/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 17:59:24,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 17:59:24,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 17:59:24,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 17:59:24,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 17:59:24,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 17:59:24,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 17:59:24,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 17:59:24,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 17:59:24,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 17:59:24,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 17:59:24,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 17:59:24,384 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 17:59:24,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 17:59:24,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 17:59:24,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 17:59:24,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 17:59:24,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 17:59:24,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 17:59:24,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 17:59:24,416 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 17:59:24,439 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 17:59:24,440 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 17:59:24,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 17:59:24,445 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 17:59:24,446 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 17:59:24,446 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 17:59:24,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 17:59:24,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 17:59:24,447 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 17:59:24,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 17:59:24,447 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 17:59:24,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 17:59:24,448 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 17:59:24,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 17:59:24,449 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 17:59:24,449 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 17:59:24,449 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 17:59:24,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 17:59:24,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 17:59:24,450 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 17:59:24,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 17:59:24,450 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 17:59:24,451 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 17:59:24,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 17:59:24,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 17:59:24,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 17:59:24,904 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 17:59:24,905 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 17:59:24,906 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2021-02-23 17:59:25,002 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b551d0dd7/4526a7f95b454699a6350abdd02af5b1/FLAGbbeb6ae92 [2021-02-23 17:59:25,837 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 17:59:25,838 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_11.c [2021-02-23 17:59:25,852 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b551d0dd7/4526a7f95b454699a6350abdd02af5b1/FLAGbbeb6ae92 [2021-02-23 17:59:26,151 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b551d0dd7/4526a7f95b454699a6350abdd02af5b1 [2021-02-23 17:59:26,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 17:59:26,170 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 17:59:26,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 17:59:26,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 17:59:26,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 17:59:26,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:59:26" (1/1) ... [2021-02-23 17:59:26,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@100570d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:59:26, skipping insertion in model container [2021-02-23 17:59:26,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:59:26" (1/1) ... [2021-02-23 17:59:26,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 17:59:26,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 17:59:26,395 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] [2021-02-23 17:59:26,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:59:26,420 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 17:59:26,492 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] [2021-02-23 17:59:26,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 17:59:26,538 INFO L208 MainTranslator]: Completed translation [2021-02-23 17:59:26,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:59:26 WrapperNode [2021-02-23 17:59:26,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 17:59:26,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 17:59:26,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 17:59:26,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 17:59:26,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:59:26" (1/1) ... [2021-02-23 17:59:26,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:59:26" (1/1) ... [2021-02-23 17:59:26,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:59:26" (1/1) ... [2021-02-23 17:59:26,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:59:26" (1/1) ... [2021-02-23 17:59:26,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:59:26" (1/1) ... [2021-02-23 17:59:26,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:59:26" (1/1) ... [2021-02-23 17:59:26,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:59:26" (1/1) ... [2021-02-23 17:59:26,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 17:59:26,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 17:59:26,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 17:59:26,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 17:59:26,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:59:26" (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 [2021-02-23 17:59:26,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 17:59:26,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 17:59:26,714 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 17:59:26,714 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 17:59:26,714 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 17:59:26,714 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 17:59:26,714 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 17:59:26,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 17:59:26,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 17:59:26,715 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 17:59:26,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 17:59:26,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 17:59:26,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 17:59:26,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 17:59:26,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 17:59:26,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 17:59:27,287 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 17:59:27,287 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 17:59:27,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:59:27 BoogieIcfgContainer [2021-02-23 17:59:27,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 17:59:27,293 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 17:59:27,293 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 17:59:27,298 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 17:59:27,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:59:26" (1/3) ... [2021-02-23 17:59:27,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@304e5a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:59:27, skipping insertion in model container [2021-02-23 17:59:27,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:59:26" (2/3) ... [2021-02-23 17:59:27,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@304e5a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:59:27, skipping insertion in model container [2021-02-23 17:59:27,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:59:27" (3/3) ... [2021-02-23 17:59:27,302 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2021-02-23 17:59:27,311 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 17:59:27,317 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 17:59:27,342 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 17:59:27,376 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 17:59:27,377 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 17:59:27,377 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 17:59:27,377 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 17:59:27,377 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 17:59:27,378 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 17:59:27,378 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 17:59:27,378 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 17:59:27,405 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states. [2021-02-23 17:59:27,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-02-23 17:59:27,422 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:59:27,424 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:59:27,425 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:59:27,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:59:27,434 INFO L82 PathProgramCache]: Analyzing trace with hash -898561761, now seen corresponding path program 1 times [2021-02-23 17:59:27,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:59:27,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654642765] [2021-02-23 17:59:27,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:59:27,554 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:59:27,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:27,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:27,838 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:27,841 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:27,842 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:59:27,865 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:27,866 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:27,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:59:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:27,928 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:27,929 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:59:27,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654642765] [2021-02-23 17:59:27,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:59:27,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 17:59:27,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131479680] [2021-02-23 17:59:28,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 17:59:28,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:59:28,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 17:59:28,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 17:59:28,037 INFO L87 Difference]: Start difference. First operand 137 states. Second operand 4 states. [2021-02-23 17:59:28,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:59:28,701 INFO L93 Difference]: Finished difference Result 288 states and 393 transitions. [2021-02-23 