/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_11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:08:06,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:08:06,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:08:06,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 16:08:06,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 16:08:06,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 16:08:06,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 16:08:06,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 16:08:06,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 16:08:06,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 16:08:06,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 16:08:06,659 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 16:08:06,660 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:08:06,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:08:06,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:08:06,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:08:06,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:08:06,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:08:06,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:08:06,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:08:06,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:08:06,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:08:06,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:08:06,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:08:06,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 16:08:06,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:08:06,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:08:06,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:08:06,760 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-21 16:08:06,824 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:08:06,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:08:06,831 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:08:06,831 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:08:06,832 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:08:06,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:08:06,832 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:08:06,832 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:08:06,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:08:06,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:08:06,834 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:08:06,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:08:06,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:08:06,835 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:08:06,835 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:08:06,836 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:08:06,836 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:08:06,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:08:06,836 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:08:06,836 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:08:06,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:08:06,837 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:08:06,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:08:06,838 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:08:06,838 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:08:06,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:08:06,838 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:08:06,839 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:08:06,839 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:08:07,286 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:08:07,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:08:07,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:08:07,332 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:08:07,333 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:08:07,334 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2021-02-21 16:08:07,441 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0eba8be91/5543d016293e4ccf9088ae21d9f9071d/FLAG67af7fa6f [2021-02-21 16:08:08,287 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:08:08,289 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c [2021-02-21 16:08:08,306 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0eba8be91/5543d016293e4ccf9088ae21d9f9071d/FLAG67af7fa6f [2021-02-21 16:08:08,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0eba8be91/5543d016293e4ccf9088ae21d9f9071d [2021-02-21 16:08:08,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:08:08,591 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:08:08,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:08:08,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:08:08,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:08:08,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:08:08" (1/1) ... [2021-02-21 16:08:08,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f59d6fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:08, skipping insertion in model container [2021-02-21 16:08:08,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:08:08" (1/1) ... [2021-02-21 16:08:08,612 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:08:08,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:08:08,843 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_11.c[4246,4259] [2021-02-21 16:08:08,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:08:08,863 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:08:08,900 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_11.c[4246,4259] [2021-02-21 16:08:08,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:08:08,934 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:08:08,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:08 WrapperNode [2021-02-21 16:08:08,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:08:08,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:08:08,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:08:08,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:08:08,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:08" (1/1) ... [2021-02-21 16:08:08,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:08" (1/1) ... [2021-02-21 16:08:08,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:08" (1/1) ... [2021-02-21 16:08:08,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:08" (1/1) ... [2021-02-21 16:08:08,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:08" (1/1) ... [2021-02-21 16:08:08,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:08" (1/1) ... [2021-02-21 16:08:08,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:08" (1/1) ... [2021-02-21 16:08:08,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:08:08,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:08:08,998 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:08:08,998 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:08:09,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:08:09,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:08:09,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:08:09,135 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:08:09,135 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:08:09,135 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:08:09,136 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:08:09,136 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:08:09,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:08:09,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 16:08:09,138 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:08:09,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:08:09,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:08:09,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:08:09,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:08:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:08:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:08:09,753 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:08:09,754 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 16:08:09,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:08:09 BoogieIcfgContainer [2021-02-21 16:08:09,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:08:09,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:08:09,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:08:09,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:08:09,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:08:08" (1/3) ... [2021-02-21 16:08:09,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dd04aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:08:09, skipping insertion in model container [2021-02-21 16:08:09,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:08" (2/3) ... [2021-02-21 16:08:09,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dd04aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:08:09, skipping insertion in model container [2021-02-21 16:08:09,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:08:09" (3/3) ... [2021-02-21 16:08:09,772 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2021-02-21 16:08:09,782 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:08:09,788 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:08:09,814 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:08:09,867 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:08:09,867 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:08:09,868 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:08:09,868 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:08:09,868 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:08:09,868 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:08:09,868 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:08:09,869 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:08:09,895 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2021-02-21 16:08:09,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-21 16:08:09,903 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:09,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:09,905 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:09,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:09,914 INFO L82 PathProgramCache]: Analyzing trace with hash 284629267, now seen corresponding path program 1 times [2021-02-21 16:08:09,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:09,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758373782] [2021-02-21 16:08:09,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:10,343 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:10,345 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:10,348 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:10,349 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:10,372 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:10,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:10,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:10,493 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:10,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:10,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758373782] [2021-02-21 16:08:10,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:10,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:10,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476951062] [2021-02-21 16:08:10,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:10,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:10,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:10,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:10,539 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 4 states. [2021-02-21 16:08:10,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:10,848 INFO L93 Difference]: Finished difference Result 94 states and 163 transitions. [2021-02-21 16:08:10,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:10,851 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-21 16:08:10,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:10,866 INFO L225 Difference]: With dead ends: 94 [2021-02-21 16:08:10,866 INFO L226 Difference]: Without dead ends: 79 [2021-02-21 16:08:10,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:10,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-02-21 16:08:10,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 55. [2021-02-21 16:08:10,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-02-21 16:08:10,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 98 transitions. [2021-02-21 16:08:10,931 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 98 transitions. Word has length 22 [2021-02-21 16:08:10,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:10,932 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 98 transitions. [2021-02-21 16:08:10,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:10,933 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 98 transitions. [2021-02-21 16:08:10,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-21 16:08:10,934 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:10,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:10,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:08:10,935 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:10,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:10,937 INFO L82 PathProgramCache]: Analyzing trace with hash -726487983, now seen corresponding path program 1 times [2021-02-21 16:08:10,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:10,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962608652] [2021-02-21 16:08:10,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:11,023 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:11,024 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:11,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:11,026 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:11,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:11,032 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:11,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:11,075 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:11,076 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:11,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962608652] [2021-02-21 16:08:11,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:11,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:11,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876539760] [2021-02-21 