/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/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:19:14,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:19:14,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:19:14,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 21:19:14,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:19:14,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:19:14,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:19:14,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:19:14,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:19:14,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:19:14,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:19:14,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:19:14,487 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:19:14,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:19:14,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:19:14,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:19:14,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:19:14,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:19:14,534 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:19:14,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:19:14,535 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 21:19:14,559 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:19:14,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:19:14,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:19:14,563 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:19:14,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:19:14,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:19:14,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:19:14,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:19:14,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:19:14,565 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:19:14,566 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:19:14,566 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:19:14,566 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:19:14,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:19:14,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:19:14,567 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:19:14,567 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:19:14,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:19:14,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:19:14,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:19:14,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:19:14,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:19:14,568 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:19:14,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:19:15,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:19:15,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:19:15,007 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:19:15,008 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:19:15,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2021-02-21 21:19:15,075 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49c8f4646/6dc3ebf85f9c4326a917799ddb9ca988/FLAGa7d62724b [2021-02-21 21:19:15,637 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:19:15,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2021-02-21 21:19:15,652 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49c8f4646/6dc3ebf85f9c4326a917799ddb9ca988/FLAGa7d62724b [2021-02-21 21:19:16,012 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49c8f4646/6dc3ebf85f9c4326a917799ddb9ca988 [2021-02-21 21:19:16,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:19:16,037 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:19:16,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:19:16,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:19:16,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:19:16,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:19:16" (1/1) ... [2021-02-21 21:19:16,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a07be2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:19:16, skipping insertion in model container [2021-02-21 21:19:16,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:19:16" (1/1) ... [2021-02-21 21:19:16,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:19:16,088 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:19:16,263 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c[1126,1139] [2021-02-21 21:19:16,274 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c[1880,1893] [2021-02-21 21:19:16,280 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c[2415,2428] [2021-02-21 21:19:16,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:19:16,293 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:19:16,313 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c[1126,1139] [2021-02-21 21:19:16,319 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c[1880,1893] [2021-02-21 21:19:16,323 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c[2415,2428] [2021-02-21 21:19:16,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:19:16,343 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:19:16,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:19:16 WrapperNode [2021-02-21 21:19:16,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:19:16,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:19:16,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:19:16,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:19:16,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:19:16" (1/1) ... [2021-02-21 21:19:16,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:19:16" (1/1) ... [2021-02-21 21:19:16,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:19:16" (1/1) ... [2021-02-21 21:19:16,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:19:16" (1/1) ... [2021-02-21 21:19:16,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:19:16" (1/1) ... [2021-02-21 21:19:16,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:19:16" (1/1) ... [2021-02-21 21:19:16,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:19:16" (1/1) ... [2021-02-21 21:19:16,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:19:16,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:19:16,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:19:16,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:19:16,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:19:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:19:16,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:19:16,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:19:16,497 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:19:16,497 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 21:19:16,497 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:19:16,498 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:19:16,498 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:19:16,498 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:19:16,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:19:16,499 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 21:19:16,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:19:16,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-21 21:19:16,500 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:19:16,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:19:16,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:19:16,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:19:16,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:19:16,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:19:16,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:19:17,214 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:19:17,215 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 21:19:17,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:19:17 BoogieIcfgContainer [2021-02-21 21:19:17,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:19:17,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:19:17,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:19:17,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:19:17,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:19:16" (1/3) ... [2021-02-21 