17:59:28,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 17:59:28,704 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2021-02-23 17:59:28,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:59:28,722 INFO L225 Difference]: With dead ends: 288 [2021-02-23 17:59:28,722 INFO L226 Difference]: Without dead ends: 200 [2021-02-23 17:59:28,728 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 [2021-02-23 17:59:28,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-02-23 17:59:28,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2021-02-23 17:59:28,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2021-02-23 17:59:28,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 260 transitions. [2021-02-23 17:59:28,852 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 260 transitions. Word has length 87 [2021-02-23 17:59:28,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:59:28,854 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 260 transitions. [2021-02-23 17:59:28,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 17:59:28,854 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 260 transitions. [2021-02-23 17:59:28,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-02-23 17:59:28,858 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:59:28,859 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:59:28,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 17:59:28,860 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:59:28,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:59:28,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1510688528, now seen corresponding path program 1 times [2021-02-23 17:59:28,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:59:28,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615370060] [2021-02-23 17:59:28,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:59:28,867 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:59:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:29,060 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:29,062 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:29,063 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:29,064 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:59:29,070 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:29,074 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:29,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:59:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:29,119 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:29,120 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:29,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:59:29,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615370060] [2021-02-23 17:59:29,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:59:29,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 17:59:29,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483693732] [2021-02-23 17:59:29,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 17:59:29,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:59:29,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 17:59:29,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 17:59:29,183 INFO L87 Difference]: Start difference. First operand 198 states and 260 transitions. Second operand 4 states. [2021-02-23 17:59:29,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:59:29,636 INFO L93 Difference]: Finished difference Result 238 states and 318 transitions. [2021-02-23 17:59:29,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 17:59:29,637 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2021-02-23 17:59:29,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:59:29,641 INFO L225 Difference]: With dead ends: 238 [2021-02-23 17:59:29,641 INFO L226 Difference]: Without dead ends: 236 [2021-02-23 17:59:29,644 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 [2021-02-23 17:59:29,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-02-23 17:59:29,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 198. [2021-02-23 17:59:29,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2021-02-23 17:59:29,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 259 transitions. [2021-02-23 17:59:29,691 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 259 transitions. Word has length 88 [2021-02-23 17:59:29,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:59:29,692 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 259 transitions. [2021-02-23 17:59:29,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 17:59:29,693 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 259 transitions. [2021-02-23 17:59:29,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-02-23 17:59:29,695 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:59:29,695 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:59:29,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 17:59:29,695 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:59:29,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:59:29,697 INFO L82 PathProgramCache]: Analyzing trace with hash -2085367227, now seen corresponding path program 1 times [2021-02-23 17:59:29,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:59:29,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503589543] [2021-02-23 17:59:29,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:59:29,701 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:59:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:29,768 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:29,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:29,773 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:29,775 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:59:29,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:29,782 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:29,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:59:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:29,845 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:29,853 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:29,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:59:29,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503589543] [2021-02-23 17:59:29,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:59:29,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 17:59:29,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980940628] [2021-02-23 17:59:29,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 17:59:29,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:59:29,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 17:59:29,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 17:59:29,876 INFO L87 Difference]: Start difference. First operand 198 states and 259 transitions. Second operand 4 states. [2021-02-23 17:59:30,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:59:30,307 INFO L93 Difference]: Finished difference Result 474 states and 655 transitions. [2021-02-23 17:59:30,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 17:59:30,308 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2021-02-23 17:59:30,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:59:30,315 INFO L225 Difference]: With dead ends: 474 [2021-02-23 17:59:30,316 INFO L226 Difference]: Without dead ends: 333 [2021-02-23 17:59:30,318 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 [2021-02-23 17:59:30,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-02-23 17:59:30,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 331. [2021-02-23 17:59:30,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2021-02-23 17:59:30,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 448 transitions. [2021-02-23 17:59:30,426 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 448 transitions. Word has length 88 [2021-02-23 17:59:30,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:59:30,427 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 448 transitions. [2021-02-23 17:59:30,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 17:59:30,428 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 448 transitions. [2021-02-23 17:59:30,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-02-23 17:59:30,439 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:59:30,439 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:59:30,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 17:59:30,440 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:59:30,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:59:30,441 INFO L82 PathProgramCache]: Analyzing trace with hash 348430457, now seen corresponding path program 1 times [2021-02-23 17:59:30,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:59:30,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031626298] [2021-02-23 17:59:30,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:59:30,454 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:59:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:30,538 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:30,539 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:30,540 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:30,541 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:59:30,546 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:30,546 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:30,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:59:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:30,600 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:30,601 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:59:30,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031626298] [2021-02-23 17:59:30,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:59:30,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 17:59:30,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189346455] [2021-02-23 17:59:30,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 17:59:30,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:59:30,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 17:59:30,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 17:59:30,614 INFO L87 Difference]: Start difference. First operand 331 states and 448 transitions. Second operand 4 states. [2021-02-23 17:59:31,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:59:31,080 INFO L93 Difference]: Finished difference Result 403 states and 554 transitions. [2021-02-23 17:59:31,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 17:59:31,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2021-02-23 17:59:31,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:59:31,084 INFO L225 Difference]: With dead ends: 403 [2021-02-23 17:59:31,084 INFO L226 Difference]: Without dead ends: 401 [2021-02-23 17:59:31,085 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 [2021-02-23 17:59:31,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-02-23 17:59:31,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 331. [2021-02-23 17:59:31,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2021-02-23 17:59:31,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 446 transitions. [2021-02-23 17:59:31,151 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 446 transitions. Word has length 89 [2021-02-23 17:59:31,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:59:31,154 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 446 transitions. [2021-02-23 17:59:31,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 17:59:31,154 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 446 transitions. [2021-02-23 17:59:31,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-02-23 