INFO L93 Difference]: Finished difference Result 621 states and 929 transitions. [2021-02-19 17:41:23,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:23,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-19 17:41:23,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:23,601 INFO L225 Difference]: With dead ends: 621 [2021-02-19 17:41:23,601 INFO L226 Difference]: Without dead ends: 619 [2021-02-19 17:41:23,602 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 [2021-02-19 17:41:23,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-02-19 17:41:23,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 521. [2021-02-19 17:41:23,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2021-02-19 17:41:23,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 751 transitions. [2021-02-19 17:41:23,625 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 751 transitions. Word has length 22 [2021-02-19 17:41:23,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:23,625 INFO L480 AbstractCegarLoop]: Abstraction has 521 states and 751 transitions. [2021-02-19 17:41:23,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:23,626 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 751 transitions. [2021-02-19 17:41:23,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:41:23,627 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:23,627 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] [2021-02-19 17:41:23,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-19 17:41:23,627 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:23,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:23,628 INFO L82 PathProgramCache]: Analyzing trace with hash -359786173, now seen corresponding path program 1 times [2021-02-19 17:41:23,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:23,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391095779] [2021-02-19 17:41:23,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:23,645 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,646 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:23,650 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,651 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:23,678 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,681 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:23,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391095779] [2021-02-19 17:41:23,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:23,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:23,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170152369] [2021-02-19 17:41:23,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:23,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:23,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:23,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:23,684 INFO L87 Difference]: Start difference. First operand 521 states and 751 transitions. Second operand 4 states. [2021-02-19 17:41:23,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:23,830 INFO L93 Difference]: Finished difference Result 1181 states and 1697 transitions. [2021-02-19 17:41:23,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:23,831 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-19 17:41:23,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:23,835 INFO L225 Difference]: With dead ends: 1181 [2021-02-19 17:41:23,835 INFO L226 Difference]: Without dead ends: 683 [2021-02-19 17:41:23,836 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 [2021-02-19 17:41:23,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-02-19 17:41:23,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 681. [2021-02-19 17:41:23,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 681 states. [2021-02-19 17:41:23,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 951 transitions. [2021-02-19 17:41:23,870 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 951 transitions. Word has length 22 [2021-02-19 17:41:23,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:23,870 INFO L480 AbstractCegarLoop]: Abstraction has 681 states and 951 transitions. [2021-02-19 17:41:23,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:23,870 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 951 transitions. [2021-02-19 17:41:23,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:41:23,871 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:23,872 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] [2021-02-19 17:41:23,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-19 17:41:23,872 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:23,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:23,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1030681666, now seen corresponding path program 1 times [2021-02-19 17:41:23,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:23,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65037034] [2021-02-19 17:41:23,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:23,890 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,891 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:41:23,895 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,895 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:23,925 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:23,925 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:23,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65037034] [2021-02-19 17:41:23,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:23,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:23,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327001935] [2021-02-19 17:41:23,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:23,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:23,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:23,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:23,929 INFO L87 Difference]: Start difference. First operand 681 states and 951 transitions. Second operand 4 states. [2021-02-19 17:41:24,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:24,060 INFO L93 Difference]: Finished difference Result 1021 states and 1417 transitions. [2021-02-19 17:41:24,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:24,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-19 17:41:24,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:24,065 INFO L225 Difference]: With dead ends: 1021 [2021-02-19 17:41:24,065 INFO L226 Difference]: Without dead ends: 699 [2021-02-19 17:41:24,067 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 [2021-02-19 17:41:24,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-02-19 17:41:24,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 697. [2021-02-19 17:41:24,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2021-02-19 17:41:24,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 951 transitions. [2021-02-19 17:41:24,099 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 951 transitions. Word has length 23 [2021-02-19 17:41:24,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:24,100 INFO L480 AbstractCegarLoop]: Abstraction has 697 states and 951 transitions. [2021-02-19 17:41:24,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:24,100 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 951 transitions. [2021-02-19 17:41:24,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:41:24,101 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:24,102 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] [2021-02-19 17:41:24,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-19 17:41:24,102 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:24,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:24,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1731746244, now seen corresponding path program 1 