16:08:11,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:11,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:11,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:11,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:11,086 INFO L87 Difference]: Start difference. First operand 55 states and 98 transitions. Second operand 4 states. [2021-02-21 16:08:11,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:11,301 INFO L93 Difference]: Finished difference Result 128 states and 233 transitions. [2021-02-21 16:08:11,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:11,302 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-21 16:08:11,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:11,304 INFO L225 Difference]: With dead ends: 128 [2021-02-21 16:08:11,304 INFO L226 Difference]: Without dead ends: 79 [2021-02-21 16:08:11,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:11,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-02-21 16:08:11,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2021-02-21 16:08:11,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-02-21 16:08:11,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 138 transitions. [2021-02-21 16:08:11,321 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 138 transitions. Word has length 22 [2021-02-21 16:08:11,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:11,322 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 138 transitions. [2021-02-21 16:08:11,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:11,322 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 138 transitions. [2021-02-21 16:08:11,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-21 16:08:11,323 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:11,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:11,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:08:11,324 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:11,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:11,325 INFO L82 PathProgramCache]: Analyzing trace with hash 233785744, now seen corresponding path program 1 times [2021-02-21 16:08:11,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:11,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103303837] [2021-02-21 16:08:11,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:11,372 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:11,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:11,374 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:11,374 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:11,378 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:11,379 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:11,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:11,413 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:11,415 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:11,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:11,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103303837] [2021-02-21 16:08:11,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:11,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:11,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567980371] [2021-02-21 16:08:11,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:11,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:11,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:11,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:11,429 INFO L87 Difference]: Start difference. First operand 77 states and 138 transitions. Second operand 4 states. [2021-02-21 16:08:11,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:11,644 INFO L93 Difference]: Finished difference Result 118 states and 208 transitions. [2021-02-21 16:08:11,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:11,645 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-21 16:08:11,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:11,652 INFO L225 Difference]: With dead ends: 118 [2021-02-21 16:08:11,653 INFO L226 Difference]: Without dead ends: 82 [2021-02-21 16:08:11,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:11,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-02-21 16:08:11,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-02-21 16:08:11,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-02-21 16:08:11,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 140 transitions. [2021-02-21 16:08:11,685 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 140 transitions. Word has length 23 [2021-02-21 16:08:11,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:11,686 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 140 transitions. [2021-02-21 16:08:11,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:11,686 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 140 transitions. [2021-02-21 16:08:11,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-21 16:08:11,687 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:11,687 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:11,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 16:08:11,688 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:11,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:11,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1046077934, now seen corresponding path program 1 times [2021-02-21 16:08:11,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:11,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271048597] [2021-02-21 16:08:11,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:11,730 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:11,731 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:11,732 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:11,733 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:11,736 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:11,737 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:11,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:11,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:11,774 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:11,775 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:11,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271048597] [2021-02-21 16:08:11,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:11,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:11,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764879333] [2021-02-21 16:08:11,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:11,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:11,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:11,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:11,783 INFO L87 Difference]: Start difference. First operand 80 states and 140 transitions. Second operand 4 states. [2021-02-21 16:08:11,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:11,973 INFO L93 Difference]: Finished difference Result 220 states and 396 transitions. [2021-02-21 16:08:11,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:11,973 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-21 16:08:11,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:11,976 INFO L225 Difference]: With dead ends: 220 [2021-02-21 16:08:11,976 INFO L226 Difference]: Without dead ends: 149 [2021-02-21 16:08:11,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:11,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-02-21 16:08:11,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2021-02-21 16:08:11,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2021-02-21 16:08:11,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 261 transitions. [2021-02-21 16:08:11,990 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 261 transitions. Word has length 23 [2021-02-21 16:08:11,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:11,991 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 261 transitions. [2021-02-21 16:08:11,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:11,991 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 261 transitions. [2021-02-21 16:08:11,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-21 16:08:11,992 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:11,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:11,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 16:08:11,993 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:11,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:11,994 INFO L82 PathProgramCache]: Analyzing trace with hash -34960684, now seen corresponding path program 1 times [2021-02-21 16:08:11,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:11,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370694862] [2021-02-21 16:08:11,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:12,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:12,039 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:12,041 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:12,044 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:12,045 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:12,050 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:12,051 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:12,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:12,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:12,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:12,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370694862] [2021-02-21 16:08:12,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:12,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:12,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157712539] [2021-02-21 16:08:12,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:12,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:12,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:12,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:12,153 INFO L87 Difference]: Start difference. First operand 147 states and 261 transitions. Second operand 4 states. [2021-02-21 16:08:12,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:12,327 INFO L93 Difference]: Finished difference Result 191 states and 339 transitions. [2021-02-21 16:08:12,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:12,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-21 16:08:12,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:12,330 INFO L225 Difference]: With dead ends: 191 [2021-02-21 16:08:12,330 INFO L226 Difference]: Without dead ends: 189 [2021-02-21 16:08:12,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:12,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-02-21 16:08:12,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 147. [2021-02-21 16:08:12,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2021-02-21 16:08:12,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 259 transitions. [2021-02-21 16:08:12,343 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 259 transitions. Word has length 23 [2021-02-21 16:08:12,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:12,343 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 259 transitions. [2021-02-21 16:08:12,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:12,344 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 259 transitions. [2021-02-21 16:08:12,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-21 16:08:12,348 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:12,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:12,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 16:08:12,349 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:12,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:12,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1931535814, now seen corresponding path program 1 times [2021-02-21 16:08:12,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:12,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389299031] [2021-02-21 16:08:12,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:12,417 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:12,420 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:12,421 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:12,423 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:12,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:12,427 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:12,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:12,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:12,471 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:12,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389299031] [2021-02-21 16:08:12,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:12,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:12,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029946157] [2021-02-21 16:08:12,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:12,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:12,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:12,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:12,477 INFO L87 Difference]: Start difference. First operand 147 states and 259 transitions. Second operand 4 states. [2021-02-21 16:08:12,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:12,641 INFO L93 Difference]: Finished difference Result 275 states and 491 transitions. [2021-02-21 16:08:12,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:12,642 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-21 16:08:12,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:12,644 INFO L225 Difference]: With dead ends: 275 [2021-02-21 16:08:12,644 INFO L226 Difference]: Without dead ends: 273 [2021-02-21 16:08:12,645 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 [2021-02-21 16:08:12,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-02-21 16:08:12,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 199. [2021-02-21 16:08:12,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2021-02-21 16:08:12,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 349 transitions. [2021-02-21 16:08:12,658 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 349 transitions. Word has length 24 [2021-02-21 16:08:12,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:12,659 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 349 transitions. [2021-02-21 16:08:12,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:12,659 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 349 transitions. [2021-02-21 16:08:12,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-21 16:08:12,661 