17:59:31,162 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:59:31,163 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:59:31,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 17:59:31,163 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:59:31,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:59:31,164 INFO L82 PathProgramCache]: Analyzing trace with hash -221630637, now seen corresponding path program 1 times [2021-02-23 17:59:31,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:59:31,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935869116] [2021-02-23 17:59:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:59:31,169 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:59:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:31,254 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:31,256 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:31,262 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:31,263 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:59:31,269 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:31,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:31,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:59:31,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:31,302 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:31,303 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:59:31,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935869116] [2021-02-23 17:59:31,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:59:31,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 17:59:31,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928750841] [2021-02-23 17:59:31,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 17:59:31,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:59:31,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 17:59:31,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 17:59:31,317 INFO L87 Difference]: Start difference. First operand 331 states and 446 transitions. Second operand 4 states. [2021-02-23 17:59:31,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:59:31,791 INFO L93 Difference]: Finished difference Result 867 states and 1208 transitions. [2021-02-23 17:59:31,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 17:59:31,793 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2021-02-23 17:59:31,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:59:31,797 INFO L225 Difference]: With dead ends: 867 [2021-02-23 17:59:31,798 INFO L226 Difference]: Without dead ends: 593 [2021-02-23 17:59:31,801 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 [2021-02-23 17:59:31,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-02-23 17:59:31,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 591. [2021-02-23 17:59:31,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2021-02-23 17:59:31,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 810 transitions. [2021-02-23 17:59:31,902 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 810 transitions. Word has length 89 [2021-02-23 17:59:31,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:59:31,902 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 810 transitions. [2021-02-23 17:59:31,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 17:59:31,903 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 810 transitions. [2021-02-23 17:59:31,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-02-23 17:59:31,904 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:59:31,904 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:59:31,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 17:59:31,905 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:59:31,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:59:31,905 INFO L82 PathProgramCache]: Analyzing trace with hash 2146544516, now seen corresponding path program 1 times [2021-02-23 17:59:31,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:59:31,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373252492] [2021-02-23 17:59:31,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:59:31,908 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:59:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:31,938 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:31,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:31,939 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:31,940 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:59:31,943 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:31,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:31,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:59:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:31,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:31,995 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:59:32,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373252492] [2021-02-23 17:59:32,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:59:32,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 17:59:32,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066816492] [2021-02-23 17:59:32,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 17:59:32,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:59:32,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 17:59:32,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 17:59:32,013 INFO L87 Difference]: Start difference. First operand 591 states and 810 transitions. Second operand 4 states. [2021-02-23 17:59:32,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:59:32,476 INFO L93 Difference]: Finished difference Result 723 states and 1004 transitions. [2021-02-23 17:59:32,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 17:59:32,477 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2021-02-23 17:59:32,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:59:32,482 INFO L225 Difference]: With dead ends: 723 [2021-02-23 17:59:32,482 INFO L226 Difference]: Without dead ends: 721 [2021-02-23 17:59:32,483 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 [2021-02-23 17:59:32,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-02-23 17:59:32,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 591. [2021-02-23 17:59:32,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2021-02-23 17:59:32,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 806 transitions. [2021-02-23 17:59:32,598 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 806 transitions. Word has length 90 [2021-02-23 17:59:32,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:59:32,599 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 806 transitions. [2021-02-23 17:59:32,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 17:59:32,599 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 806 transitions. [2021-02-23 17:59:32,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-02-23 17:59:32,601 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:59:32,601 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:59:32,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 17:59:32,602 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:59:32,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:59:32,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1719629177, now seen corresponding path program 1 times [2021-02-23 17:59:32,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:59:32,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242001135] [2021-02-23 17:59:32,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:59:32,606 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:59:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:32,635 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:32,636 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:32,637 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:32,637 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:59:32,641 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:32,642 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:32,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:59:32,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:32,677 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:32,678 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:59:32,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242001135] [2021-02-23 17:59:32,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:59:32,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 17:59:32,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591099478] [2021-02-23 17:59:32,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 17:59:32,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:59:32,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 17:59:32,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 17:59:32,690 INFO L87 Difference]: Start difference. First operand 591 states and 806 transitions. Second operand 4 states. [2021-02-23 17:59:33,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:59:33,211 INFO L93 Difference]: Finished difference Result 1635 states and 2272 transitions. [2021-02-23 17:59:33,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 17:59:33,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2021-02-23 17:59:33,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:59:33,218 INFO L225 Difference]: With dead ends: 1635 [2021-02-23 17:59:33,219 INFO L226 Difference]: Without dead ends: 1101 [2021-02-23 17:59:33,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 17:59:33,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-02-23 17:59:33,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1099. [2021-02-23 17:59:33,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1099 states. [2021-02-23 17:59:33,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1506 transitions. [2021-02-23 17:59:33,381 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1506 transitions. Word has length 90 [2021-02-23 17:59:33,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:59:33,382 INFO L480 AbstractCegarLoop]: Abstraction has 1099 states and 1506 transitions. [2021-02-23 17:59:33,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 17:59:33,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1506 transitions. [2021-02-23 17:59:33,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-02-23 17:59:33,384 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:59:33,384 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:59:33,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 17:59:33,385 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:59:33,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:59:33,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1769141639, now seen corresponding path program 1 times [2021-02-23 17:59:33,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:59:33,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58243928] [2021-02-23 17:59:33,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:59:33,388 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:59:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:33,414 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:33,415 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:33,416 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:33,416 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:59:33,419 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:33,420 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:33,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:59:33,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:33,450 