times [2021-02-19 17:41:24,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:24,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166097917] [2021-02-19 17:41:24,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:24,128 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,129 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:24,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:24,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:24,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:24,163 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,164 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:24,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166097917] [2021-02-19 17:41:24,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:24,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:24,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173877244] [2021-02-19 17:41:24,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:24,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:24,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:24,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:24,167 INFO L87 Difference]: Start difference. First operand 697 states and 951 transitions. Second operand 4 states. [2021-02-19 17:41:24,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:24,314 INFO L93 Difference]: Finished difference Result 1165 states and 1593 transitions. [2021-02-19 17:41:24,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:24,315 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-19 17:41:24,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:24,321 INFO L225 Difference]: With dead ends: 1165 [2021-02-19 17:41:24,321 INFO L226 Difference]: Without dead ends: 1163 [2021-02-19 17:41:24,323 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 [2021-02-19 17:41:24,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-02-19 17:41:24,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1033. [2021-02-19 17:41:24,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1033 states. [2021-02-19 17:41:24,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1367 transitions. [2021-02-19 17:41:24,369 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1367 transitions. Word has length 23 [2021-02-19 17:41:24,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:24,369 INFO L480 AbstractCegarLoop]: Abstraction has 1033 states and 1367 transitions. [2021-02-19 17:41:24,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:24,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1367 transitions. [2021-02-19 17:41:24,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:41:24,372 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:24,372 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] [2021-02-19 17:41:24,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-19 17:41:24,372 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:24,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:24,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1338719234, now seen corresponding path program 1 times [2021-02-19 17:41:24,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:24,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147591906] [2021-02-19 17:41:24,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:24,390 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,391 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:24,391 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,392 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:24,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,396 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:24,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:24,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,448 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:24,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147591906] [2021-02-19 17:41:24,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:24,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:24,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858035431] [2021-02-19 17:41:24,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:24,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:24,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:24,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:24,452 INFO L87 Difference]: Start difference. First operand 1033 states and 1367 transitions. Second operand 4 states. [2021-02-19 17:41:24,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:24,632 INFO L93 Difference]: Finished difference Result 2317 states and 3033 transitions. [2021-02-19 17:41:24,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:24,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-19 17:41:24,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:24,641 INFO L225 Difference]: With dead ends: 2317 [2021-02-19 17:41:24,641 INFO L226 Difference]: Without dead ends: 1323 [2021-02-19 17:41:24,645 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 [2021-02-19 17:41:24,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2021-02-19 17:41:24,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1321. [2021-02-19 17:41:24,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1321 states. [2021-02-19 17:41:24,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1671 transitions. [2021-02-19 17:41:24,722 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1671 transitions. Word has length 23 [2021-02-19 17:41:24,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:24,723 INFO L480 AbstractCegarLoop]: Abstraction has 1321 states and 1671 transitions. [2021-02-19 17:41:24,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:24,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1671 transitions. [2021-02-19 17:41:24,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 17:41:24,726 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:24,726 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] [2021-02-19 17:41:24,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-19 17:41:24,727 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:24,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:24,727 INFO L82 PathProgramCache]: Analyzing trace with hash 2144742072, now seen corresponding path program 1 times [2021-02-19 17:41:24,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:24,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388161680] [2021-02-19 17:41:24,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:24,747 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,748 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:24,749 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,749 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:41:24,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,753 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:24,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:24,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:24,781 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:24,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:24,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388161680] [2021-02-19 17:41:24,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:24,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:24,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972173391] [2021-02-19 17:41:24,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:24,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:24,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:24,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:24,785 INFO L87 Difference]: Start difference. First operand 1321 states and 1671 transitions. Second operand 4 states. [2021-02-19 17:41:24,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:24,938 