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:12,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:12,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 16:08:12,661 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:12,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:12,662 INFO L82 PathProgramCache]: Analyzing trace with hash 920418564, now seen corresponding path program 1 times [2021-02-21 16:08:12,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:12,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033792213] [2021-02-21 16:08:12,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:12,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:12,688 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:12,689 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:12,690 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:12,693 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:12,693 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:12,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:12,719 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:12,719 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:12,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033792213] [2021-02-21 16:08:12,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:12,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:12,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146859558] [2021-02-21 16:08:12,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:12,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:12,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:12,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:12,724 INFO L87 Difference]: Start difference. First operand 199 states and 349 transitions. Second operand 4 states. [2021-02-21 16:08:12,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:12,873 INFO L93 Difference]: Finished difference Result 471 states and 835 transitions. [2021-02-21 16:08:12,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:12,874 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-21 16:08:12,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:12,876 INFO L225 Difference]: With dead ends: 471 [2021-02-21 16:08:12,876 INFO L226 Difference]: Without dead ends: 281 [2021-02-21 16:08:12,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:12,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-02-21 16:08:12,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 279. [2021-02-21 16:08:12,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2021-02-21 16:08:12,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 487 transitions. [2021-02-21 16:08:12,892 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 487 transitions. Word has length 24 [2021-02-21 16:08:12,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:12,893 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 487 transitions. [2021-02-21 16:08:12,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:12,893 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 487 transitions. [2021-02-21 16:08:12,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-21 16:08:12,895 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:12,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:12,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 16:08:12,895 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:12,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:12,896 INFO L82 PathProgramCache]: Analyzing trace with hash -251718169, now seen corresponding path program 1 times [2021-02-21 16:08:12,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:12,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191994749] [2021-02-21 16:08:12,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:12,921 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:12,921 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:12,922 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:12,923 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:12,926 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:12,926 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:12,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:12,970 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:12,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:12,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:12,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191994749] [2021-02-21 16:08:12,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:12,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:12,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092989986] [2021-02-21 16:08:12,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:12,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:12,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:12,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:12,975 INFO L87 Difference]: Start difference. First operand 279 states and 487 transitions. Second operand 4 states. [2021-02-21 16:08:13,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:13,113 INFO L93 Difference]: Finished difference Result 421 states and 733 transitions. [2021-02-21 16:08:13,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:13,113 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-21 16:08:13,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:13,116 INFO L225 Difference]: With dead ends: 421 [2021-02-21 16:08:13,116 INFO L226 Difference]: Without dead ends: 287 [2021-02-21 16:08:13,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:13,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-02-21 16:08:13,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 285. [2021-02-21 16:08:13,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2021-02-21 16:08:13,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 491 transitions. [2021-02-21 16:08:13,134 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 491 transitions. Word has length 25 [2021-02-21 16:08:13,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:13,134 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 491 transitions. [2021-02-21 16:08:13,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:13,134 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 491 transitions. [2021-02-21 16:08:13,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-21 16:08:13,136 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:13,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:13,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 16:08:13,137 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:13,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:13,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1531581847, now seen corresponding path program 1 times [2021-02-21 16:08:13,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:13,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337312887] [2021-02-21 16:08:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:13,161 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:13,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:13,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:13,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:13,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:13,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:13,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:13,191 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:13,192 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:13,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337312887] [2021-02-21 16:08:13,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:13,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:13,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192604800] [2021-02-21 16:08:13,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:13,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:13,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:13,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:13,196 INFO L87 Difference]: Start difference. First operand 285 states and 491 transitions. Second operand 4 states. [2021-02-21 16:08:13,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:13,340 INFO L93 Difference]: Finished difference Result 525 states and 917 transitions. [2021-02-21 16:08:13,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:13,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-21 16:08:13,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:13,345 INFO L225 Difference]: With dead ends: 525 [2021-02-21 16:08:13,345 INFO L226 Difference]: Without dead ends: 523 [2021-02-21 16:08:13,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:13,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-02-21 16:08:13,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 393. [2021-02-21 16:08:13,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2021-02-21 16:08:13,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 667 transitions. [2021-02-21 16:08:13,365 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 667 transitions. Word has length 25 [2021-02-21 16:08:13,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:13,365 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 667 transitions. [2021-02-21 16:08:13,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:13,365 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 667 transitions. [2021-02-21 16:08:13,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-21 16:08:13,367 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:13,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:13,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 16:08:13,367 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:13,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:13,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1752268199, now seen corresponding path program 1 times [2021-02-21 16:08:13,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:13,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389654359] [2021-02-21 16:08:13,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:13,402 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:13,403 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:13,403 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:13,404 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:13,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:13,407 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:13,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:13,465 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:13,467 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:13,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389654359] [2021-02-21 16:08:13,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:13,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:13,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238870004] [2021-02-21 16:08:13,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:13,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:13,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:13,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:13,472 INFO L87 Difference]: Start difference. First operand 393 states and 667 transitions. Second operand 4 states. [2021-02-21 16:08:13,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:13,622 INFO L93 Difference]: Finished difference Result 925 states and 1581 transitions. [2021-02-21 16:08:13,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:13,623 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-21 16:08:13,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:13,627 INFO L225 Difference]: With dead ends: 925 [2021-02-21 16:08:13,627 INFO L226 Difference]: Without dead ends: 547 [2021-02-21 16:08:13,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:13,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-02-21 16:08:13,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 545. [2021-02-21 16:08:13,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2021-02-21 16:08:13,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 919 transitions. [2021-02-21 16:08:13,677 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 919 transitions. Word has length 25 [2021-02-21 16:08:13,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:13,678 INFO L480 AbstractCegarLoop]: Abstraction has 545 states and 919 transitions. [2021-02-21 16:08:13,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:13,678 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 919 transitions. [2021-02-21 16:08:13,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-21 16:08:13,682 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:13,682 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:13,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 16:08:13,683 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:13,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:13,683 INFO L82 PathProgramCache]: Analyzing trace with hash -234182919, now seen corresponding path program 1 times [2021-02-21 16:08:13,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:13,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108886122] [2021-02-21 16:08:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:13,741 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:13,742 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:13,742 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:13,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:13,746 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:13,746 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:13,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:13,772 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:13,773 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:13,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108886122] [2021-02-21 16:08:13,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:13,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:13,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747377395] [2021-02-21 16:08:13,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:13,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:13,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:13,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:13,777 INFO L87 Difference]: Start difference. First operand 545 states and 919 transitions. Second operand 4 states. [2021-02-21 16:08:13,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:13,930 INFO L93 Difference]: Finished difference Result 817 states and 1373 transitions. [2021-02-21 