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:33,451 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:33,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:59:33,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58243928] [2021-02-23 17:59:33,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:59:33,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 17:59:33,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014416154] [2021-02-23 17:59:33,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 17:59:33,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:59:33,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 17:59:33,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 17:59:33,462 INFO L87 Difference]: Start difference. First operand 1099 states and 1506 transitions. Second operand 4 states. [2021-02-23 17:59:34,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:59:34,315 INFO L93 Difference]: Finished difference Result 3135 states and 4340 transitions. [2021-02-23 17:59:34,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 17:59:34,316 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2021-02-23 17:59:34,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:59:34,330 INFO L225 Difference]: With dead ends: 3135 [2021-02-23 17:59:34,330 INFO L226 Difference]: Without dead ends: 2093 [2021-02-23 17:59:34,337 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 [2021-02-23 17:59:34,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2021-02-23 17:59:34,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2091. [2021-02-23 17:59:34,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2091 states. [2021-02-23 17:59:34,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 2858 transitions. [2021-02-23 17:59:34,716 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 2858 transitions. Word has length 91 [2021-02-23 17:59:34,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:59:34,717 INFO L480 AbstractCegarLoop]: Abstraction has 2091 states and 2858 transitions. [2021-02-23 17:59:34,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 17:59:34,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 2858 transitions. [2021-02-23 17:59:34,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-02-23 17:59:34,720 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:59:34,720 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:59:34,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 17:59:34,721 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:59:34,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:59:34,722 INFO L82 PathProgramCache]: Analyzing trace with hash 2053505869, now seen corresponding path program 1 times [2021-02-23 17:59:34,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:59:34,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940580285] [2021-02-23 17:59:34,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:59:34,725 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:59:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:34,757 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:34,763 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:34,764 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:34,766 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:59:34,770 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:34,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:34,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:59:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:34,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:34,803 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:34,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:59:34,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940580285] [2021-02-23 17:59:34,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:59:34,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 17:59:34,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364608157] [2021-02-23 17:59:34,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 17:59:34,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:59:34,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 17:59:34,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 17:59:34,818 INFO L87 Difference]: Start difference. First operand 2091 states and 2858 transitions. Second operand 4 states. [2021-02-23 17:59:35,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:59:35,505 INFO L93 Difference]: Finished difference Result 2559 states and 3532 transitions. [2021-02-23 17:59:35,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 17:59:35,506 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2021-02-23 17:59:35,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:59:35,520 INFO L225 Difference]: With dead ends: 2559 [2021-02-23 17:59:35,520 INFO L226 Difference]: Without dead ends: 2557 [2021-02-23 17:59:35,522 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 [2021-02-23 17:59:35,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-02-23 17:59:35,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 2091. [2021-02-23 17:59:35,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2091 states. [2021-02-23 17:59:35,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 2842 transitions. [2021-02-23 17:59:35,855 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 2842 transitions. Word has length 91 [2021-02-23 17:59:35,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:59:35,856 INFO L480 AbstractCegarLoop]: Abstraction has 2091 states and 2842 transitions. [2021-02-23 17:59:35,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 17:59:35,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 2842 transitions. [2021-02-23 17:59:35,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-02-23 17:59:35,859 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:59:35,859 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:59:35,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 17:59:35,860 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:59:35,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:59:35,861 INFO L82 PathProgramCache]: Analyzing trace with hash -830691816, now seen corresponding path program 1 times [2021-02-23 17:59:35,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:59:35,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460198761] [2021-02-23 17:59:35,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:59:35,864 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:59:35,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:35,888 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:35,889 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:35,890 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:35,890 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:59:35,894 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:35,894 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:35,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:59:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:35,930 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:35,930 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:59:35,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460198761] [2021-02-23 17:59:35,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:59:35,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 17:59:35,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310465008] [2021-02-23 17:59:35,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 17:59:35,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:59:35,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 17:59:35,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 17:59:35,943 INFO L87 Difference]: Start difference. First operand 2091 states and 2842 transitions. Second operand 4 states. [2021-02-23 17:59:36,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:59:36,801 INFO L93 Difference]: Finished difference Result 2543 states and 3484 transitions. [2021-02-23 17:59:36,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 17:59:36,801 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2021-02-23 17:59:36,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:59:36,817 INFO L225 Difference]: With dead ends: 2543 [2021-02-23 17:59:36,818 INFO L226 Difference]: Without dead ends: 2541 [2021-02-23 17:59:36,820 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 [2021-02-23 17:59:36,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-02-23 17:59:37,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2091. [2021-02-23 17:59:37,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2091 states. [2021-02-23 17:59:37,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2091 states to 2091 states and 2826 transitions. [2021-02-23 17:59:37,128 INFO L78 Accepts]: Start accepts. Automaton has 2091 states and 2826 transitions. Word has length 92 [2021-02-23 17:59:37,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:59:37,128 INFO L480 AbstractCegarLoop]: Abstraction has 2091 states and 2826 transitions. [2021-02-23 17:59:37,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 17:59:37,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states and 2826 transitions. [2021-02-23 17:59:37,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-02-23 17:59:37,131 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:59:37,131 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:59:37,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 17:59:37,132 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:59:37,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:59:37,133 INFO L82 PathProgramCache]: Analyzing trace with hash -990938963, now seen corresponding path program 1 times [2021-02-23 17:59:37,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:59:37,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101919016] [2021-02-23 17:59:37,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:59:37,135 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:59:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:37,154 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:37,155 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:37,155 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:37,156 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:59:37,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:37,159 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:37,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:59:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:37,190 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:37,191 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:59:37,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101919016] [2021-02-23 17:59:37,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:59:37,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 17:59:37,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148807907] [2021-02-23 17:59:37,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 17:59:37,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:59:37,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 17:59:37,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 17:59:37,202 INFO L87 Difference]: Start difference. First operand 2091 states and 2826 transitions. Second operand 4 states. [2021-02-23 17:59:38,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:59:38,265 INFO L93 Difference]: Finished difference Result 6063 states and 8236 transitions. [2021-02-23 17:59:38,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 17:59:38,266 