21:19:17,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25514bb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:19:17, skipping insertion in model container [2021-02-21 21:19:17,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:19:16" (2/3) ... [2021-02-21 21:19:17,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25514bb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:19:17, skipping insertion in model container [2021-02-21 21:19:17,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:19:17" (3/3) ... [2021-02-21 21:19:17,230 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i.v+nlh-reducer.c [2021-02-21 21:19:17,238 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:19:17,244 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-02-21 21:19:17,265 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-02-21 21:19:17,300 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:19:17,300 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:19:17,300 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:19:17,300 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:19:17,301 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:19:17,301 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:19:17,301 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:19:17,301 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:19:17,324 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states. [2021-02-21 21:19:17,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-21 21:19:17,340 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:19:17,341 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] [2021-02-21 21:19:17,341 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:19:17,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:19:17,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1631991453, now seen corresponding path program 1 times [2021-02-21 21:19:17,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:19:17,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100528291] [2021-02-21 21:19:17,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:19:17,461 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:19:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:17,684 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:17,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:17,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:17,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:19:17,706 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:17,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:17,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:19:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:17,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:17,804 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:19:17,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100528291] [2021-02-21 21:19:17,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:19:17,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:19:17,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433498110] [2021-02-21 21:19:17,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:19:17,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:19:17,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:19:17,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:19:17,850 INFO L87 Difference]: Start difference. First operand 108 states. Second operand 4 states. [2021-02-21 21:19:18,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:19:18,370 INFO L93 Difference]: Finished difference Result 215 states and 241 transitions. [2021-02-21 21:19:18,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:19:18,372 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2021-02-21 21:19:18,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:19:18,383 INFO L225 Difference]: With dead ends: 215 [2021-02-21 21:19:18,383 INFO L226 Difference]: Without dead ends: 115 [2021-02-21 21:19:18,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:19:18,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-02-21 21:19:18,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2021-02-21 21:19:18,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-02-21 21:19:18,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2021-02-21 21:19:18,442 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 35 [2021-02-21 21:19:18,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:19:18,442 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2021-02-21 21:19:18,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:19:18,443 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2021-02-21 21:19:18,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-21 21:19:18,444 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:19:18,445 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] [2021-02-21 21:19:18,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:19:18,445 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:19:18,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:19:18,446 INFO L82 PathProgramCache]: Analyzing trace with hash 510759303, now seen corresponding path program 1 times [2021-02-21 21:19:18,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:19:18,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57112823] [2021-02-21 21:19:18,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:19:18,450 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:19:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:18,528 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:18,529 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:18,530 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:18,531 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:18,538 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:18,539 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:18,547 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:18,548 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:18,559 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:18,560 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:18,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:19:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:18,610 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:18,611 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:19:18,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57112823] [2021-02-21 21:19:18,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:19:18,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:19:18,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038801497] [2021-02-21 21:19:18,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:19:18,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:19:18,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:19:18,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:19:18,618 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand 6 states. [2021-02-21 21:19:18,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:19:18,849 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2021-02-21 21:19:18,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 21:19:18,849 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2021-02-21 21:19:18,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:19:18,852 INFO L225 Difference]: With dead ends: 132 [2021-02-21 21:19:18,852 INFO L226 Difference]: Without dead ends: 130 [2021-02-21 21:19:18,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-02-21 21:19:18,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-02-21 21:19:18,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 86. [2021-02-21 21:19:18,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-02-21 21:19:18,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2021-02-21 21:19:18,869 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 36 [2021-02-21 21:19:18,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:19:18,869 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2021-02-21 21:19:18,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 21:19:18,870 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2021-02-21 21:19:18,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-21 21:19:18,871 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:19:18,871 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] [2021-02-21 21:19:18,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:19:18,872 