16:08:13,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:13,930 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-02-21 16:08:13,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:13,934 INFO L225 Difference]: With dead ends: 817 [2021-02-21 16:08:13,935 INFO L226 Difference]: Without dead ends: 555 [2021-02-21 16:08:13,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:13,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-02-21 16:08:13,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 553. [2021-02-21 16:08:13,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2021-02-21 16:08:13,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 919 transitions. [2021-02-21 16:08:13,962 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 919 transitions. Word has length 26 [2021-02-21 16:08:13,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:13,962 INFO L480 AbstractCegarLoop]: Abstraction has 553 states and 919 transitions. [2021-02-21 16:08:13,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:13,962 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 919 transitions. [2021-02-21 16:08:13,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-21 16:08:13,963 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:13,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:13,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-21 16:08:13,964 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:13,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:13,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1514046597, now seen corresponding path program 1 times [2021-02-21 16:08:13,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:13,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330452397] [2021-02-21 16:08:13,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:13,989 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:13,990 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:13,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:13,991 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:13,995 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:13,995 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:14,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:14,024 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:14,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:14,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330452397] [2021-02-21 16:08:14,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:14,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:14,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937311173] [2021-02-21 16:08:14,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:14,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:14,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:14,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:14,029 INFO L87 Difference]: Start difference. First operand 553 states and 919 transitions. Second operand 4 states. [2021-02-21 16:08:14,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:14,179 INFO L93 Difference]: Finished difference Result 1005 states and 1697 transitions. [2021-02-21 16:08:14,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:14,179 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-02-21 16:08:14,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:14,186 INFO L225 Difference]: With dead ends: 1005 [2021-02-21 16:08:14,186 INFO L226 Difference]: Without dead ends: 1003 [2021-02-21 16:08:14,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:14,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2021-02-21 16:08:14,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 777. [2021-02-21 16:08:14,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 777 states. [2021-02-21 16:08:14,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1263 transitions. [2021-02-21 16:08:14,222 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1263 transitions. Word has length 26 [2021-02-21 16:08:14,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:14,223 INFO L480 AbstractCegarLoop]: Abstraction has 777 states and 1263 transitions. [2021-02-21 16:08:14,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:14,223 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1263 transitions. [2021-02-21 16:08:14,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-21 16:08:14,225 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:14,225 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, 1, 1, 1, 1] [2021-02-21 16:08:14,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-21 16:08:14,225 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:14,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:14,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1769803449, now seen corresponding path program 1 times [2021-02-21 16:08:14,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:14,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005372824] [2021-02-21 16:08:14,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:14,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:14,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:14,250 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:14,250 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:14,253 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:14,253 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:14,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:14,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:14,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:14,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:14,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005372824] [2021-02-21 16:08:14,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:14,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:14,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754001025] [2021-02-21 16:08:14,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:14,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:14,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:14,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:14,283 INFO L87 Difference]: Start difference. First operand 777 states and 1263 transitions. Second operand 4 states. [2021-02-21 16:08:14,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:14,463 INFO L93 Difference]: Finished difference Result 1821 states and 2977 transitions. [2021-02-21 16:08:14,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:14,464 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-02-21 16:08:14,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:14,470 INFO L225 Difference]: With dead ends: 1821 [2021-02-21 16:08:14,471 INFO L226 Difference]: Without dead ends: 1067 [2021-02-21 16:08:14,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:14,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-02-21 16:08:14,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1065. [2021-02-21 16:08:14,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2021-02-21 16:08:14,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1719 transitions. [2021-02-21 16:08:14,519 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1719 transitions. Word has length 26 [2021-02-21 16:08:14,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:14,520 INFO L480 AbstractCegarLoop]: Abstraction has 1065 states and 1719 transitions. [2021-02-21 16:08:14,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:14,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1719 transitions. [2021-02-21 16:08:14,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-21 16:08:14,522 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:14,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:14,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-21 16:08:14,523 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:14,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:14,523 INFO L82 PathProgramCache]: Analyzing trace with hash 309410172, now seen corresponding path program 1 times [2021-02-21 16:08:14,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:14,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052868896] [2021-02-21 16:08:14,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:14,546 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:14,548 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:14,549 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:14,549 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:14,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:14,553 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:14,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:14,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:14,584 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:14,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052868896] [2021-02-21 16:08:14,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:14,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:14,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721158147] [2021-02-21 16:08:14,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:14,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:14,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:14,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:14,590 INFO L87 Difference]: Start difference. First operand 1065 states and 1719 transitions. Second operand 4 states. [2021-02-21 16:08:14,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:14,734 INFO L93 Difference]: Finished difference Result 1597 states and 2569 transitions. [2021-02-21 16:08:14,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:14,735 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2021-02-21 16:08:14,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:14,741 INFO L225 Difference]: With dead ends: 1597 [2021-02-21 16:08:14,741 INFO L226 Difference]: Without dead ends: 1083 [2021-02-21 16:08:14,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:14,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-02-21 16:08:14,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1081. [2021-02-21 16:08:14,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1081 states. [2021-02-21 16:08:14,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1719 transitions. [2021-02-21 16:08:14,785 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1719 transitions. Word has length 27 [2021-02-21 16:08:14,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:14,786 INFO L480 AbstractCegarLoop]: Abstraction has 1081 states and 1719 transitions. [2021-02-21 16:08:14,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:14,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1719 transitions. [2021-02-21 16:08:14,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-21 16:08:14,788 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:14,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:14,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-21 16:08:14,788 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:14,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:14,789 INFO L82 PathProgramCache]: Analyzing trace with hash -970453506, now seen corresponding path program 1 times [2021-02-21 16:08:14,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:14,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663571926] [2021-02-21 16:08:14,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:14,811 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:14,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:14,812 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:14,812 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:14,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:14,816 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:14,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:14,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:14,839 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:14,839 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:14,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663571926] [2021-02-21 16:08:14,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:14,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:14,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974147734] [2021-02-21 16:08:14,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:14,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:14,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:14,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:14,843 INFO L87 Difference]: Start difference. First operand 1081 states and 1719 transitions. Second operand 4 states. [2021-02-21 16:08:15,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:15,033 INFO L93 Difference]: Finished difference Result 1933 states and 3129 transitions. [2021-02-21 16:08:15,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:15,034 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2021-02-21 16:08:15,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:15,045 INFO L225 Difference]: With dead ends: 1933 [2021-02-21 16:08:15,045 INFO L226 Difference]: Without dead ends: 1931 [2021-02-21 16:08:15,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:15,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2021-02-21 16:08:15,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1545. [2021-02-21 16:08:15,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1545 states. [2021-02-21 16:08:15,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 2391 transitions. [2021-02-21 16:08:15,125 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 2391 transitions. Word has length 27 [2021-02-21 16:08:15,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:15,125 INFO L480 AbstractCegarLoop]: Abstraction has 1545 states and 2391 transitions. [2021-02-21 16:08:15,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:15,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 2391 transitions. [2021-02-21 16:08:15,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-21 16:08:15,129 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:15,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:15,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-21 16:08:15,129 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:15,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:15,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1981570756, now seen corresponding path program 1 times [2021-02-21 