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2021-02-23 17:59:38,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:59:38,288 INFO L225 Difference]: With dead ends: 6063 [2021-02-23 17:59:38,288 INFO L226 Difference]: Without dead ends: 4029 [2021-02-23 17:59:38,295 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 [2021-02-23 17:59:38,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4029 states. [2021-02-23 17:59:39,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4029 to 4027. [2021-02-23 17:59:39,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4027 states. [2021-02-23 17:59:39,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4027 states to 4027 states and 5402 transitions. [2021-02-23 17:59:39,059 INFO L78 Accepts]: Start accepts. Automaton has 4027 states and 5402 transitions. Word has length 92 [2021-02-23 17:59:39,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:59:39,059 INFO L480 AbstractCegarLoop]: Abstraction has 4027 states and 5402 transitions. [2021-02-23 17:59:39,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 17:59:39,060 INFO L276 IsEmpty]: Start isEmpty. Operand 4027 states and 5402 transitions. [2021-02-23 17:59:39,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-02-23 17:59:39,064 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:59:39,064 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:59:39,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 17:59:39,065 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:59:39,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:59:39,066 INFO L82 PathProgramCache]: Analyzing trace with hash -46506463, now seen corresponding path program 1 times [2021-02-23 17:59:39,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:59:39,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621636915] [2021-02-23 17:59:39,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:59:39,068 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:59:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:39,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:39,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:39,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:39,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:59:39,095 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:39,095 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:39,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:59:39,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:39,127 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:39,128 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:39,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:59:39,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621636915] [2021-02-23 17:59:39,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:59:39,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 17:59:39,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750494247] [2021-02-23 17:59:39,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 17:59:39,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:59:39,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 17:59:39,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 17:59:39,146 INFO L87 Difference]: Start difference. First operand 4027 states and 5402 transitions. Second operand 4 states. [2021-02-23 17:59:40,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:59:40,066 INFO L93 Difference]: Finished difference Result 4863 states and 6556 transitions. [2021-02-23 17:59:40,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 17:59:40,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2021-02-23 17:59:40,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:59:40,092 INFO L225 Difference]: With dead ends: 4863 [2021-02-23 17:59:40,092 INFO L226 Difference]: Without dead ends: 4861 [2021-02-23 17:59:40,096 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 [2021-02-23 17:59:40,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4861 states. [2021-02-23 17:59:40,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4861 to 4027. [2021-02-23 17:59:40,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4027 states. [2021-02-23 17:59:40,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4027 states to 4027 states and 5370 transitions. [2021-02-23 17:59:40,828 INFO L78 Accepts]: Start accepts. Automaton has 4027 states and 5370 transitions. Word has length 93 [2021-02-23 17:59:40,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:59:40,829 INFO L480 AbstractCegarLoop]: Abstraction has 4027 states and 5370 transitions. [2021-02-23 17:59:40,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 17:59:40,829 INFO L276 IsEmpty]: Start isEmpty. Operand 4027 states and 5370 transitions. [2021-02-23 17:59:40,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-02-23 17:59:40,833 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:59:40,834 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:59:40,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 17:59:40,834 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:59:40,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:59:40,835 INFO L82 PathProgramCache]: Analyzing trace with hash -654091333, now seen corresponding path program 1 times [2021-02-23 17:59:40,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:59:40,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070686422] [2021-02-23 17:59:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:59:40,837 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:59:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:40,858 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:40,858 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:40,859 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:40,860 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:59:40,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:40,864 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:40,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:59:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:40,892 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:40,893 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:59:40,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070686422] [2021-02-23 17:59:40,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:59:40,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 17:59:40,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184491212] [2021-02-23 17:59:40,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 17:59:40,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:59:40,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 17:59:40,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 17:59:40,905 INFO L87 Difference]: Start difference. First operand 4027 states and 5370 transitions. Second operand 4 states. [2021-02-23 17:59:42,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:59:42,283 INFO L93 Difference]: Finished difference Result 11775 states and 15740 transitions. [2021-02-23 17:59:42,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 17:59:42,283 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2021-02-23 17:59:42,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:59:42,325 INFO L225 Difference]: With dead ends: 11775 [2021-02-23 17:59:42,325 INFO L226 Difference]: Without dead ends: 7805 [2021-02-23 17:59:42,340 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 [2021-02-23 17:59:42,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7805 states. [2021-02-23 17:59:43,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7805 to 7803. [2021-02-23 17:59:43,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7803 states. [2021-02-23 17:59:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7803 states to 7803 states and 10298 transitions. [2021-02-23 17:59:43,240 INFO L78 Accepts]: Start accepts. Automaton has 7803 states and 10298 transitions. Word has length 93 [2021-02-23 17:59:43,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:59:43,241 INFO L480 AbstractCegarLoop]: Abstraction has 7803 states and 10298 transitions. [2021-02-23 17:59:43,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 17:59:43,241 INFO L276 IsEmpty]: Start isEmpty. Operand 7803 states and 10298 transitions. [2021-02-23 17:59:43,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-02-23 17:59:43,248 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:59:43,249 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:59:43,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-23 17:59:43,249 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:59:43,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:59:43,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1506563924, now seen corresponding path program 1 times [2021-02-23 17:59:43,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:59:43,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636257406] [2021-02-23 17:59:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:59:43,252 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:59:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:43,275 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:43,276 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:43,277 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:43,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:59:43,280 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:43,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:43,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:59:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:43,317 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:43,318 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:59:43,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636257406] [2021-02-23 17:59:43,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:59:43,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 17:59:43,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744557079] [2021-02-23 17:59:43,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 17:59:43,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:59:43,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 17:59:43,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 17:59:43,330 INFO L87 Difference]: Start difference. First operand 7803 states and 10298 transitions. Second operand 4 states. [2021-02-23 17:59:44,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:59:44,689 INFO L93 Difference]: Finished difference Result 9343 states and 12348 transitions. [2021-02-23 17:59:44,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 17:59:44,690 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2021-02-23 17:59:44,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:59:44,717 INFO L225 Difference]: With dead ends: 9343 [2021-02-23 17:59:44,717 INFO L226 Difference]: Without dead ends: 9341 [2021-02-23 17:59:44,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 17:59:44,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2021-02-23 17:59:45,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 7803. [2021-02-23 17:59:45,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7803 states. [2021-02-23 17:59:45,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7803 states to 7803 states and 10234 transitions. [2021-02-23 17:59:45,918 INFO L78 Accepts]: Start accepts. Automaton has 7803 states and 10234 transitions. Word has length 94 [2021-02-23 17:59:45,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:59:45,919 INFO L480 AbstractCegarLoop]: Abstraction has 7803 states and 10234 