INFO L93 Difference]: Finished difference Result 1981 states and 2489 transitions. [2021-02-19 17:41:24,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:24,938 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-19 17:41:24,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:24,948 INFO L225 Difference]: With dead ends: 1981 [2021-02-19 17:41:24,948 INFO L226 Difference]: Without dead ends: 1355 [2021-02-19 17:41:24,951 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 [2021-02-19 17:41:24,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-02-19 17:41:25,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1353. [2021-02-19 17:41:25,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1353 states. [2021-02-19 17:41:25,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 1671 transitions. [2021-02-19 17:41:25,017 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 1671 transitions. Word has length 24 [2021-02-19 17:41:25,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:25,018 INFO L480 AbstractCegarLoop]: Abstraction has 1353 states and 1671 transitions. [2021-02-19 17:41:25,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:25,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 1671 transitions. [2021-02-19 17:41:25,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 17:41:25,021 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:25,021 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] [2021-02-19 17:41:25,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-19 17:41:25,022 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:25,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:25,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1449160646, now seen corresponding path program 1 times [2021-02-19 17:41:25,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:25,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870408810] [2021-02-19 17:41:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:25,049 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:25,049 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:25,050 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:25,051 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:25,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:25,055 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:25,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:25,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:25,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:25,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870408810] [2021-02-19 17:41:25,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:25,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:25,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778117724] [2021-02-19 17:41:25,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:25,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:25,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:25,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:25,089 INFO L87 Difference]: Start difference. First operand 1353 states and 1671 transitions. Second operand 4 states. [2021-02-19 17:41:25,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:25,289 INFO L93 Difference]: Finished difference Result 2187 states and 2664 transitions. [2021-02-19 17:41:25,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:25,290 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-19 17:41:25,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:25,301 INFO L225 Difference]: With dead ends: 2187 [2021-02-19 17:41:25,302 INFO L226 Difference]: Without dead ends: 2185 [2021-02-19 17:41:25,303 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 [2021-02-19 17:41:25,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2021-02-19 17:41:25,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 2057. [2021-02-19 17:41:25,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2057 states. [2021-02-19 17:41:25,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 2471 transitions. [2021-02-19 17:41:25,400 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 2471 transitions. Word has length 24 [2021-02-19 17:41:25,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:25,400 INFO L480 AbstractCegarLoop]: Abstraction has 2057 states and 2471 transitions. [2021-02-19 17:41:25,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:25,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 2471 transitions. [2021-02-19 17:41:25,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 17:41:25,405 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:41:25,405 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] [2021-02-19 17:41:25,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-02-19 17:41:25,406 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:41:25,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:41:25,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1842187656, now seen corresponding path program 1 times [2021-02-19 17:41:25,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:41:25,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156689382] [2021-02-19 17:41:25,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:41:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:25,426 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:25,427 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:25,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:25,428 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:41:25,432 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:25,433 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:25,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:41:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:41:25,463 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:41:25,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:41:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:41:25,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156689382] [2021-02-19 17:41:25,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:41:25,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:41:25,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504097270] [2021-02-19 17:41:25,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:41:25,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:41:25,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:41:25,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:41:25,469 INFO L87 Difference]: Start difference. First operand 2057 states and 2471 transitions. Second operand 4 states. [2021-02-19 17:41:25,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:41:25,666 INFO L93 Difference]: Finished difference Result 4553 states and 5351 transitions. [2021-02-19 17:41:25,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:41:25,666 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-19 17:41:25,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:41:25,667 INFO L225 Difference]: With dead ends: 4553 [2021-02-19 17:41:25,667 INFO L226 Difference]: Without dead ends: 0 [2021-02-19 17:41:25,675 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 [2021-02-19 17:41:25,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-19 17:41:25,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-19 17:41:25,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-19 17:41:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-19 17:41:25,676 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-02-19 17:41:25,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:41:25,676 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-19 17:41:25,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:41:25,676 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-19 