16:08:15,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:15,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146831236] [2021-02-21 16:08:15,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:15,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:15,158 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:15,159 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:15,160 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:15,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:15,163 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:15,164 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:15,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:15,191 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:15,192 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:15,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146831236] [2021-02-21 16:08:15,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:15,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:15,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616653654] [2021-02-21 16:08:15,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:15,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:15,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:15,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:15,197 INFO L87 Difference]: Start difference. First operand 1545 states and 2391 transitions. Second operand 4 states. [2021-02-21 16:08:15,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:15,371 INFO L93 Difference]: Finished difference Result 3597 states and 5593 transitions. [2021-02-21 16:08:15,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:15,372 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2021-02-21 16:08:15,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:15,384 INFO L225 Difference]: With dead ends: 3597 [2021-02-21 16:08:15,384 INFO L226 Difference]: Without dead ends: 2091 [2021-02-21 16:08:15,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:15,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-02-21 16:08:15,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 2089. [2021-02-21 16:08:15,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2089 states. [2021-02-21 16:08:15,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 3207 transitions. [2021-02-21 16:08:15,474 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 3207 transitions. Word has length 27 [2021-02-21 16:08:15,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:15,475 INFO L480 AbstractCegarLoop]: Abstraction has 2089 states and 3207 transitions. [2021-02-21 16:08:15,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:15,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 3207 transitions. [2021-02-21 16:08:15,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-21 16:08:15,478 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:15,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:15,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-21 16:08:15,478 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:15,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:15,479 INFO L82 PathProgramCache]: Analyzing trace with hash -19072850, now seen corresponding path program 1 times [2021-02-21 16:08:15,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:15,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705864531] [2021-02-21 16:08:15,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:15,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:15,500 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:15,501 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:15,502 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:15,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:15,505 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:15,505 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:15,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:15,531 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:15,531 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:15,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705864531] [2021-02-21 16:08:15,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:15,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:15,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26324283] [2021-02-21 16:08:15,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:15,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:15,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:15,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:15,536 INFO L87 Difference]: Start difference. First operand 2089 states and 3207 transitions. Second operand 4 states. [2021-02-21 16:08:15,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:15,721 INFO L93 Difference]: Finished difference Result 3133 states and 4793 transitions. [2021-02-21 16:08:15,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:15,721 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2021-02-21 16:08:15,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:15,733 INFO L225 Difference]: With dead ends: 3133 [2021-02-21 16:08:15,733 INFO L226 Difference]: Without dead ends: 2123 [2021-02-21 16:08:15,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:15,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2021-02-21 16:08:15,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2121. [2021-02-21 16:08:15,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2121 states. [2021-02-21 16:08:15,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 3207 transitions. [2021-02-21 16:08:15,819 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 3207 transitions. Word has length 28 [2021-02-21 16:08:15,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:15,819 INFO L480 AbstractCegarLoop]: Abstraction has 2121 states and 3207 transitions. [2021-02-21 16:08:15,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:15,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 3207 transitions. [2021-02-21 16:08:15,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-21 16:08:15,822 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:15,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:15,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-21 16:08:15,823 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:15,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:15,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1298936528, now seen corresponding path program 1 times [2021-02-21 16:08:15,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:15,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051364050] [2021-02-21 16:08:15,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:15,845 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:15,846 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:15,846 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:15,847 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:15,850 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:15,850 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:15,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:15,874 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:15,875 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:15,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051364050] [2021-02-21 16:08:15,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:15,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:15,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597996856] [2021-02-21 16:08:15,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:15,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:15,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:15,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:15,879 INFO L87 Difference]: Start difference. First operand 2121 states and 3207 transitions. Second operand 4 states. [2021-02-21 16:08:16,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:16,070 INFO L93 Difference]: Finished difference Result 3725 states and 5737 transitions. [2021-02-21 16:08:16,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:16,070 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2021-02-21 16:08:16,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:16,092 INFO L225 Difference]: With dead ends: 3725 [2021-02-21 16:08:16,092 INFO L226 Difference]: Without dead ends: 3723 [2021-02-21 16:08:16,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:16,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2021-02-21 16:08:16,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 3081. [2021-02-21 16:08:16,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3081 states. [2021-02-21 16:08:16,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 4519 transitions. [2021-02-21 16:08:16,211 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 4519 transitions. Word has length 28 [2021-02-21 16:08:16,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:16,211 INFO L480 AbstractCegarLoop]: Abstraction has 3081 states and 4519 transitions. [2021-02-21 16:08:16,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:16,211 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 4519 transitions. [2021-02-21 16:08:16,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-21 16:08:16,217 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:16,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:16,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-02-21 16:08:16,217 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:16,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:16,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1984913518, now seen corresponding path program 1 times [2021-02-21 16:08:16,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:16,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918532540] [2021-02-21 16:08:16,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:16,237 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:16,238 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:16,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:16,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:16,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:16,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:16,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:16,304 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:16,304 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:16,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918532540] [2021-02-21 16:08:16,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:16,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:16,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202831594] [2021-02-21 16:08:16,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:16,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:16,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:16,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:16,308 INFO L87 Difference]: Start difference. First operand 3081 states and 4519 transitions. Second operand 4 states. [2021-02-21 16:08:16,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:16,521 INFO L93 Difference]: Finished difference Result 7117 states and 10473 transitions. [2021-02-21 16:08:16,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:16,521 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2021-02-21 16:08:16,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:16,545 INFO L225 Difference]: With dead ends: 7117 [2021-02-21 16:08:16,545 INFO L226 Difference]: Without dead ends: 4107 [2021-02-21 16:08:16,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:16,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2021-02-21 16:08:16,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 4105. [2021-02-21 16:08:16,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4105 states. [2021-02-21 16:08:16,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 5959 transitions. [2021-02-21 16:08:16,717 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 5959 transitions. Word has length 28 [2021-02-21 16:08:16,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:16,718 INFO L480 AbstractCegarLoop]: Abstraction has 4105 states and 5959 transitions. [2021-02-21 16:08:16,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:16,718 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 5959 transitions. [2021-02-21 16:08:16,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-21 16:08:16,723 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:16,723 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:16,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-02-21 16:08:16,723 INFO L428 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:16,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:16,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1612111599, now seen corresponding path program 1 times [2021-02-21 16:08:16,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:16,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442939522] [2021-02-21 16:08:16,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:16,742 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:16,742 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:16,743 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:16,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:16,747 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:16,747 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:16,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:16,771 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:16,771 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:16,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442939522] [2021-02-21 16:08:16,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:16,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:16,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614140350] [2021-02-21 16:08:16,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:16,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:16,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:16,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:16,775 INFO L87 Difference]: Start difference. First operand 4105 states and 5959 transitions. Second operand 4 states. [2021-02-21 16:08:16,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:16,994 INFO L93 Difference]: Finished difference Result 6157 states and 8905 transitions. [2021-02-21 16:08:16,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:16,994 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-02-21 