transitions. [2021-02-23 17:59:45,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 17:59:45,919 INFO L276 IsEmpty]: Start isEmpty. Operand 7803 states and 10234 transitions. [2021-02-23 17:59:45,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-02-23 17:59:45,933 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:59:45,933 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:59:45,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-23 17:59:45,934 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:59:45,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:59:45,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1198250977, now seen corresponding path program 1 times [2021-02-23 17:59:45,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:59:45,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884322562] [2021-02-23 17:59:45,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:59:45,939 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:59:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:45,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:45,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:45,966 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:45,967 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:59:45,970 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:45,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:45,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:59:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:45,999 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:46,000 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:59:46,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884322562] [2021-02-23 17:59:46,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:59:46,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 17:59:46,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296050550] [2021-02-23 17:59:46,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 17:59:46,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:59:46,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 17:59:46,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 17:59:46,017 INFO L87 Difference]: Start difference. First operand 7803 states and 10234 transitions. Second operand 4 states. [2021-02-23 17:59:48,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:59:48,159 INFO L93 Difference]: Finished difference Result 22911 states and 30076 transitions. [2021-02-23 17:59:48,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 17:59:48,160 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2021-02-23 17:59:48,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:59:48,210 INFO L225 Difference]: With dead ends: 22911 [2021-02-23 17:59:48,211 INFO L226 Difference]: Without dead ends: 15165 [2021-02-23 17:59:48,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 17:59:48,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15165 states. [2021-02-23 17:59:50,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15165 to 15163. [2021-02-23 17:59:50,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15163 states. [2021-02-23 17:59:50,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15163 states to 15163 states and 19642 transitions. [2021-02-23 17:59:50,240 INFO L78 Accepts]: Start accepts. Automaton has 15163 states and 19642 transitions. Word has length 94 [2021-02-23 17:59:50,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:59:50,240 INFO L480 AbstractCegarLoop]: Abstraction has 15163 states and 19642 transitions. [2021-02-23 17:59:50,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 17:59:50,240 INFO L276 IsEmpty]: Start isEmpty. Operand 15163 states and 19642 transitions. [2021-02-23 17:59:50,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-02-23 17:59:50,255 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:59:50,255 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:59:50,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-23 17:59:50,255 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:59:50,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:59:50,256 INFO L82 PathProgramCache]: Analyzing trace with hash 476295413, now seen corresponding path program 1 times [2021-02-23 17:59:50,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:59:50,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472527759] [2021-02-23 17:59:50,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:59:50,259 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:59:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:50,280 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:50,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:50,281 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:50,282 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:59:50,285 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:50,286 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:50,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:59:50,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:50,318 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:50,319 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:50,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:59:50,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472527759] [2021-02-23 17:59:50,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:59:50,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 17:59:50,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734895798] [2021-02-23 17:59:50,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 17:59:50,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:59:50,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 17:59:50,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 17:59:50,329 INFO L87 Difference]: Start difference. First operand 15163 states and 19642 transitions. Second operand 4 states. [2021-02-23 17:59:53,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 17:59:53,483 INFO L93 Difference]: Finished difference Result 17983 states and 23228 transitions. [2021-02-23 17:59:53,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 17:59:53,484 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2021-02-23 17:59:53,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 17:59:53,566 INFO L225 Difference]: With dead ends: 17983 [2021-02-23 17:59:53,567 INFO L226 Difference]: Without dead ends: 17981 [2021-02-23 17:59:53,586 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 [2021-02-23 17:59:53,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17981 states. [2021-02-23 17:59:56,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17981 to 15163. [2021-02-23 17:59:56,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15163 states. [2021-02-23 17:59:56,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15163 states to 15163 states and 19514 transitions. [2021-02-23 17:59:56,235 INFO L78 Accepts]: Start accepts. Automaton has 15163 states and 19514 transitions. Word has length 95 [2021-02-23 17:59:56,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 17:59:56,236 INFO L480 AbstractCegarLoop]: Abstraction has 15163 states and 19514 transitions. [2021-02-23 17:59:56,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 17:59:56,236 INFO L276 IsEmpty]: Start isEmpty. Operand 15163 states and 19514 transitions. [2021-02-23 17:59:56,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-02-23 17:59:56,250 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 17:59:56,251 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 17:59:56,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-23 17:59:56,251 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 17:59:56,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 17:59:56,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1508679185, now seen corresponding path program 1 times [2021-02-23 17:59:56,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 17:59:56,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109983282] [2021-02-23 17:59:56,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 17:59:56,255 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 17:59:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:56,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:56,276 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:56,277 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:56,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 17:59:56,281 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:56,282 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:56,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 17:59:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 17:59:56,310 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 17:59:56,310 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 17:59:56,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 17:59:56,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109983282] [2021-02-23 17:59:56,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 17:59:56,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 17:59:56,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799686757] [2021-02-23 17:59:56,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 17:59:56,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 17:59:56,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 17:59:56,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 17:59:56,326 INFO L87 Difference]: Start difference. First operand 15163 states and 19514 transitions. Second operand 4 states. [2021-02-23 18:00:00,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:00:00,506 INFO L93 Difference]: Finished difference Result 44607 states and 57404 transitions. [2021-02-23 18:00:00,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 18:00:00,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2021-02-23 18:00:00,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:00:00,741 INFO L225 Difference]: With dead ends: 44607 [2021-02-23 18:00:00,742 INFO L226 Difference]: Without dead ends: 29501 [2021-02-23 18:00:00,806 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 [2021-02-23 18:00:00,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29501 states. [2021-02-23 18:00:05,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29501 to 29499. [2021-02-23 18:00:05,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29499 states. [2021-02-23 18:00:05,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29499 states to 29499 states and 37434 transitions. [2021-02-23 18:00:05,877 INFO L78 Accepts]: Start accepts. Automaton has 29499 states and 37434 transitions. Word has length 95 [2021-02-23 18:00:05,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:00:05,878 INFO L480 AbstractCegarLoop]: Abstraction has 29499 states and 37434 transitions. [2021-02-23 18:00:05,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 18:00:05,878 INFO L276 IsEmpty]: Start isEmpty. Operand 29499 states and 37434 transitions. [2021-02-23 18:00:05,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-02-23 18:00:05,907 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:00:05,907 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:00:05,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-23 18:00:05,908 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:00:05,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:00:05,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1815393088, now seen corresponding path program 1 times [2021-02-23 18:00:05,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:00:05,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020460526] [2021-02-23 