17:41:25,677 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-19 17:41:25,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-02-19 17:41:25,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-19 17:41:27,934 WARN L202 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 576 DAG size of output: 32 [2021-02-19 17:41:27,971 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-19 17:41:27,971 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-19 17:41:27,972 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-19 17:41:27,972 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-19 17:41:27,972 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|)) [2021-02-19 17:41:27,972 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-19 17:41:27,972 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-19 17:41:27,973 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-19 17:41:27,973 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-19 17:41:27,973 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-19 17:41:27,973 INFO L189 CegarLoopUtils]: For program point L93-1(lines 32 118) no Hoare annotation was computed. [2021-02-19 17:41:27,973 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 6 123) no Hoare annotation was computed. [2021-02-19 17:41:27,973 INFO L189 CegarLoopUtils]: For program point L77-1(lines 32 118) no Hoare annotation was computed. [2021-02-19 17:41:27,973 INFO L189 CegarLoopUtils]: For program point L69-1(lines 32 118) no Hoare annotation was computed. [2021-02-19 17:41:27,973 INFO L189 CegarLoopUtils]: For program point L94(line 94) no Hoare annotation was computed. [2021-02-19 17:41:27,973 INFO L189 CegarLoopUtils]: For program point L61-1(lines 32 118) no Hoare annotation was computed. [2021-02-19 17:41:27,974 INFO L192 CegarLoopUtils]: At program point L119(lines 7 123) the Hoare annotation is: true [2021-02-19 17:41:27,974 INFO L189 CegarLoopUtils]: For program point L53(lines 53 55) no Hoare annotation was computed. [2021-02-19 17:41:27,974 INFO L189 CegarLoopUtils]: For program point L53-2(lines 32 118) no Hoare annotation was computed. [2021-02-19 17:41:27,974 INFO L189 CegarLoopUtils]: For program point L103-1(lines 32 118) no Hoare annotation was computed. [2021-02-19 17:41:27,974 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 6 123) no Hoare annotation was computed. [2021-02-19 17:41:27,974 INFO L189 CegarLoopUtils]: For program point L104(line 104) no Hoare annotation was computed. [2021-02-19 17:41:27,974 INFO L189 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 121) no Hoare annotation was computed. [2021-02-19 17:41:27,974 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 6 123) the Hoare annotation is: true [2021-02-19 17:41:27,975 INFO L189 CegarLoopUtils]: For program point L88-1(lines 32 118) no Hoare annotation was computed. [2021-02-19 17:41:27,975 INFO L192 CegarLoopUtils]: At program point L113-1(lines 32 118) the Hoare annotation is: true [2021-02-19 17:41:27,975 INFO L189 CegarLoopUtils]: For program point L89(line 89) no Hoare annotation was computed. [2021-02-19 17:41:27,975 INFO L189 CegarLoopUtils]: For program point L114(line 114) no Hoare annotation was computed. [2021-02-19 17:41:27,975 INFO L185 CegarLoopUtils]: At program point L114-1(lines 7 123) the Hoare annotation is: false [2021-02-19 17:41:27,975 INFO L189 CegarLoopUtils]: For program point L73-1(lines 32 118) no Hoare annotation was computed. [2021-02-19 17:41:27,975 INFO L189 CegarLoopUtils]: For program point L98-1(lines 32 118) no Hoare annotation was computed. [2021-02-19 17:41:27,975 INFO L189 CegarLoopUtils]: For program point L65-1(lines 32 118) no Hoare annotation was computed. [2021-02-19 17:41:27,975 INFO L189 CegarLoopUtils]: For program point L57-1(lines 32 118) no Hoare annotation was computed. [2021-02-19 17:41:27,975 INFO L189 CegarLoopUtils]: For program point L99(line 99) no Hoare annotation was computed. [2021-02-19 17:41:27,976 INFO L189 CegarLoopUtils]: For program point L83-1(lines 32 118) no Hoare annotation was computed. [2021-02-19 17:41:27,976 INFO L189 CegarLoopUtils]: For program point L108-1(lines 32 118) no Hoare annotation was computed. [2021-02-19 17:41:27,976 INFO L189 CegarLoopUtils]: For program point L34(lines 34 36) no Hoare annotation was computed. [2021-02-19 17:41:27,976 INFO L189 CegarLoopUtils]: For program point L84(line 84) no Hoare annotation was computed. [2021-02-19 17:41:27,976 INFO L189 CegarLoopUtils]: For program point L109(line 109) no Hoare annotation was computed. [2021-02-19 17:41:27,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 05:41:27 BoogieIcfgContainer [2021-02-19 17:41:27,989 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 17:41:27,991 INFO L168 Benchmark]: Toolchain (without parser) took 9777.14 ms. Allocated memory was 182.5 MB in the beginning and 319.8 MB in the end (delta: 137.4 MB). Free memory was 156.9 MB in the beginning and 141.3 MB in the end (delta: 15.6 MB). Peak memory consumption was 154.1 MB. Max. memory is 8.0 GB. [2021-02-19 17:41:27,991 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 182.5 MB. Free memory is still 163.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-19 17:41:27,991 INFO L168 Benchmark]: CACSL2BoogieTranslator took 397.39 ms. Allocated memory is still 182.5 MB. Free memory was 155.8 MB in the beginning and 145.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-19 17:41:27,992 INFO L168 Benchmark]: Boogie Preprocessor took 99.25 ms. Allocated memory is still 182.5 MB. Free memory was 145.3 MB in the beginning and 143.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-19 17:41:27,992 INFO L168 Benchmark]: RCFGBuilder took 864.97 ms. Allocated memory is still 182.5 MB. Free memory was 143.6 MB in the beginning and 154.8 MB in the end (delta: -11.2 MB). Peak memory consumption was 13.4 MB. Max. memory is 8.0 GB. [2021-02-19 17:41:27,992 INFO L168 Benchmark]: TraceAbstraction took 8393.04 ms. Allocated memory was 182.5 MB in the beginning and 319.8 MB in the end (delta: 137.4 MB). Free memory was 154.2 MB in the beginning and 141.3 MB in the end (delta: 12.9 MB). Peak memory consumption was 150.2 MB. Max. memory is 8.0 GB. [2021-02-19 17:41:27,994 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 182.5 MB. Free memory is still 163.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 397.39 ms. Allocated memory is still 182.5 MB. Free memory was 155.8 MB in the beginning and 145.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 99.25 ms. Allocated memory is still 182.5 MB. Free memory was 145.3 MB in the beginning and 143.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 864.97 ms. Allocated memory is still 182.5 MB. Free memory was 143.6 MB in the beginning and 154.8 MB in the end (delta: -11.2 MB). Peak memory consumption was 13.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8393.04 ms. Allocated memory was 182.5 MB in the beginning and 319.8 MB in the end (delta: 137.4 MB). Free memory was 154.2 MB in the beginning and 141.3 MB in the end (delta: 12.9 MB). Peak memory consumption was 150.2 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: 5.9s, OverallIterations: 19, TraceHistogramMax: 1, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1187 SDtfs, 1693 SDslu, 118 SDs, 0 SdLazy, 868 SolverSat, 45 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s 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: 0.5s AutomataMinimizationTime, 19 MinimizatonAttempts, 528 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 138 NumberOfFragments, 37 HoareAnnotationTreeSize, 7 FomulaSimplifications, 854054 FormulaSimplificationTreeSizeReduction, 2.2s HoareSimplificationTime, 7 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s 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...