16:08:16,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:17,016 INFO L225 Difference]: With dead ends: 6157 [2021-02-21 16:08:17,016 INFO L226 Difference]: Without dead ends: 4171 [2021-02-21 16:08:17,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:17,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4171 states. [2021-02-21 16:08:17,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4171 to 4169. [2021-02-21 16:08:17,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4169 states. [2021-02-21 16:08:17,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4169 states to 4169 states and 5959 transitions. [2021-02-21 16:08:17,173 INFO L78 Accepts]: Start accepts. Automaton has 4169 states and 5959 transitions. Word has length 29 [2021-02-21 16:08:17,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:17,173 INFO L480 AbstractCegarLoop]: Abstraction has 4169 states and 5959 transitions. [2021-02-21 16:08:17,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:17,173 INFO L276 IsEmpty]: Start isEmpty. Operand 4169 states and 5959 transitions. [2021-02-21 16:08:17,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-21 16:08:17,179 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:17,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:17,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-02-21 16:08:17,179 INFO L428 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:17,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:17,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1402992019, now seen corresponding path program 1 times [2021-02-21 16:08:17,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:17,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576128090] [2021-02-21 16:08:17,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:17,196 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:17,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:17,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:17,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:17,200 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:17,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:17,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:17,224 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:17,225 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:17,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576128090] [2021-02-21 16:08:17,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:17,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:17,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390934695] [2021-02-21 16:08:17,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:17,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:17,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:17,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:17,229 INFO L87 Difference]: Start difference. First operand 4169 states and 5959 transitions. Second operand 4 states. [2021-02-21 16:08:17,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:17,539 INFO L93 Difference]: Finished difference Result 7181 states and 10441 transitions. [2021-02-21 16:08:17,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:17,540 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-02-21 16:08:17,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:17,560 INFO L225 Difference]: With dead ends: 7181 [2021-02-21 16:08:17,561 INFO L226 Difference]: Without dead ends: 7179 [2021-02-21 16:08:17,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:17,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7179 states. [2021-02-21 16:08:17,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7179 to 6153. [2021-02-21 16:08:17,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6153 states. [2021-02-21 16:08:17,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 8519 transitions. [2021-02-21 16:08:17,789 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 8519 transitions. Word has length 29 [2021-02-21 16:08:17,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:17,789 INFO L480 AbstractCegarLoop]: Abstraction has 6153 states and 8519 transitions. [2021-02-21 16:08:17,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:17,790 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 8519 transitions. [2021-02-21 16:08:17,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-21 16:08:17,800 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:17,800 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:17,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-02-21 16:08:17,800 INFO L428 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:17,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:17,801 INFO L82 PathProgramCache]: Analyzing trace with hash 391874769, now seen corresponding path program 1 times [2021-02-21 16:08:17,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:17,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352978301] [2021-02-21 16:08:17,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:17,819 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:17,820 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:17,821 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:17,821 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:17,824 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:17,824 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:17,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:17,846 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:17,846 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:17,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352978301] [2021-02-21 16:08:17,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:17,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:17,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205375222] [2021-02-21 16:08:17,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:17,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:17,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:17,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:17,850 INFO L87 Difference]: Start difference. First operand 6153 states and 8519 transitions. Second operand 4 states. [2021-02-21 16:08:18,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:18,164 INFO L93 Difference]: Finished difference Result 14093 states and 19529 transitions. [2021-02-21 16:08:18,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:18,168 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-02-21 16:08:18,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:18,188 INFO L225 Difference]: With dead ends: 14093 [2021-02-21 16:08:18,188 INFO L226 Difference]: Without dead ends: 8075 [2021-02-21 16:08:18,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:18,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8075 states. [2021-02-21 16:08:18,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8075 to 8073. [2021-02-21 16:08:18,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8073 states. [2021-02-21 16:08:18,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8073 states to 8073 states and 11015 transitions. [2021-02-21 16:08:18,462 INFO L78 Accepts]: Start accepts. Automaton has 8073 states and 11015 transitions. Word has length 29 [2021-02-21 16:08:18,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:18,462 INFO L480 AbstractCegarLoop]: Abstraction has 8073 states and 11015 transitions. [2021-02-21 16:08:18,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:18,462 INFO L276 IsEmpty]: Start isEmpty. Operand 8073 states and 11015 transitions. [2021-02-21 16:08:18,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-21 16:08:18,473 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:18,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:18,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-02-21 16:08:18,473 INFO L428 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:18,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:18,474 INFO L82 PathProgramCache]: Analyzing trace with hash 543295075, now seen corresponding path program 1 times [2021-02-21 16:08:18,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:18,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486172622] [2021-02-21 16:08:18,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:18,498 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:18,498 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:18,499 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:18,499 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:18,502 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:18,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:18,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:18,524 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:18,525 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:18,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:18,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486172622] [2021-02-21 16:08:18,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:18,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:18,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060174463] [2021-02-21 16:08:18,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:18,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:18,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:18,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:18,529 INFO L87 Difference]: Start difference. First operand 8073 states and 11015 transitions. Second operand 4 states. [2021-02-21 16:08:18,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:18,819 INFO L93 Difference]: Finished difference Result 12109 states and 16457 transitions. [2021-02-21 16:08:18,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:18,820 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2021-02-21 16:08:18,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:18,838 INFO L225 Difference]: With dead ends: 12109 [2021-02-21 16:08:18,838 INFO L226 Difference]: Without dead ends: 8203 [2021-02-21 16:08:18,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:18,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8203 states. [2021-02-21 16:08:19,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8203 to 8201. [2021-02-21 16:08:19,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8201 states. [2021-02-21 16:08:19,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8201 states to 8201 states and 11015 transitions. [2021-02-21 16:08:19,093 INFO L78 Accepts]: Start accepts. Automaton has 8201 states and 11015 transitions. Word has length 30 [2021-02-21 16:08:19,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:19,093 INFO L480 AbstractCegarLoop]: Abstraction has 8201 states and 11015 transitions. [2021-02-21 16:08:19,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:19,095 INFO L276 IsEmpty]: Start isEmpty. Operand 8201 states and 11015 transitions. [2021-02-21 16:08:19,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-21 16:08:19,106 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:19,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:19,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-02-21 16:08:19,107 INFO L428 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:19,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:19,107 INFO L82 PathProgramCache]: Analyzing trace with hash -736568603, now seen corresponding path program 1 times [2021-02-21 16:08:19,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:19,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147447372] [2021-02-21 16:08:19,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:19,138 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:19,139 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:19,139 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:19,139 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:19,142 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:19,143 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:19,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:19,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:19,225 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:19,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147447372] [2021-02-21 16:08:19,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:19,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:19,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448277731] [2021-02-21 16:08:19,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:19,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:19,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:19,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:19,231 INFO L87 Difference]: Start difference. First operand 8201 states and 11015 transitions. Second operand 4 states. [2021-02-21 16:08:19,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:19,580 INFO L93 Difference]: Finished difference Result 13837 states and 18825 transitions. [2021-02-21 16:08:19,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:19,581 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2021-02-21 16:08:19,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:19,614 INFO L225 Difference]: With dead ends: 13837 [2021-02-21 16:08:19,615 INFO L226 Difference]: Without dead ends: 13835 [2021-02-21 16:08:19,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:19,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13835 states. [2021-02-21 16:08:20,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13835 to 12297. [2021-02-21 16:08:20,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12297 states. [2021-02-21 16:08:20,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12297 states to 12297 states and 16007 transitions. [2021-02-21 16:08:20,047 INFO L78 Accepts]: Start accepts. Automaton has 12297 states and 16007 transitions. Word has length 30 [2021-02-21 16:08:20,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:20,047 INFO L480 AbstractCegarLoop]: Abstraction has 12297 states and 16007 transitions. [2021-02-21 16:08:20,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:20,047 INFO L276 IsEmpty]: Start isEmpty. Operand 12297 states and 16007 transitions. [2021-02-21 16:08:20,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-21 16:08:20,069 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:20,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:20,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-02-21 16:08:20,070 INFO L428 