18:00:05,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:00:05,912 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:00:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:00:05,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:00:05,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:00:05,940 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:00:05,941 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:00:05,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:00:05,945 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:00:05,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:00:05,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:00:05,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:00:05,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:00:05,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:00:05,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020460526] [2021-02-23 18:00:05,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:00:05,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 18:00:05,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139924041] [2021-02-23 18:00:05,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 18:00:05,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:00:05,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 18:00:05,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:00:05,991 INFO L87 Difference]: Start difference. First operand 29499 states and 37434 transitions. Second operand 4 states. [2021-02-23 18:00:11,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:00:11,494 INFO L93 Difference]: Finished difference Result 34623 states and 43580 transitions. [2021-02-23 18:00:11,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 18:00:11,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2021-02-23 18:00:11,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:00:11,606 INFO L225 Difference]: With dead ends: 34623 [2021-02-23 18:00:11,607 INFO L226 Difference]: Without dead ends: 34621 [2021-02-23 18:00:11,632 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 [2021-02-23 18:00:11,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34621 states. [2021-02-23 18:00:16,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34621 to 29499. [2021-02-23 18:00:16,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29499 states. [2021-02-23 18:00:16,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29499 states to 29499 states and 37178 transitions. [2021-02-23 18:00:16,502 INFO L78 Accepts]: Start accepts. Automaton has 29499 states and 37178 transitions. Word has length 96 [2021-02-23 18:00:16,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:00:16,503 INFO L480 AbstractCegarLoop]: Abstraction has 29499 states and 37178 transitions. [2021-02-23 18:00:16,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 18:00:16,503 INFO L276 IsEmpty]: Start isEmpty. Operand 29499 states and 37178 transitions. [2021-02-23 18:00:16,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-02-23 18:00:16,531 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:00:16,531 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:00:16,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-02-23 18:00:16,532 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:00:16,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:00:16,532 INFO L82 PathProgramCache]: Analyzing trace with hash 475832085, now seen corresponding path program 1 times [2021-02-23 18:00:16,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:00:16,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724239021] [2021-02-23 18:00:16,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:00:16,536 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:00:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:00:16,559 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:00:16,560 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:00:16,560 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:00:16,561 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:00:16,565 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:00:16,565 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:00:16,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:00:16,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:00:16,597 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:00:16,598 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:00:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:00:16,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724239021] [2021-02-23 18:00:16,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:00:16,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 18:00:16,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635318624] [2021-02-23 18:00:16,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 18:00:16,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:00:16,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 18:00:16,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:00:16,609 INFO L87 Difference]: Start difference. First operand 29499 states and 37178 transitions. Second operand 4 states. [2021-02-23 18:00:26,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:00:26,285 INFO L93 Difference]: Finished difference Result 86847 states and 109372 transitions. [2021-02-23 18:00:26,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 18:00:26,285 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2021-02-23 18:00:26,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:00:26,648 INFO L225 Difference]: With dead ends: 86847 [2021-02-23 18:00:26,649 INFO L226 Difference]: Without dead ends: 57405 [2021-02-23 18:00:26,778 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 [2021-02-23 18:00:26,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57405 states. [2021-02-23 18:00:35,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57405 to 57403. [2021-02-23 18:00:35,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57403 states. [2021-02-23 18:00:35,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57403 states to 57403 states and 71226 transitions. [2021-02-23 18:00:35,540 INFO L78 Accepts]: Start accepts. Automaton has 57403 states and 71226 transitions. Word has length 96 [2021-02-23 18:00:35,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:00:35,540 INFO L480 AbstractCegarLoop]: Abstraction has 57403 states and 71226 transitions. [2021-02-23 18:00:35,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 18:00:35,541 INFO L276 IsEmpty]: Start isEmpty. Operand 57403 states and 71226 transitions. [2021-02-23 18:00:35,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-02-23 18:00:35,831 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:00:35,831 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:00:35,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-02-23 18:00:35,832 INFO L428 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:00:35,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:00:35,835 INFO L82 PathProgramCache]: Analyzing trace with hash 377748425, now seen corresponding path program 1 times [2021-02-23 18:00:35,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:00:35,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066127714] [2021-02-23 18:00:35,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:00:35,848 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:00:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:00:35,875 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:00:35,880 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:00:35,881 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:00:35,882 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:00:35,888 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:00:35,889 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:00:35,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:00:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:00:35,919 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:00:35,920 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:00:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:00:35,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066127714] [2021-02-23 18:00:35,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:00:35,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 18:00:35,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010611808] [2021-02-23 18:00:35,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 18:00:35,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:00:35,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 18:00:35,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:00:35,937 INFO L87 Difference]: Start difference. First operand 57403 states and 71226 transitions. Second operand 4 states. [2021-02-23 18:00:45,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:00:45,610 INFO L93 Difference]: Finished difference Result 66623 states and 81468 transitions. [2021-02-23 18:00:45,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 18:00:45,611 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2021-02-23 18:00:45,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:00:45,798 INFO L225 Difference]: With dead ends: 66623 [2021-02-23 18:00:45,799 INFO L226 Difference]: Without dead ends: 66621 [2021-02-23 18:00:45,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 18:00:45,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66621 states. [2021-02-23 18:00:54,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66621 to 57403. [2021-02-23 18:00:54,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57403 states. [2021-02-23 18:00:54,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57403 states to 57403 states and 70714 transitions. [2021-02-23 18:00:54,564 INFO L78 Accepts]: Start accepts. Automaton has 57403 states and 70714 transitions. Word has length 97 [2021-02-23 18:00:54,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:00:54,564 INFO L480 AbstractCegarLoop]: Abstraction has 57403 states and 70714 transitions. [2021-02-23 18:00:54,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 18:00:54,565 INFO L276 IsEmpty]: Start isEmpty. Operand 57403 states and 70714 transitions. [2021-02-23 18:00:54,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-02-23 18:00:54,595 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:00:54,595 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:00:54,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-02-23 18:00:54,596 INFO L428 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:00:54,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:00:54,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1866139683, now seen corresponding path program 1 times [2021-02-23 18:00:54,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:00:54,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323449596] [2021-02-23 18:00:54,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:00:54,599 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:00:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:00:54,619 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:00:54,620 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:00:54,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:00:54,621 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:00:54,625 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:00:54,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:00:54,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:00:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:00:54,654 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:00:54,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:00:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:00:54,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323449596] [2021-02-23 18:00:54,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:00:54,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 18:00:54,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495597876] [2021-02-23 18:00:54,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 18:00:54,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:00:54,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 18:00:54,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:00:54,664 INFO L87 Difference]: Start difference. First operand 57403 states and 70714 transitions. Second operand 4 states. [2021-02-23 18:01:10,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:01:10,414 INFO L93 Difference]: Finished difference Result 169021 states and 207931 transitions. [2021-02-23 18:01:10,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 18:01:10,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2021-02-23 18:01:10,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:01:10,601 INFO L225 Difference]: With dead ends: 169021 [2021-02-23 18:01:10,602 INFO L226 Difference]: Without dead ends: 57403 [2021-02-23 18:01:10,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 18:01:10,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57403 states. [2021-02-23 18:01:18,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57403 to 57403. [2021-02-23 18:01:18,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57403 states. [2021-02-23 18:01:18,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57403 states to 57403 states and 68666 transitions. [2021-02-23 18:01:18,626 INFO L78 Accepts]: Start accepts. Automaton has 57403 states and 68666 transitions. Word has length 97 [2021-02-23 18:01:18,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:01:18,627 INFO L480 AbstractCegarLoop]: Abstraction has 57403 states and 68666 transitions. [2021-02-23 18:01:18,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 18:01:18,627 INFO L276 IsEmpty]: Start isEmpty. Operand 57403 states and 68666 transitions. [2021-02-23 18:01:18,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-02-23 18:01:18,647 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:01:18,647 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:01:18,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-02-23 18:01:18,647 INFO L428 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:01:18,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:01:18,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1239562796, now seen corresponding path program 1 times [2021-02-23 18:01:18,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:01:18,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123400642] [2021-02-23 18:01:18,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:01:18,650 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:01:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:01:18,669 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:01:18,670 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:01:18,671 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:01:18,671 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:01:18,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:01:18,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:01:18,850 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-02-23 18:01:18,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:01:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:01:18,859 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:01:18,859 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:01:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:01:18,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123400642] [2021-02-23 18:01:18,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:01:18,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 18:01:18,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465787244] [2021-02-23 18:01:18,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 18:01:18,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:01:18,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 18:01:18,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:01:18,872 INFO L87 Difference]: Start difference. First operand 57403 states and 68666 transitions. Second operand 4 states. [2021-02-23 18:01:25,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:01:25,918 INFO L93 Difference]: Finished difference Result 57403 states and 68666 transitions. [2021-02-23 18:01:25,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 18:01:25,922 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2021-02-23 18:01:25,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:01:25,922 INFO L225 Difference]: With dead ends: 57403 [2021-02-23 18:01:25,922 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 18:01:25,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 18:01:25,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 18:01:25,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 18:01:25,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 18:01:25,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 18:01:25,968 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 98 [2021-02-23 18:01:25,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:01:25,968 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 18:01:25,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 18:01:25,968 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 18:01:25,968 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 18:01:25,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-02-23 18:01:25,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 18:01:46,200 WARN L202 SmtUtils]: Spent 20.11 s on a formula simplification. DAG size of input: 4192 DAG size of output: 34 [2021-02-23 18:01:50,665 WARN L202 SmtUtils]: Spent 4.44 s on a formula simplification. DAG size of input: 2102 DAG size of output: 31 [2021-02-23 18:02:51,306 WARN L202 SmtUtils]: Spent 1.01 m on a formula simplification that was a NOOP. DAG size: 2125 [2021-02-23 18:03:09,246 WARN L202 SmtUtils]: Spent 17.92 s on a formula simplification. DAG size of input: 2134 DAG size of output: 581 [2021-02-23 18:03:12,078 WARN L202 SmtUtils]: Spent 2.81 s on a formula simplification. DAG size of input: 1091 DAG size of output: 189 [2021-02-23 18:03:15,167 WARN L202 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 1120 DAG size of output: 191 [2021-02-23 18:03:17,321 WARN L202 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 1216 DAG size of output: 87 [2021-02-23 18:03:22,268 WARN L202 SmtUtils]: Spent 4.93 s on a formula simplification. DAG size of input: 2107 DAG size of output: 45 [2021-02-23 18:04:19,383 WARN L202 SmtUtils]: Spent 57.09 s on a formula simplification. DAG size of input: 5189 DAG size of output: 31 [2021-02-23 18:04:27,441 WARN L202 SmtUtils]: Spent 8.05 s on a formula simplification. DAG size of input: 1095 DAG size of output: 581 [2021-02-23 18:04:37,180 WARN L202 SmtUtils]: Spent 9.72 s on a formula simplification. DAG size of input: 2914 DAG size of output: 53 [2021-02-23 18:04:53,370 WARN L202 SmtUtils]: Spent 16.18 s on a formula simplification that was a NOOP. DAG size: 1099 [2021-02-23 18:05:09,465 WARN L202 SmtUtils]: Spent 16.08 s on a formula simplification. DAG size of input: 2656 DAG size of output: 41 [2021-02-23 18:05:14,164 WARN L202 SmtUtils]: Spent 4.68 s on a formula simplification. DAG size of input: 2111 DAG size of output: 65 [2021-02-23 18:05:47,179 WARN L202 SmtUtils]: Spent 33.00 s on a formula simplification. DAG size of input: 4797 DAG size of output: 31 [2021-02-23 18:05:48,209 WARN L202 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 1076 DAG size of output: 31 [2021-02-23 18:05:58,996 WARN L202 SmtUtils]: Spent 10.77 s on a formula simplification. DAG size of input: 2146 DAG size of output: 321 [2021-02-23 18:06:01,098 WARN L202 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 1144 DAG size of output: 123 [2021-02-23 18:06:03,035 WARN L202 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 1312 DAG size of output: 67 [2021-02-23 18:07:03,657 WARN L202 SmtUtils]: Spent 1.01 m on a formula simplification. DAG size of input: 5216 DAG size of output: 31 [2021-02-23 18:07:09,358 WARN L202 SmtUtils]: Spent 5.69 s on a formula simplification. DAG size of input: 2115 DAG size of output: 121 [2021-02-23 18:07:10,442 WARN L202 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 1081 DAG size of output: 45 [2021-02-23 18:07:29,645 WARN L202 SmtUtils]: Spent 19.19 s on a formula simplification. DAG size of input: 3682 DAG size of output: 45 [2021-02-23 18:07:37,802 WARN L202 SmtUtils]: Spent 8.15 s on a formula simplification. DAG size of input: 1102 DAG size of output: 583 [2021-02-23 18:07:53,797 WARN L202 SmtUtils]: Spent 15.98 s on a formula simplification. DAG size of input: 4192 DAG size of output: 34 [2021-02-23 18:08:51,436 WARN L202 SmtUtils]: Spent 57.62 s on a formula simplification. DAG size of input: 5216 DAG size of output: 31 [2021-02-23 18:09:35,733 WARN L202 SmtUtils]: Spent 44.27 s on a formula simplification. DAG size of input: 5139 DAG size of output: 31 [2021-02-23 18:09:46,427 WARN L202 SmtUtils]: Spent 10.68 s on a formula simplification. DAG size of input: 2119 DAG size of output: 321 [2021-02-23 18:09:47,664 WARN L202 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 1085 DAG size of output: 65 [2021-02-23 18:09:55,078 WARN L202 SmtUtils]: Spent 7.40 s on a formula simplification. DAG size of input: 2194 DAG size of output: 189 [2021-02-23 18:09:56,910 WARN L202 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 1216 DAG size of output: 87 [2021-02-23 18:09:59,474 WARN L202 SmtUtils]: Spent 2.56 s on a formula simplification. DAG size of input: 1504 DAG size of output: 55 [2021-02-23 18:10:25,323 WARN L202 SmtUtils]: Spent 25.83 s on a formula simplification. DAG size of input: 4411 DAG size of output: 31 [2021-02-23 18:10:55,828 WARN L202 SmtUtils]: Spent 30.49 s on a formula simplification. DAG size of input: 2123 DAG size of output: 1097 [2021-02-23 18:10:57,614 WARN L202 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 1089 DAG size of output: 121 [2021-02-23 18:11:12,258 WARN L202 SmtUtils]: Spent 14.64 s on a formula simplification that was a NOOP. DAG size: 1099 [2021-02-23 18:12:09,639 WARN L202 SmtUtils]: Spent 57.36 s on a formula simplification. DAG size of input: 5218 DAG size of output: 39 [2021-02-23 18:12:14,113 WARN L202 SmtUtils]: Spent 4.47 s on a formula simplification. DAG size of input: 1108 DAG size of output: 323 [2021-02-23 18:12:18,211 WARN L202 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 2105 DAG size of output: 39 [2021-02-23 18:13:10,114 WARN L202 SmtUtils]: Spent 51.89 s on a formula simplification. DAG size of input: 5211 DAG size of output: 31 [2021-02-23 18:13:14,227 WARN L202 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 2102 DAG size of output: 31 [2021-02-23 18:13:18,435 WARN L202 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 1093 DAG size of output: 321 [2021-02-23 18:13:24,449 WARN L202 SmtUtils]: Spent 6.00 s on a formula simplification. DAG size of input: 2242 DAG size of output: 121 [2021-02-23 18:13:26,315 WARN L202 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 1312 DAG size of output: 67