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:19:18,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:19:18,872 INFO L82 PathProgramCache]: Analyzing trace with hash 2004335176, now seen corresponding path program 1 times [2021-02-21 21:19:18,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:19:18,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131053428] [2021-02-21 21:19:18,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:19:18,875 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:19:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:18,940 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:18,951 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:18,953 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:18,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:19:18,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:18,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:19,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:19:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:19,028 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:19,029 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:19:19,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131053428] [2021-02-21 21:19:19,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:19:19,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:19:19,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107543728] [2021-02-21 21:19:19,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:19:19,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:19:19,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:19:19,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:19:19,041 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 4 states. [2021-02-21 21:19:19,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:19:19,243 INFO L93 Difference]: Finished difference Result 162 states and 170 transitions. [2021-02-21 21:19:19,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:19:19,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2021-02-21 21:19:19,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:19:19,249 INFO L225 Difference]: With dead ends: 162 [2021-02-21 21:19:19,249 INFO L226 Difference]: Without dead ends: 111 [2021-02-21 21:19:19,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:19:19,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-02-21 21:19:19,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 78. [2021-02-21 21:19:19,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-02-21 21:19:19,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-02-21 21:19:19,274 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 36 [2021-02-21 21:19:19,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:19:19,275 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-02-21 21:19:19,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:19:19,275 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-02-21 21:19:19,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-21 21:19:19,279 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:19:19,280 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] [2021-02-21 21:19:19,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:19:19,280 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:19:19,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:19:19,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1679437122, now seen corresponding path program 1 times [2021-02-21 21:19:19,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:19:19,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753861080] [2021-02-21 21:19:19,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:19:19,291 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:19:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:19,437 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:19,438 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:19,439 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:19,440 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:19,445 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:19,448 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:19,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:19:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:19,491 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:19,492 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:19,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:19:19,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753861080] [2021-02-21 21:19:19,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:19:19,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:19:19,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280124507] [2021-02-21 21:19:19,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:19:19,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:19:19,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:19:19,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:19:19,499 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 4 states. [2021-02-21 21:19:19,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:19:19,656 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2021-02-21 21:19:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:19:19,657 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2021-02-21 21:19:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:19:19,662 INFO L225 Difference]: With dead ends: 106 [2021-02-21 21:19:19,662 INFO L226 Difference]: Without dead ends: 89 [2021-02-21 21:19:19,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:19:19,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-02-21 21:19:19,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2021-02-21 21:19:19,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-02-21 21:19:19,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2021-02-21 21:19:19,692 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 38 [2021-02-21 21:19:19,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:19:19,693 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2021-02-21 21:19:19,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:19:19,693 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2021-02-21 21:19:19,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-21 21:19:19,697 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:19:19,698 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] [2021-02-21 21:19:19,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:19:19,699 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:19:19,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:19:19,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2146049076, now seen corresponding path program 1 times [2021-02-21 21:19:19,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:19:19,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011340940] [2021-02-21 21:19:19,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:19:19,709 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:19:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:19,841 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:19,842 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:19,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:19,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:19,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:19,853 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:19:19,862 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:19,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:19:19,875 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:19,876 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:19:19,890 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:19,891 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:19:19,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:19,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:19,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:19:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:19,934 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:19,934 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:19:19,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011340940] [2021-02-21 