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:20,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:20,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1747685853, now seen corresponding path program 1 times [2021-02-21 16:08:20,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:20,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347872163] [2021-02-21 16:08:20,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:20,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:20,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:20,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:20,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:20,094 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:20,095 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:20,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:20,119 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:20,120 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:20,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:20,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347872163] [2021-02-21 16:08:20,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:20,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:20,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017001354] [2021-02-21 16:08:20,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:20,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:20,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:20,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:20,125 INFO L87 Difference]: Start difference. First operand 12297 states and 16007 transitions. Second operand 4 states. [2021-02-21 16:08:20,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:20,545 INFO L93 Difference]: Finished difference Result 27917 states and 36233 transitions. [2021-02-21 16:08:20,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:20,546 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2021-02-21 16:08:20,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:20,585 INFO L225 Difference]: With dead ends: 27917 [2021-02-21 16:08:20,585 INFO L226 Difference]: Without dead ends: 15883 [2021-02-21 16:08:20,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:20,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15883 states. [2021-02-21 16:08:21,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15883 to 15881. [2021-02-21 16:08:21,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15881 states. [2021-02-21 16:08:21,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15881 states to 15881 states and 20231 transitions. [2021-02-21 16:08:21,276 INFO L78 Accepts]: Start accepts. Automaton has 15881 states and 20231 transitions. Word has length 30 [2021-02-21 16:08:21,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:21,276 INFO L480 AbstractCegarLoop]: Abstraction has 15881 states and 20231 transitions. [2021-02-21 16:08:21,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:21,276 INFO L276 IsEmpty]: Start isEmpty. Operand 15881 states and 20231 transitions. [2021-02-21 16:08:21,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-21 16:08:21,297 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:21,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:21,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-02-21 16:08:21,298 INFO L428 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:21,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:21,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1358574426, now seen corresponding path program 1 times [2021-02-21 16:08:21,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:21,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080543932] [2021-02-21 16:08:21,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:21,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:21,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:21,315 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:21,316 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:21,316 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:21,319 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:21,319 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:21,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:21,341 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:21,341 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:21,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:21,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080543932] [2021-02-21 16:08:21,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:21,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:21,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383205715] [2021-02-21 16:08:21,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:21,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:21,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:21,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:21,345 INFO L87 Difference]: Start difference. First operand 15881 states and 20231 transitions. Second operand 4 states. [2021-02-21 16:08:21,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:21,799 INFO L93 Difference]: Finished difference Result 23821 states and 30217 transitions. [2021-02-21 16:08:21,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:21,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2021-02-21 16:08:21,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:21,835 INFO L225 Difference]: With dead ends: 23821 [2021-02-21 16:08:21,835 INFO L226 Difference]: Without dead ends: 16139 [2021-02-21 16:08:21,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:21,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16139 states. [2021-02-21 16:08:22,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16139 to 16137. [2021-02-21 16:08:22,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16137 states. [2021-02-21 16:08:22,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16137 states to 16137 states and 20231 transitions. [2021-02-21 16:08:22,337 INFO L78 Accepts]: Start accepts. Automaton has 16137 states and 20231 transitions. Word has length 31 [2021-02-21 16:08:22,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:22,337 INFO L480 AbstractCegarLoop]: Abstraction has 16137 states and 20231 transitions. [2021-02-21 16:08:22,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:22,337 INFO L276 IsEmpty]: Start isEmpty. Operand 16137 states and 20231 transitions. [2021-02-21 16:08:22,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-21 16:08:22,361 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:22,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:22,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-02-21 16:08:22,361 INFO L428 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:22,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:22,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1656529192, now seen corresponding path program 1 times [2021-02-21 16:08:22,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:22,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791732307] [2021-02-21 16:08:22,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:22,383 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:22,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:22,384 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:22,384 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:22,387 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:22,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:22,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:22,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:22,409 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:22,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791732307] [2021-02-21 16:08:22,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:22,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:22,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240183235] [2021-02-21 16:08:22,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:22,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:22,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:22,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:22,412 INFO L87 Difference]: Start difference. First operand 16137 states and 20231 transitions. Second operand 4 states. [2021-02-21 16:08:22,564 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-02-21 16:08:23,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:23,160 INFO L93 Difference]: Finished difference Result 46861 states and 57609 transitions. [2021-02-21 16:08:23,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:23,161 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2021-02-21 16:08:23,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:23,241 INFO L225 Difference]: With dead ends: 46861 [2021-02-21 16:08:23,241 INFO L226 Difference]: Without dead ends: 31243 [2021-02-21 16:08:23,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:23,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31243 states. [2021-02-21 16:08:24,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31243 to 31241. [2021-02-21 16:08:24,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31241 states. [2021-02-21 16:08:24,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31241 states to 31241 states and 37383 transitions. [2021-02-21 16:08:24,461 INFO L78 Accepts]: Start accepts. Automaton has 31241 states and 37383 transitions. Word has length 31 [2021-02-21 16:08:24,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:24,461 INFO L480 AbstractCegarLoop]: Abstraction has 31241 states and 37383 transitions. [2021-02-21 16:08:24,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:24,462 INFO L276 IsEmpty]: Start isEmpty. Operand 31241 states and 37383 transitions. [2021-02-21 16:08:24,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-21 16:08:24,493 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:24,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:24,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-02-21 16:08:24,494 INFO L428 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:24,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:24,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1627320854, now seen corresponding path program 1 times [2021-02-21 16:08:24,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:24,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619179651] [2021-02-21 16:08:24,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:24,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:24,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:24,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:24,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:24,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:24,515 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:24,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:24,542 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:24,542 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:24,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619179651] [2021-02-21 16:08:24,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:24,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:24,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828853681] [2021-02-21 16:08:24,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:24,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:24,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:24,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:24,546 INFO L87 Difference]: Start difference. First operand 31241 states and 37383 transitions. Second operand 4 states. [2021-02-21 16:08:25,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:25,267 INFO L93 Difference]: Finished difference Result 33293 states and 40457 transitions. [2021-02-21 16:08:25,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:25,268 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2021-02-21 16:08:25,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:25,329 INFO L225 Difference]: With dead ends: 33293 [2021-02-21 16:08:25,329 INFO L226 Difference]: Without dead ends: 33291 [2021-02-21 16:08:25,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:25,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33291 states. [2021-02-21 16:08:26,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33291 to 31241. [2021-02-21 16:08:26,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31241 states. [2021-02-21 16:08:26,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31241 states to 31241 states and 36871 transitions. [2021-02-21 16:08:26,310 INFO L78 Accepts]: Start accepts. Automaton has 31241 states and 36871 transitions. Word has length 31 [2021-02-21 16:08:26,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:26,310 INFO L480 AbstractCegarLoop]: Abstraction has 31241 states and 36871 transitions. [2021-02-21 16:08:26,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:26,310 INFO L276 IsEmpty]: Start isEmpty. Operand 31241 states and 36871 transitions. [2021-02-21 16:08:26,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-21 16:08:26,335 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:26,336 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:26,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-02-21 16:08:26,336 INFO L428 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:26,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:26,337 INFO L82 PathProgramCache]: Analyzing trace with hash -186986472, now seen corresponding path program 1 times [2021-02-21 16:08:26,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:26,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368552857] [2021-02-21 16:08:26,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:26,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,356 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,356 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:26,359 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,360 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:26,383 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,384 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:26,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368552857] [2021-02-21 16:08:26,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:26,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:26,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842004171] [2021-02-21 16:08:26,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:26,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:26,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:26,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:26,389 INFO L87 Difference]: Start difference. First operand 31241 states and 36871 transitions. Second operand 4 states. [2021-02-21 16:08:27,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:27,513 INFO L93 Difference]: Finished difference Result 50699 states and 59400 transitions. [2021-02-21 16:08:27,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:27,514 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2021-02-21 16:08:27,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:27,589 INFO L225 Difference]: With dead ends: 50699 [2021-02-21 16:08:27,589 INFO L226 Difference]: Without dead ends: 50697 [2021-02-21 16:08:27,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:27,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50697 states. [2021-02-21 16:08:28,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50697 to 48649. [2021-02-21 16:08:28,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48649 states. [2021-02-21 16:08:28,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48649 states to 48649 states and 56327 transitions. [2021-02-21 16:08:28,830 INFO L78 Accepts]: Start accepts. Automaton has 48649 states and 56327 transitions. Word has length 32 [2021-02-21 16:08:28,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:28,830 INFO L480 AbstractCegarLoop]: Abstraction has 48649 states and 56327 transitions. [2021-02-21 16:08:28,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:28,830 INFO L276 IsEmpty]: Start isEmpty. Operand 48649 states and 56327 transitions. [2021-02-21 16:08:28,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-21 16:08:28,884 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:28,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:28,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-02-21 16:08:28,884 INFO L428 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:28,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:28,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1198103722, now seen corresponding path program 1 times [2021-02-21 16:08:28,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:28,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118066749] [2021-02-21 16:08:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:28,901 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:28,902 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:28,902 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:28,903 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:28,906 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:28,906 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:28,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:28,927 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:28,928 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:28,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118066749] [2021-02-21 16:08:28,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:28,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:28,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771599414] [2021-02-21 16:08:28,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:28,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:28,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:28,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:28,931 INFO L87 Difference]: Start difference. First operand 48649 states and 56327 transitions. Second operand 4 states. [2021-02-21 16:08:30,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:30,416 INFO L93 Difference]: Finished difference Result 109065 states and 124935 transitions. [2021-02-21 16:08:30,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:30,416 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2021-02-21 16:08:30,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:30,417 INFO L225 Difference]: With dead ends: 109065 [2021-02-21 16:08:30,417 INFO L226 Difference]: Without dead ends: 0 [2021-02-21 16:08:30,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:30,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-21 16:08:30,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-21 16:08:30,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-21 16:08:30,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-21 16:08:30,515 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-02-21 16:08:30,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:30,516 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-21 16:08:30,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:30,516 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-21 16:08:30,516 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-21 16:08:30,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-02-21 16:08:30,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-21 16:12:49,761 WARN L202 SmtUtils]: Spent 4.32 m on a formula simplification. DAG size of input: 8275 DAG size of output: 32 [2021-02-21 16:12:49,801 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-21 16:12:49,801 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-21 16:12:49,802 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-21 16:12:49,802 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-21 16:12:49,803 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-21 16:12:49,803 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-21 16:12:49,803 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-21 16:12:49,803 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 16:12:49,803 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-21 16:12:49,803 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-21 16:12:49,803 INFO L189 CegarLoopUtils]: For program point L159-1(lines 44 174) no Hoare annotation was computed. [2021-02-21 16:12:49,803 INFO L189 CegarLoopUtils]: For program point L93-1(lines 44 174) no Hoare annotation was computed. [2021-02-21 16:12:49,804 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 6 179) no Hoare annotation was computed. [2021-02-21 16:12:49,804 INFO L189 CegarLoopUtils]: For program point L85-1(lines 44 174) no Hoare annotation was computed. [2021-02-21 16:12:49,804 INFO L189 CegarLoopUtils]: For program point L77-1(lines 44 174) no Hoare annotation was computed. [2021-02-21 16:12:49,804 INFO L189 CegarLoopUtils]: For program point L135(line 135) no Hoare annotation was computed. [2021-02-21 16:12:49,804 INFO L189 CegarLoopUtils]: For program point L160(line 160) no Hoare annotation was computed. [2021-02-21 16:12:49,805 INFO L189 CegarLoopUtils]: For program point L119-1(lines 44 174) no Hoare annotation was computed. [2021-02-21 16:12:49,806 INFO L189 CegarLoopUtils]: For program point L144-1(lines 44 174) no Hoare annotation was computed. [2021-02-21 16:12:49,806 INFO L192 CegarLoopUtils]: At program point L169-1(lines 44 174) the Hoare annotation is: true [2021-02-21 16:12:49,806 INFO L189 CegarLoopUtils]: For program point L120(line 120) no Hoare annotation was computed. [2021-02-21 16:12:49,806 INFO L189 CegarLoopUtils]: For program point L145(line 145) no Hoare annotation was computed. [2021-02-21 16:12:49,806 INFO L189 CegarLoopUtils]: For program point L46(lines 46 48) no Hoare annotation was computed. [2021-02-21 16:12:49,806 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 6 179) no Hoare annotation was computed. [2021-02-21 16:12:49,806 INFO L189 CegarLoopUtils]: For program point L170(line 170) no Hoare annotation was computed. [2021-02-21 16:12:49,806 INFO L185 CegarLoopUtils]: At program point L170-1(lines 7 179) the Hoare annotation is: false [2021-02-21 16:12:49,806 INFO L189 CegarLoopUtils]: For program point L129-1(lines 44 174) no Hoare annotation was computed. [2021-02-21 16:12:49,806 INFO L189 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 177) no Hoare annotation was computed. [2021-02-21 16:12:49,807 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 6 179) the Hoare annotation is: true [2021-02-21 16:12:49,807 INFO L189 CegarLoopUtils]: For program point L154-1(lines 44 174) no Hoare annotation was computed. [2021-02-21 16:12:49,807 INFO L189 CegarLoopUtils]: For program point L113-1(lines 44 174) no Hoare annotation was computed. [2021-02-21 16:12:49,807 INFO L189 CegarLoopUtils]: For program point L105-1(lines 44 174) no Hoare annotation was computed. [2021-02-21 16:12:49,807 INFO L189 CegarLoopUtils]: For program point L130(line 130) no Hoare annotation was computed. [2021-02-21 16:12:49,807 INFO L189 CegarLoopUtils]: For program point L97-1(lines 44 174) no Hoare annotation was computed. [2021-02-21 16:12:49,807 INFO L189 CegarLoopUtils]: For program point L155(line 155) no Hoare annotation was computed. [2021-02-21 16:12:49,807 INFO L189 CegarLoopUtils]: For program point L89-1(lines 44 174) no Hoare annotation was computed. [2021-02-21 16:12:49,807 INFO L189 CegarLoopUtils]: For program point L81-1(lines 44 174) no Hoare annotation was computed. [2021-02-21 16:12:49,807 INFO L189 CegarLoopUtils]: For program point L139-1(lines 44 174) no Hoare annotation was computed. [2021-02-21 16:12:49,808 INFO L189 CegarLoopUtils]: For program point L73(lines 73 75) no Hoare annotation was computed. [2021-02-21 16:12:49,808 INFO L189 CegarLoopUtils]: For program point L73-2(lines 44 174) no Hoare annotation was computed. [2021-02-21 16:12:49,808 INFO L189 CegarLoopUtils]: For program point L164-1(lines 44 174) no Hoare annotation was computed. [2021-02-21 16:12:49,808 INFO L189 CegarLoopUtils]: For program point L140(line 140) no Hoare annotation was computed. [2021-02-21 16:12:49,808 INFO L189 CegarLoopUtils]: For program point L165(line 165) no Hoare annotation was computed. [2021-02-21 16:12:49,808 INFO L189 CegarLoopUtils]: For program point L124-1(lines 44 174) no Hoare annotation was computed. [2021-02-21 16:12:49,808 INFO L189 CegarLoopUtils]: For program point L149-1(lines 44 174) no Hoare annotation was computed. [2021-02-21 16:12:49,808 INFO L189 CegarLoopUtils]: For program point L125(line 125) no Hoare annotation was computed. [2021-02-21 16:12:49,808 INFO L189 CegarLoopUtils]: For program point L150(line 150) no Hoare annotation was computed. [2021-02-21 16:12:49,808 INFO L192 CegarLoopUtils]: At program point L175(lines 7 179) the Hoare annotation is: true [2021-02-21 16:12:49,809 INFO L189 CegarLoopUtils]: For program point L109-1(lines 44 174) no Hoare annotation was computed. [2021-02-21 16:12:49,809 INFO L189 CegarLoopUtils]: For program point L134-1(lines 44 174) no Hoare annotation was computed. [2021-02-21 16:12:49,809 INFO L189 CegarLoopUtils]: For program point L101-1(lines 44 174) no Hoare annotation was computed. [2021-02-21 16:12:49,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 04:12:49 BoogieIcfgContainer [2021-02-21 16:12:49,825 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 16:12:49,827 INFO L168 Benchmark]: Toolchain (without parser) took 281247.88 ms. Allocated memory was 160.4 MB in the beginning and 5.1 GB in the end (delta: 4.9 GB). Free memory was 135.8 MB in the beginning and 3.9 GB in the end (delta: -3.7 GB). Peak memory consumption was 3.5 GB. Max. memory is 8.0 GB. [2021-02-21 16:12:49,827 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 160.4 MB. Free memory is still 134.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:12:49,836 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.09 ms. Allocated memory is still 160.4 MB. Free memory was 134.6 MB in the beginning and 124.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-21 16:12:49,837 INFO L168 Benchmark]: Boogie Preprocessor took 59.60 ms. Allocated memory is still 160.4 MB. Free memory was 124.3 MB in the beginning and 122.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 16:12:49,839 INFO L168 Benchmark]: RCFGBuilder took 759.97 ms. Allocated memory is still 160.4 MB. Free memory was 122.5 MB in the beginning and 134.1 MB in the end (delta: -11.6 MB). Peak memory consumption was 15.6 MB. Max. memory is 8.0 GB. [2021-02-21 16:12:49,840 INFO L168 Benchmark]: TraceAbstraction took 280064.75 ms. Allocated memory was 160.4 MB in the beginning and 5.1 GB in the end (delta: 4.9 GB). Free memory was 133.6 MB in the beginning and 3.9 GB in the end (delta: -3.7 GB). Peak memory consumption was 3.5 GB. Max. memory is 8.0 GB. [2021-02-21 16:12:49,841 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 160.4 MB. Free memory is still 134.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 342.09 ms. Allocated memory is still 160.4 MB. Free memory was 134.6 MB in the beginning and 124.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 59.60 ms. Allocated memory is still 160.4 MB. Free memory was 124.3 MB in the beginning and 122.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 759.97 ms. Allocated memory is still 160.4 MB. Free memory was 122.5 MB in the beginning and 134.1 MB in the end (delta: -11.6 MB). Peak memory consumption was 15.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 280064.75 ms. Allocated memory was 160.4 MB in the beginning and 5.1 GB in the end (delta: 4.9 GB). Free memory was 133.6 MB in the beginning and 3.9 GB in the end (delta: -3.7 GB). Peak memory consumption was 3.5 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 177]: 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: 44]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 20.6s, OverallIterations: 30, TraceHistogramMax: 1, AutomataDifference: 10.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 259.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2800 SDtfs, 4188 SDslu, 184 SDs, 0 SdLazy, 2031 SolverSat, 71 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 210 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48649occurred in iteration=29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 6.7s AutomataMinimizationTime, 30 MinimizatonAttempts, 8222 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 37 HoareAnnotationTreeSize, 7 FomulaSimplifications, 164876390 FormulaSimplificationTreeSizeReduction, 259.2s HoareSimplificationTime, 7 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 813 NumberOfCodeBlocks, 813 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 783 ConstructedInterpolants, 0 QuantifiedInterpolants, 64316 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 30 InterpolantComputations, 30 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...