21:19:19,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:19:19,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:19:19,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222559554] [2021-02-21 21:19:19,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:19:19,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:19:19,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:19:19,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:19:19,945 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 6 states. [2021-02-21 21:19:20,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:19:20,176 INFO L93 Difference]: Finished difference Result 186 states and 194 transitions. [2021-02-21 21:19:20,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 21:19:20,177 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2021-02-21 21:19:20,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:19:20,178 INFO L225 Difference]: With dead ends: 186 [2021-02-21 21:19:20,179 INFO L226 Difference]: Without dead ends: 144 [2021-02-21 21:19:20,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-02-21 21:19:20,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-02-21 21:19:20,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 92. [2021-02-21 21:19:20,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-02-21 21:19:20,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2021-02-21 21:19:20,190 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 57 [2021-02-21 21:19:20,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:19:20,191 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2021-02-21 21:19:20,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 21:19:20,191 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2021-02-21 21:19:20,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-02-21 21:19:20,192 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:19:20,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:19:20,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 21:19:20,193 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:19:20,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:19:20,193 INFO L82 PathProgramCache]: Analyzing trace with hash 2038639544, now seen corresponding path program 1 times [2021-02-21 21:19:20,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:19:20,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703810168] [2021-02-21 21:19:20,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:19:20,196 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:19:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:20,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:20,232 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:20,233 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:20,234 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:20,237 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:20,237 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:20,242 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:20,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:19:20,247 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:20,248 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:20,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:20,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:19:20,256 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:20,256 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:19:20,275 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:20,276 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:19:20,285 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:20,285 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:20,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:19:20,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:20,335 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:20,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:20,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:19:20,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703810168] [2021-02-21 21:19:20,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:19:20,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 21:19:20,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247201210] [2021-02-21 21:19:20,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 21:19:20,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:19:20,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 21:19:20,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-21 21:19:20,343 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 9 states. [2021-02-21 21:19:20,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:19:20,719 INFO L93 Difference]: Finished difference Result 162 states and 170 transitions. [2021-02-21 21:19:20,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-21 21:19:20,720 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2021-02-21 21:19:20,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:19:20,721 INFO L225 Difference]: With dead ends: 162 [2021-02-21 21:19:20,721 INFO L226 Difference]: Without dead ends: 160 [2021-02-21 21:19:20,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-02-21 21:19:20,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-02-21 21:19:20,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 97. [2021-02-21 21:19:20,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-02-21 21:19:20,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2021-02-21 21:19:20,737 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 58 [2021-02-21 21:19:20,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:19:20,738 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2021-02-21 21:19:20,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 21:19:20,738 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2021-02-21 21:19:20,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-02-21 21:19:20,739 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:19:20,739 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] [2021-02-21 21:19:20,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 21:19:20,740 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:19:20,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:19:20,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1267812039, now seen corresponding path program 1 times [2021-02-21 21:19:20,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:19:20,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026764174] [2021-02-21 21:19:20,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:19:20,743 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:19:20,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:20,814 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:20,815 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:20,816 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:20,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:19:20,821 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:20,822 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:19:20,837 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:20,838 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:19:20,848 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:20,850 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 21:19:20,865 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:20,866 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 21:19:20,866 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:20,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:20,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:19:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:20,907 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:20,908 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:20,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:19:20,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026764174] [2021-02-21 21:19:20,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:19:20,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:19:20,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838220402] [2021-02-21 21:19:20,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:19:20,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:19:20,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:19:20,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:19:20,921 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 6 states. [2021-02-21 21:19:21,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:19:21,184 INFO L93 Difference]: Finished difference Result 174 states and 181 transitions. [2021-02-21 21:19:21,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 21:19:21,185 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2021-02-21 21:19:21,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:19:21,186 INFO L225 Difference]: With dead ends: 174 [2021-02-21 21:19:21,186 INFO L226 Difference]: Without dead ends: 127 [2021-02-21 21:19:21,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:19:21,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-02-21 21:19:21,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 97. [2021-02-21 21:19:21,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-02-21 21:19:21,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2021-02-21 21:19:21,204 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 58 [2021-02-21 21:19:21,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:19:21,204 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2021-02-21 21:19:21,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 21:19:21,205 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2021-02-21 21:19:21,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-02-21 21:19:21,206 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:19:21,206 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] [2021-02-21 21:19:21,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 21:19:21,206 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:19:21,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:19:21,207 INFO L82 PathProgramCache]: Analyzing trace with hash -742105895, now seen corresponding path program 1 times [2021-02-21 21:19:21,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:19:21,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258749679] [2021-02-21 21:19:21,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:19:21,209 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:19:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:21,456 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:21,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:21,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:21,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:19:21,468 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:21,469 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-21 21:19:21,488 WARN L141 QuantifierPusher]: treesize reduction 9, result has 85.0 percent of original size [2021-02-21 21:19:21,489 WARN L147 QuantifierPusher]: treesize reduction 9, result has 85.0 percent of original size 51 [2021-02-21 21:19:21,519 WARN L141 QuantifierPusher]: treesize reduction 102, result has 39.6 percent of original size [2021-02-21 21:19:21,521 WARN L147 QuantifierPusher]: treesize reduction 102, result has 39.6 percent of original size 67 [2021-02-21 21:19:21,565 WARN L141 QuantifierPusher]: treesize reduction 179, result has 31.7 percent of original size [2021-02-21 21:19:21,571 WARN L147 QuantifierPusher]: treesize reduction 179, result has 31.7 percent of original size 83 [2021-02-21 21:19:21,625 WARN L141 QuantifierPusher]: treesize reduction 370, result has 23.9 percent of original size [2021-02-21 21:19:21,626 WARN L147 QuantifierPusher]: treesize reduction 370, result has 23.9 percent of original size 116 [2021-02-21 21:19:21,699 WARN L141 QuantifierPusher]: treesize reduction 656, result has 49.8 percent of original size [2021-02-21 21:19:21,711 WARN L147 QuantifierPusher]: treesize reduction 656, result has 49.8 percent of original size 651 [2021-02-21 21:19:21,883 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 44 [2021-02-21 21:19:21,892 WARN L141 QuantifierPusher]: treesize reduction 63, result has 87.3 percent of original size [2021-02-21 21:19:21,911 WARN L147 QuantifierPusher]: treesize reduction 63, result has 87.3 percent of original size 434 [2021-02-21 21:19:22,143 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2021-02-21 21:19:22,151 WARN L141 QuantifierPusher]: treesize reduction 53, result has 89.1 percent of original size [2021-02-21 21:19:22,154 WARN L147 QuantifierPusher]: treesize reduction 53, result has 89.1 percent of original size 433 [2021-02-21 21:19:22,283 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-02-21 21:19:22,288 WARN L141 QuantifierPusher]: treesize reduction 43, result has 88.5 percent of original size [2021-02-21 21:19:22,290 WARN L147 QuantifierPusher]: treesize reduction 43, result has 88.5 percent of original size 331 [2021-02-21 21:19:22,385 WARN L141 QuantifierPusher]: treesize reduction 21, result has 82.8 percent of original size [2021-02-21 21:19:22,386 WARN L147 QuantifierPusher]: treesize reduction 21, result has 82.8 percent of original size 101 [2021-02-21 21:19:22,426 WARN L141 QuantifierPusher]: treesize reduction 32, result has 67.3 percent of original size [2021-02-21 21:19:22,427 WARN L147 QuantifierPusher]: treesize reduction 32, result has 67.3 percent of original size 66 [2021-02-21 21:19:22,472 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:22,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:19:22,492 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:22,492 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:19:22,514 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:22,515 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:22,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:19:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:19:22,574 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:19:22,575 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:19:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:19:22,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258749679] [2021-02-21 21:19:22,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:19:22,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-21 21:19:22,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535215040] [2021-02-21 21:19:22,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-21 21:19:22,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:19:22,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-21 21:19:22,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-02-21 21:19:22,615 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 17 states. [2021-02-21 21:19:23,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:19:23,917 INFO L93 Difference]: Finished difference Result 152 states and 158 transitions. [2021-02-21 21:19:23,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-21 21:19:23,918 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 60 [2021-02-21 21:19:23,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:19:23,919 INFO L225 Difference]: With dead ends: 152 [2021-02-21 21:19:23,919 INFO L226 Difference]: Without dead ends: 105 [2021-02-21 21:19:23,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-02-21 21:19:23,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-02-21 21:19:23,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 85. [2021-02-21 21:19:23,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-02-21 21:19:23,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-02-21 21:19:23,937 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 60 [2021-02-21 21:19:23,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:19:23,938 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-02-21 21:19:23,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-21 21:19:23,938 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-02-21 21:19:23,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-02-21 21:19:23,939 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:19:23,939 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:19:23,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 21:19:23,940 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:19:23,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:19:23,940 INFO L82 PathProgramCache]: Analyzing trace with hash -582759126, now seen corresponding path program 1 times [2021-02-21 21:19:23,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:19:23,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995094579] [2021-02-21 21:19:23,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY