/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-lit/bhmr2007.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:56:19,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:56:19,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:56:19,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 18:56:19,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 18:56:19,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 18:56:19,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 18:56:19,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 18:56:19,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 18:56:19,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 18:56:19,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 18:56:19,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 18:56:19,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:56:19,610 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:56:19,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:56:19,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:56:19,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:56:19,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:56:19,631 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:56:19,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:56:19,643 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:56:19,647 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:56:19,651 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:56:19,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:56:19,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 18:56:19,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:56:19,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:56:19,681 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:56:19,682 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 18:56:19,708 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:56:19,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:56:19,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:56:19,713 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:56:19,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:56:19,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:56:19,714 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:56:19,714 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:56:19,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:56:19,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:56:19,715 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:56:19,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:56:19,716 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:56:19,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:56:19,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:56:19,717 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:56:19,717 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:56:19,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:56:19,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:56:19,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:56:19,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:56:19,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:56:19,718 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:56:20,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:56:20,168 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:56:20,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:56:20,174 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:56:20,175 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:56:20,176 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/bhmr2007.i [2021-02-23 18:56:20,262 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4236f497b/5e71e984fe8041bb8d6102a119cdd260/FLAGa5d6b3051 [2021-02-23 18:56:20,826 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:56:20,826 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/bhmr2007.i [2021-02-23 18:56:20,834 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4236f497b/5e71e984fe8041bb8d6102a119cdd260/FLAGa5d6b3051 [2021-02-23 18:56:21,176 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4236f497b/5e71e984fe8041bb8d6102a119cdd260 [2021-02-23 18:56:21,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:56:21,193 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:56:21,199 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:56:21,199 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:56:21,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:56:21,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:56:21" (1/1) ... [2021-02-23 18:56:21,207 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2966ef49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:56:21, skipping insertion in model container [2021-02-23 18:56:21,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:56:21" (1/1) ... [2021-02-23 18:56:21,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:56:21,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:56:21,390 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-lit/bhmr2007.i[895,908] [2021-02-23 18:56:21,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:56:21,417 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:56:21,433 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-lit/bhmr2007.i[895,908] [2021-02-23 18:56:21,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:56:21,456 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:56:21,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:56:21 WrapperNode [2021-02-23 18:56:21,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:56:21,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:56:21,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:56:21,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:56:21,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:56:21" (1/1) ... [2021-02-23 18:56:21,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:56:21" (1/1) ... [2021-02-23 18:56:21,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:56:21" (1/1) ... [2021-02-23 18:56:21,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:56:21" (1/1) ... [2021-02-23 18:56:21,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:56:21" (1/1) ... [2021-02-23 18:56:21,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:56:21" (1/1) ... [2021-02-23 18:56:21,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:56:21" (1/1) ... [2021-02-23 18:56:21,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:56:21,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:56:21,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:56:21,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:56:21,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:56:21" (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 18:56:21,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:56:21,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:56:21,664 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:56:21,664 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 18:56:21,664 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 18:56:21,664 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:56:21,665 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:56:21,665 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:56:21,665 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-23 18:56:21,665 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-23 18:56:21,665 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:56:21,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:56:21,666 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 18:56:21,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 18:56:21,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 18:56:21,666 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:56:21,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:56:21,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:56:21,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:56:21,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:56:21,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:56:21,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:56:21,981 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:56:21,981 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 18:56:21,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:56:21 BoogieIcfgContainer [2021-02-23 18:56:21,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:56:21,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:56:21,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:56:21,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:56:21,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:56:21" (1/3) ... [2021-02-23 18:56:21,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@448a8851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:56:21, skipping insertion in model container [2021-02-23 18:56:21,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:56:21" (2/3) ... [2021-02-23 18:56:21,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@448a8851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:56:21, skipping insertion in model container [2021-02-23 18:56:21,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:56:21" (3/3) ... [2021-02-23 18:56:21,995 INFO L111 eAbstractionObserver]: Analyzing ICFG bhmr2007.i [2021-02-23 18:56:22,004 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:56:22,009 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:56:22,033 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:56:22,095 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:56:22,096 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:56:22,096 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:56:22,101 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:56:22,102 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:56:22,102 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:56:22,102 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:56:22,102 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:56:22,132 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2021-02-23 18:56:22,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-23 18:56:22,145 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:56:22,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:56:22,146 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:56:22,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:56:22,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1301066525, now seen corresponding path program 1 times [2021-02-23 18:56:22,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:56:22,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318614537] [2021-02-23 18:56:22,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:56:22,278 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:56:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:56:22,524 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:22,526 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:56:22,527 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:22,528 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:56:22,550 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:22,551 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:56:22,563 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:22,565 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 18:56:22,589 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:22,590 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 18:56:22,598 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-23 18:56:22,601 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-23 18:56:22,636 WARN L141 QuantifierPusher]: treesize reduction 10, result has 75.6 percent of original size [2021-02-23 18:56:22,638 WARN L147 QuantifierPusher]: treesize reduction 10, result has 75.6 percent of original size 31 [2021-02-23 18:56:22,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:22,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:56:22,684 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:22,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:56:22,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:22,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:56:22,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:56:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:56:22,762 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:22,763 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:56:22,772 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 18:56:22,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318614537] [2021-02-23 18:56:22,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:56:22,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 18:56:22,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112399679] [2021-02-23 18:56:22,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 18:56:22,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:56:22,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 18:56:22,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-02-23 18:56:22,801 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 10 states. [2021-02-23 18:56:23,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:56:23,363 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2021-02-23 18:56:23,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-23 18:56:23,365 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2021-02-23 18:56:23,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:56:23,373 INFO L225 Difference]: With dead ends: 78 [2021-02-23 18:56:23,373 INFO L226 Difference]: Without dead ends: 47 [2021-02-23 18:56:23,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-02-23 18:56:23,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-23 18:56:23,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-02-23 18:56:23,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-23 18:56:23,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-02-23 18:56:23,427 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 27 [2021-02-23 18:56:23,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:56:23,427 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-02-23 18:56:23,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 18:56:23,428 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-02-23 18:56:23,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-23 18:56:23,429 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:56:23,429 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] [2021-02-23 18:56:23,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:56:23,430 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:56:23,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:56:23,432 INFO L82 PathProgramCache]: Analyzing trace with hash 981129577, now seen corresponding path program 1 times [2021-02-23 18:56:23,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:56:23,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67799418] [2021-02-23 18:56:23,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:56:25,634 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-02-23 18:56:25,652 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-23 18:56:25,704 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-23 18:56:25,707 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-23 18:56:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:56:25,840 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:25,841 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:56:25,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:25,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:56:25,847 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:25,848 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:56:25,856 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:25,857 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 18:56:25,867 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:25,869 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 18:56:25,887 WARN L141 QuantifierPusher]: treesize reduction 61, result has 29.1 percent of original size [2021-02-23 18:56:25,888 WARN L147 QuantifierPusher]: treesize reduction 61, result has 29.1 percent of original size 25 [2021-02-23 18:56:25,910 WARN L141 QuantifierPusher]: treesize reduction 54, result has 23.9 percent of original size [2021-02-23 18:56:25,911 WARN L147 QuantifierPusher]: treesize reduction 54, result has 23.9 percent of original size 17 [2021-02-23 18:56:25,924 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:25,925 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:56:25,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:25,934 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:56:25,943 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:25,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:56:25,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:56:25,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:56:25,984 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:25,985 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:56:26,013 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 18:56:26,023 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:26,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:26,034 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:26,038 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:56:26,041 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-02-23 18:56:26,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:26,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:26,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:26,114 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:56:26,117 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 173 [2021-02-23 18:56:26,173 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:26,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:26,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:26,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:56:26,184 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-02-23 18:56:26,256 WARN L141 QuantifierPusher]: treesize reduction 8, result has 95.7 percent of original size [2021-02-23 18:56:26,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:26,260 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:26,263 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:56:26,266 WARN L147 QuantifierPusher]: treesize reduction 8, result has 95.7 percent of original size 176 [2021-02-23 18:56:26,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:26,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:26,353 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:26,356 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:56:26,359 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 177 [2021-02-23 18:56:26,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:26,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:26,435 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size [2021-02-23 18:56:26,438 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size 168 [2021-02-23 18:56:26,441 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-23 18:56:26,519 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:26,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:26,526 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:56:26,528 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 174 [2021-02-23 18:56:26,531 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-23 18:56:26,618 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:26,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:26,626 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:56:26,629 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 172 [2021-02-23 18:56:26,632 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-23 18:56:26,744 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:26,744 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:56:26,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67799418] [2021-02-23 18:56:26,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:56:26,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-23 18:56:26,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075739178] [2021-02-23 18:56:26,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-23 18:56:26,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:56:26,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-23 18:56:26,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-23 18:56:26,748 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 16 states. [2021-02-23 18:56:28,098 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 89 [2021-02-23 18:56:28,311 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 94 [2021-02-23 18:56:28,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:56:28,843 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-02-23 18:56:28,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-23 18:56:28,844 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2021-02-23 18:56:28,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:56:28,846 INFO L225 Difference]: With dead ends: 62 [2021-02-23 18:56:28,846 INFO L226 Difference]: Without dead ends: 57 [2021-02-23 18:56:28,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2021-02-23 18:56:28,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-02-23 18:56:28,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2021-02-23 18:56:28,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-02-23 18:56:28,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-02-23 18:56:28,869 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 34 [2021-02-23 18:56:28,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:56:28,870 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-02-23 18:56:28,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-23 18:56:28,870 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-02-23 18:56:28,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-23 18:56:28,871 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:56:28,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:56:28,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:56:28,872 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:56:28,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:56:28,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2144366633, now seen corresponding path program 1 times [2021-02-23 18:56:28,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:56:28,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008969150] [2021-02-23 18:56:28,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:56:31,037 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-23 18:56:31,045 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-23 18:56:33,178 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-23 18:56:33,185 WARN L141 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size [2021-02-23 18:56:33,205 WARN L147 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size 144 [2021-02-23 18:56:33,209 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 18:56:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:56:33,551 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:33,553 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:56:33,554 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:33,555 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:56:33,562 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:33,563 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:56:33,574 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:33,576 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 18:56:33,588 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:33,589 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 18:56:33,613 WARN L141 QuantifierPusher]: treesize reduction 16, result has 89.6 percent of original size [2021-02-23 18:56:33,617 WARN L147 QuantifierPusher]: treesize reduction 16, result has 89.6 percent of original size 138 [2021-02-23 18:56:33,683 WARN L141 QuantifierPusher]: treesize reduction 77, result has 38.4 percent of original size [2021-02-23 18:56:33,684 WARN L147 QuantifierPusher]: treesize reduction 77, result has 38.4 percent of original size 48 [2021-02-23 18:56:33,735 WARN L141 QuantifierPusher]: treesize reduction 54, result has 23.9 percent of original size [2021-02-23 18:56:33,736 WARN L147 QuantifierPusher]: treesize reduction 54, result has 23.9 percent of original size 17 [2021-02-23 18:56:33,748 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:33,752 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:56:33,765 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:33,766 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:56:33,775 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:33,776 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:56:33,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:56:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:56:33,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:33,816 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:56:33,822 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 18:56:33,827 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:33,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:33,839 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:33,842 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:56:33,845 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-02-23 18:56:33,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:33,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:33,858 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:33,861 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 249 [2021-02-23 18:56:33,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 250 [2021-02-23 18:56:33,962 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:33,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:33,966 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:33,974 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:56:33,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 173 [2021-02-23 18:56:34,034 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:34,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:34,038 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:34,043 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:56:34,048 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-02-23 18:56:34,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:34,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:34,120 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:34,123 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:56:34,129 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-23 18:56:34,199 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:34,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:34,204 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:34,206 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 180 [2021-02-23 18:56:34,209 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 186 [2021-02-23 18:56:34,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:34,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:34,283 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:56:34,285 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 174 [2021-02-23 18:56:34,289 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-23 18:56:34,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:34,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:34,363 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:56:34,365 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 174 [2021-02-23 18:56:34,367 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-23 18:56:34,444 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:34,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:34,449 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:56:34,451 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 172 [2021-02-23 18:56:34,454 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-23 18:56:34,559 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:34,559 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:56:34,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008969150] [2021-02-23 18:56:34,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:56:34,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-23 18:56:34,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064384125] [2021-02-23 18:56:34,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-23 18:56:34,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:56:34,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-23 18:56:34,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-02-23 18:56:34,562 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 16 states. [2021-02-23 18:56:35,701 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2021-02-23 18:56:35,857 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 90 [2021-02-23 18:56:36,101 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 95 [2021-02-23 18:56:36,371 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 97 [2021-02-23 18:56:36,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:56:36,684 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2021-02-23 18:56:36,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-23 18:56:36,684 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2021-02-23 18:56:36,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:56:36,686 INFO L225 Difference]: With dead ends: 69 [2021-02-23 18:56:36,687 INFO L226 Difference]: Without dead ends: 64 [2021-02-23 18:56:36,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2021-02-23 18:56:36,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-23 18:56:36,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2021-02-23 18:56:36,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-02-23 18:56:36,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-02-23 18:56:36,714 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 34 [2021-02-23 18:56:36,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:56:36,714 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-02-23 18:56:36,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-23 18:56:36,714 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-02-23 18:56:36,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-23 18:56:36,716 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:56:36,716 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-23 18:56:36,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 18:56:36,716 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:56:36,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:56:36,717 INFO L82 PathProgramCache]: Analyzing trace with hash 245685341, now seen corresponding path program 1 times [2021-02-23 18:56:36,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:56:36,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398550612] [2021-02-23 18:56:36,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:56:38,869 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-02-23 18:56:38,876 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size 135 [2021-02-23 18:56:38,877 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-23 18:56:41,013 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-23 18:56:41,024 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-23 18:56:43,153 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-23 18:56:43,160 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-23 18:56:45,311 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-23 18:56:45,316 WARN L141 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size [2021-02-23 18:56:45,320 WARN L147 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size 144 [2021-02-23 18:56:45,321 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 18:56:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:56:45,596 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:45,597 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:56:45,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:45,598 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:56:45,602 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:45,603 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:56:45,610 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:45,611 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 18:56:45,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:45,622 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 18:56:45,639 WARN L141 QuantifierPusher]: treesize reduction 549, result has 3.9 percent of original size [2021-02-23 18:56:45,640 WARN L147 QuantifierPusher]: treesize reduction 549, result has 3.9 percent of original size 22 [2021-02-23 18:56:45,658 WARN L141 QuantifierPusher]: treesize reduction 837, result has 18.5 percent of original size [2021-02-23 18:56:45,661 WARN L147 QuantifierPusher]: treesize reduction 837, result has 18.5 percent of original size 190 [2021-02-23 18:56:45,676 WARN L141 QuantifierPusher]: treesize reduction 491, result has 9.9 percent of original size [2021-02-23 18:56:45,677 WARN L147 QuantifierPusher]: treesize reduction 491, result has 9.9 percent of original size 54 [2021-02-23 18:56:45,713 WARN L141 QuantifierPusher]: treesize reduction 348, result has 4.4 percent of original size [2021-02-23 18:56:45,714 WARN L147 QuantifierPusher]: treesize reduction 348, result has 4.4 percent of original size 16 [2021-02-23 18:56:45,726 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:45,726 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:56:45,735 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:45,735 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:56:45,745 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:45,746 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:56:45,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:56:45,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:56:45,779 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:45,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:56:45,783 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 18:56:45,786 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:45,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:45,790 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:45,792 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:56:45,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-02-23 18:56:45,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:45,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:45,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:45,804 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 239 [2021-02-23 18:56:45,806 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 240 [2021-02-23 18:56:45,887 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:45,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:45,890 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:45,893 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:56:45,895 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 173 [2021-02-23 18:56:45,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:45,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:45,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:45,951 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:56:45,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-02-23 18:56:46,021 WARN L141 QuantifierPusher]: treesize reduction 8, result has 95.7 percent of original size [2021-02-23 18:56:46,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:46,023 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:46,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:56:46,028 WARN L147 QuantifierPusher]: treesize reduction 8, result has 95.7 percent of original size 176 [2021-02-23 18:56:46,096 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:46,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:46,099 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:46,101 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:56:46,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 177 [2021-02-23 18:56:46,158 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:46,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:46,163 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size [2021-02-23 18:56:46,166 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size 168 [2021-02-23 18:56:46,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-23 18:56:46,228 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:46,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:46,235 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:56:46,237 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 174 [2021-02-23 18:56:46,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-23 18:56:46,308 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:46,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:46,312 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:56:46,314 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 172 [2021-02-23 18:56:46,316 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-23 18:56:46,412 WARN L141 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size [2021-02-23 18:56:46,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:46,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:46,417 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-02-23 18:56:46,418 WARN L147 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size 177 [2021-02-23 18:56:46,508 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:46,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:46,528 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:46,530 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-02-23 18:56:46,534 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-23 18:56:46,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:46,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:46,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:46,659 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-02-23 18:56:46,663 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-02-23 18:56:46,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:46,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:46,787 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:46,798 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 184 [2021-02-23 18:56:46,800 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 190 [2021-02-23 18:56:46,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:46,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:46,925 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:56:46,927 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 172 [2021-02-23 18:56:46,929 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 183 [2021-02-23 18:56:47,017 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:47,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:47,022 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:56:47,023 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:56:47,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 183 [2021-02-23 18:56:47,132 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:47,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:56:47,137 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:56:47,139 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:56:47,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:56:47,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:56:47,243 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:56:47,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398550612] [2021-02-23 18:56:47,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:56:47,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-02-23 18:56:47,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651658648] [2021-02-23 18:56:47,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-23 18:56:47,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:56:47,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-23 18:56:47,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-02-23 18:56:47,246 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 22 states. [2021-02-23 18:56:48,814 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 90 [2021-02-23 18:56:50,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:56:50,014 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2021-02-23 18:56:50,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-23 18:56:50,015 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 41 [2021-02-23 18:56:50,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:56:50,017 INFO L225 Difference]: With dead ends: 78 [2021-02-23 18:56:50,017 INFO L226 Difference]: Without dead ends: 73 [2021-02-23 18:56:50,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=303, Invalid=1859, Unknown=0, NotChecked=0, Total=2162 [2021-02-23 18:56:50,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-23 18:56:50,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 59. [2021-02-23 18:56:50,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-02-23 18:56:50,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2021-02-23 18:56:50,050 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 41 [2021-02-23 18:56:50,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:56:50,051 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2021-02-23 18:56:50,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-02-23 18:56:50,051 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2021-02-23 18:56:50,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-23 18:56:50,052 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:56:50,052 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-23 18:56:50,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 18:56:50,053 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:56:50,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:56:50,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1551460643, now seen corresponding path program 2 times [2021-02-23 18:56:50,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:56:50,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23036026] [2021-02-23 18:56:50,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:56:52,192 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-02-23 18:56:52,198 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size 143 [2021-02-23 18:56:54,315 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-02-23 18:56:54,319 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size 135 [2021-02-23 18:56:54,320 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 18:56:56,468 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-02-23 18:56:56,473 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-23 18:56:56,477 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-23 18:56:58,599 WARN L141 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size [2021-02-23 18:56:58,604 WARN L147 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size 144 [2021-02-23 18:57:00,733 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-23 18:57:00,737 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-23 18:57:00,743 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 18:57:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:57:01,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,016 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:57:01,017 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,017 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:57:01,021 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,021 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:57:01,028 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,029 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 18:57:01,039 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,039 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 18:57:01,053 WARN L141 QuantifierPusher]: treesize reduction 16, result has 88.1 percent of original size [2021-02-23 18:57:01,056 WARN L147 QuantifierPusher]: treesize reduction 16, result has 88.1 percent of original size 119 [2021-02-23 18:57:01,101 WARN L141 QuantifierPusher]: treesize reduction 118, result has 15.7 percent of original size [2021-02-23 18:57:01,101 WARN L147 QuantifierPusher]: treesize reduction 118, result has 15.7 percent of original size 22 [2021-02-23 18:57:01,110 WARN L141 QuantifierPusher]: treesize reduction 44, result has 35.3 percent of original size [2021-02-23 18:57:01,111 WARN L147 QuantifierPusher]: treesize reduction 44, result has 35.3 percent of original size 24 [2021-02-23 18:57:01,129 WARN L141 QuantifierPusher]: treesize reduction 52, result has 23.5 percent of original size [2021-02-23 18:57:01,129 WARN L147 QuantifierPusher]: treesize reduction 52, result has 23.5 percent of original size 16 [2021-02-23 18:57:01,144 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,145 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:57:01,154 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,155 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:57:01,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,165 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:57:01,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:57:01,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:57:01,208 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,211 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:57:01,214 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 18:57:01,217 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:01,223 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,225 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:57:01,227 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-02-23 18:57:01,230 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:01,234 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 243 [2021-02-23 18:57:01,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 244 [2021-02-23 18:57:01,330 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:01,334 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,339 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:57:01,341 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 173 [2021-02-23 18:57:01,394 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:01,397 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,398 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:57:01,400 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-02-23 18:57:01,465 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:01,468 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,470 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:57:01,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-23 18:57:01,544 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:01,547 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,549 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 180 [2021-02-23 18:57:01,551 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 186 [2021-02-23 18:57:01,610 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:01,613 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size [2021-02-23 18:57:01,614 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size 168 [2021-02-23 18:57:01,617 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-23 18:57:01,693 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:01,696 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:57:01,698 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 174 [2021-02-23 18:57:01,699 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-23 18:57:01,764 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:01,768 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:57:01,769 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:57:01,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-23 18:57:01,846 WARN L141 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size [2021-02-23 18:57:01,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:01,849 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,852 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:57:01,854 WARN L147 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size 181 [2021-02-23 18:57:01,935 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:01,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:01,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:57:01,940 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-02-23 18:57:02,038 WARN L141 QuantifierPusher]: treesize reduction 8, result has 95.8 percent of original size [2021-02-23 18:57:02,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:02,044 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:02,046 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:57:02,048 WARN L147 QuantifierPusher]: treesize reduction 8, result has 95.8 percent of original size 184 [2021-02-23 18:57:02,143 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:02,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:02,146 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:02,149 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:57:02,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-23 18:57:02,233 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:02,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:02,237 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:57:02,238 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:57:02,241 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:57:02,341 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:02,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:02,347 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:57:02,349 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:57:02,351 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:57:02,452 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:02,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:02,457 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:57:02,460 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:57:02,462 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:57:02,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:02,612 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:57:02,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23036026] [2021-02-23 18:57:02,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:57:02,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-02-23 18:57:02,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291575593] [2021-02-23 18:57:02,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-23 18:57:02,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:57:02,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-23 18:57:02,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-02-23 18:57:02,615 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 22 states. [2021-02-23 18:57:04,751 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 98 [2021-02-23 18:57:04,935 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 94 [2021-02-23 18:57:05,193 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 99 [2021-02-23 18:57:05,435 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 95 [2021-02-23 18:57:05,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:57:05,617 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2021-02-23 18:57:05,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-23 18:57:05,617 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 41 [2021-02-23 18:57:05,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:57:05,619 INFO L225 Difference]: With dead ends: 88 [2021-02-23 18:57:05,619 INFO L226 Difference]: Without dead ends: 83 [2021-02-23 18:57:05,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=307, Invalid=1855, Unknown=0, NotChecked=0, Total=2162 [2021-02-23 18:57:05,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-02-23 18:57:05,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2021-02-23 18:57:05,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-02-23 18:57:05,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2021-02-23 18:57:05,684 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 41 [2021-02-23 18:57:05,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:57:05,684 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2021-02-23 18:57:05,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-02-23 18:57:05,684 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2021-02-23 18:57:05,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-23 18:57:05,686 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:57:05,686 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-02-23 18:57:05,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 18:57:05,686 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:57:05,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:57:05,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1763850199, now seen corresponding path program 3 times [2021-02-23 18:57:05,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:57:05,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740078979] [2021-02-23 18:57:05,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:57:07,839 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-23 18:57:07,843 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-02-23 18:57:07,847 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size 143 [2021-02-23 18:57:09,972 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-23 18:57:09,976 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-02-23 18:57:09,979 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size 135 [2021-02-23 18:57:12,105 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-02-23 18:57:12,108 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-02-23 18:57:12,112 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size 135 [2021-02-23 18:57:12,113 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 18:57:14,242 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-02-23 18:57:14,245 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-23 18:57:14,251 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-23 18:57:16,384 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-23 18:57:16,387 WARN L141 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size [2021-02-23 18:57:16,394 WARN L147 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size 144 [2021-02-23 18:57:18,529 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-23 18:57:18,531 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-23 18:57:18,536 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-23 18:57:18,537 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 18:57:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:57:18,648 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:18,648 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:57:18,649 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:18,649 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:57:18,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:18,653 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:57:18,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:18,661 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 18:57:18,672 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:18,673 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 18:57:18,687 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:18,688 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-02-23 18:57:18,716 WARN L141 QuantifierPusher]: treesize reduction 325, result has 11.2 percent of original size [2021-02-23 18:57:18,717 WARN L147 QuantifierPusher]: treesize reduction 325, result has 11.2 percent of original size 41 [2021-02-23 18:57:18,719 WARN L141 QuantifierPusher]: treesize reduction 145, result has 14.2 percent of original size [2021-02-23 18:57:18,720 WARN L147 QuantifierPusher]: treesize reduction 145, result has 14.2 percent of original size 24 [2021-02-23 18:57:18,738 WARN L141 QuantifierPusher]: treesize reduction 153, result has 9.5 percent of original size [2021-02-23 18:57:18,738 WARN L147 QuantifierPusher]: treesize reduction 153, result has 9.5 percent of original size 16 [2021-02-23 18:57:18,760 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:18,761 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:57:18,769 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:18,770 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:57:18,779 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:18,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:57:18,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:57:18,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:57:18,816 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:18,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:57:18,820 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 18:57:18,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:18,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:18,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:18,828 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:57:18,830 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-02-23 18:57:18,833 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:18,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:18,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:18,838 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 247 [2021-02-23 18:57:18,840 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 248 [2021-02-23 18:57:18,931 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:18,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:18,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:18,935 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:57:18,937 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 173 [2021-02-23 18:57:18,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:18,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:18,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:18,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:57:19,000 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-02-23 18:57:19,063 WARN L141 QuantifierPusher]: treesize reduction 8, result has 95.7 percent of original size [2021-02-23 18:57:19,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:19,067 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:19,069 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:57:19,071 WARN L147 QuantifierPusher]: treesize reduction 8, result has 95.7 percent of original size 176 [2021-02-23 18:57:19,135 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:19,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:19,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:19,142 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:57:19,143 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 177 [2021-02-23 18:57:19,196 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:19,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:19,202 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size [2021-02-23 18:57:19,205 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size 168 [2021-02-23 18:57:19,207 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-23 18:57:19,274 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:19,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:19,277 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:57:19,280 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 174 [2021-02-23 18:57:19,282 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-23 18:57:19,350 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:19,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:19,355 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:57:19,356 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 172 [2021-02-23 18:57:19,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-23 18:57:19,446 WARN L141 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size [2021-02-23 18:57:19,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:19,448 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:19,450 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-02-23 18:57:19,452 WARN L147 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size 177 [2021-02-23 18:57:19,547 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:19,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:19,550 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:19,552 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-02-23 18:57:19,557 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-23 18:57:19,676 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:19,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:19,678 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:19,679 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-02-23 18:57:19,681 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-02-23 18:57:19,805 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:19,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:19,808 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:19,809 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 184 [2021-02-23 18:57:19,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 190 [2021-02-23 18:57:19,935 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:19,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:19,937 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:57:19,939 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 172 [2021-02-23 18:57:19,940 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 183 [2021-02-23 18:57:20,049 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:20,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:20,052 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:57:20,054 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:57:20,055 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 183 [2021-02-23 18:57:20,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:20,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:20,169 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:57:20,170 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:57:20,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:57:20,276 WARN L141 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size [2021-02-23 18:57:20,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:20,279 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:20,280 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:57:20,282 WARN L147 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size 181 [2021-02-23 18:57:20,393 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:20,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:20,397 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:20,398 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:57:20,400 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-02-23 18:57:20,522 WARN L141 QuantifierPusher]: treesize reduction 8, result has 95.8 percent of original size [2021-02-23 18:57:20,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:20,526 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:20,528 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:57:20,529 WARN L147 QuantifierPusher]: treesize reduction 8, result has 95.8 percent of original size 184 [2021-02-23 18:57:20,659 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:20,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:20,662 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:20,663 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:57:20,664 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-23 18:57:20,788 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:20,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:20,792 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:57:20,793 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:57:20,796 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:57:20,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:20,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:20,935 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:57:20,936 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:57:20,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:57:21,086 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:21,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:21,091 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:57:21,093 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:57:21,094 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:57:21,267 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:21,268 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:57:21,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740078979] [2021-02-23 18:57:21,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:57:21,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-02-23 18:57:21,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993532305] [2021-02-23 18:57:21,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-23 18:57:21,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:57:21,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-23 18:57:21,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-02-23 18:57:21,271 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand 28 states. [2021-02-23 18:57:22,990 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 90 [2021-02-23 18:57:25,039 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 96 [2021-02-23 18:57:25,296 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 101 [2021-02-23 18:57:25,558 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 97 [2021-02-23 18:57:25,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:57:25,766 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2021-02-23 18:57:25,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-23 18:57:25,767 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 48 [2021-02-23 18:57:25,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:57:25,768 INFO L225 Difference]: With dead ends: 97 [2021-02-23 18:57:25,768 INFO L226 Difference]: Without dead ends: 92 [2021-02-23 18:57:25,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=427, Invalid=3355, Unknown=0, NotChecked=0, Total=3782 [2021-02-23 18:57:25,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-02-23 18:57:25,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2021-02-23 18:57:25,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-02-23 18:57:25,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-02-23 18:57:25,816 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 48 [2021-02-23 18:57:25,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:57:25,817 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-02-23 18:57:25,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-02-23 18:57:25,817 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-02-23 18:57:25,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-23 18:57:25,818 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:57:25,818 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-02-23 18:57:25,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 18:57:25,819 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:57:25,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:57:25,819 INFO L82 PathProgramCache]: Analyzing trace with hash -600613143, now seen corresponding path program 4 times [2021-02-23 18:57:25,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:57:25,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548521148] [2021-02-23 18:57:25,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:57:27,968 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-23 18:57:27,971 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-02-23 18:57:27,976 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size 135 [2021-02-23 18:57:30,111 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-23 18:57:30,114 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-02-23 18:57:30,119 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size 143 [2021-02-23 18:57:32,265 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-02-23 18:57:32,275 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-02-23 18:57:32,279 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size 135 [2021-02-23 18:57:32,280 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 18:57:34,429 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-02-23 18:57:34,432 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-23 18:57:34,435 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-23 18:57:36,580 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-23 18:57:36,584 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-23 18:57:36,588 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-23 18:57:38,731 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-23 18:57:38,733 WARN L141 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size [2021-02-23 18:57:38,738 WARN L147 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size 144 [2021-02-23 18:57:38,739 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 18:57:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:57:38,812 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:38,813 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:57:38,814 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:38,814 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:57:38,818 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:38,819 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:57:38,827 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:38,828 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 18:57:38,839 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:38,839 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 18:57:38,854 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:38,855 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 18:57:38,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:38,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 18:57:38,872 WARN L141 QuantifierPusher]: treesize reduction 43, result has 41.1 percent of original size [2021-02-23 18:57:38,873 WARN L147 QuantifierPusher]: treesize reduction 43, result has 41.1 percent of original size 30 [2021-02-23 18:57:38,907 WARN L141 QuantifierPusher]: treesize reduction 52, result has 23.5 percent of original size [2021-02-23 18:57:38,907 WARN L147 QuantifierPusher]: treesize reduction 52, result has 23.5 percent of original size 16 [2021-02-23 18:57:38,922 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:38,922 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:57:38,932 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:38,933 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:57:38,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:38,945 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:57:38,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:57:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:57:38,981 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:38,982 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:57:38,985 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 18:57:38,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:38,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:38,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:38,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:57:38,995 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-02-23 18:57:38,998 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:39,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:39,002 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:39,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 235 [2021-02-23 18:57:39,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 236 [2021-02-23 18:57:39,097 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:39,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:39,099 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:39,100 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:57:39,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 173 [2021-02-23 18:57:39,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:39,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:39,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:39,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:57:39,165 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-02-23 18:57:39,227 WARN L141 QuantifierPusher]: treesize reduction 8, result has 95.7 percent of original size [2021-02-23 18:57:39,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:39,230 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:39,240 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:57:39,242 WARN L147 QuantifierPusher]: treesize reduction 8, result has 95.7 percent of original size 176 [2021-02-23 18:57:39,311 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:39,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:39,314 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:39,315 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:57:39,316 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 177 [2021-02-23 18:57:39,374 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:39,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:39,383 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size [2021-02-23 18:57:39,385 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size 168 [2021-02-23 18:57:39,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-23 18:57:39,450 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:39,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:39,454 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:57:39,456 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 174 [2021-02-23 18:57:39,458 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-23 18:57:39,542 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:39,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:39,545 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:57:39,546 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 172 [2021-02-23 18:57:39,548 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-23 18:57:39,642 WARN L141 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size [2021-02-23 18:57:39,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:39,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:39,645 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-02-23 18:57:39,647 WARN L147 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size 177 [2021-02-23 18:57:39,748 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:39,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:39,750 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:39,752 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-02-23 18:57:39,753 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-23 18:57:39,873 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:39,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:39,875 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:39,877 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-02-23 18:57:39,879 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-02-23 18:57:40,009 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:40,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:40,012 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:40,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 184 [2021-02-23 18:57:40,016 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 190 [2021-02-23 18:57:40,146 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:40,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:40,149 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:57:40,152 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 172 [2021-02-23 18:57:40,154 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 183 [2021-02-23 18:57:40,250 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:40,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:40,252 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:57:40,254 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:57:40,255 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 183 [2021-02-23 18:57:40,365 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:40,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:40,368 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:57:40,369 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:57:40,371 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:57:40,476 WARN L141 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size [2021-02-23 18:57:40,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:40,479 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:40,480 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:57:40,482 WARN L147 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size 181 [2021-02-23 18:57:40,599 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:40,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:40,602 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:40,604 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:57:40,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-02-23 18:57:40,741 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:40,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:40,742 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:40,744 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:57:40,746 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 193 [2021-02-23 18:57:40,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:40,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:40,905 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:40,907 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 188 [2021-02-23 18:57:40,908 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 194 [2021-02-23 18:57:41,027 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:41,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:41,032 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:57:41,033 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:57:41,037 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:57:41,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:41,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:41,168 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:57:41,170 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:57:41,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:57:41,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:41,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:41,310 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:57:41,311 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:57:41,313 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:57:41,459 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:41,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:57:41,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548521148] [2021-02-23 18:57:41,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:57:41,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-02-23 18:57:41,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571927364] [2021-02-23 18:57:41,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-23 18:57:41,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:57:41,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-23 18:57:41,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-02-23 18:57:41,462 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 28 states. [2021-02-23 18:57:42,299 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 90 [2021-02-23 18:57:43,518 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 90 [2021-02-23 18:57:45,585 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2021-02-23 18:57:46,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:57:46,084 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2021-02-23 18:57:46,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-23 18:57:46,085 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 48 [2021-02-23 18:57:46,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:57:46,086 INFO L225 Difference]: With dead ends: 97 [2021-02-23 18:57:46,086 INFO L226 Difference]: Without dead ends: 92 [2021-02-23 18:57:46,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=377, Invalid=3045, Unknown=0, NotChecked=0, Total=3422 [2021-02-23 18:57:46,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-02-23 18:57:46,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-02-23 18:57:46,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-02-23 18:57:46,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2021-02-23 18:57:46,162 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 48 [2021-02-23 18:57:46,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:57:46,162 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2021-02-23 18:57:46,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-02-23 18:57:46,162 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2021-02-23 18:57:46,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-23 18:57:46,163 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:57:46,164 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-02-23 18:57:46,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 18:57:46,164 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:57:46,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:57:46,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1016933271, now seen corresponding path program 5 times [2021-02-23 18:57:46,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:57:46,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841606730] [2021-02-23 18:57:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:57:48,317 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-23 18:57:48,323 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-02-23 18:57:48,327 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size 135 [2021-02-23 18:57:50,486 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-23 18:57:50,490 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-02-23 18:57:50,493 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size 143 [2021-02-23 18:57:52,643 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-02-23 18:57:52,646 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-02-23 18:57:52,651 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size 135 [2021-02-23 18:57:52,652 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 18:57:54,808 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-02-23 18:57:54,811 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-23 18:57:54,822 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-23 18:57:56,989 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-23 18:57:56,992 WARN L141 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size [2021-02-23 18:57:56,997 WARN L147 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size 144 [2021-02-23 18:57:59,147 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-23 18:57:59,150 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-23 18:57:59,155 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-23 18:57:59,156 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 18:57:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:57:59,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:59,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:57:59,277 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:59,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:57:59,281 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:59,282 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:57:59,291 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:59,291 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 18:57:59,303 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:59,304 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 18:57:59,322 WARN L141 QuantifierPusher]: treesize reduction 140, result has 13.6 percent of original size [2021-02-23 18:57:59,323 WARN L147 QuantifierPusher]: treesize reduction 140, result has 13.6 percent of original size 22 [2021-02-23 18:57:59,344 WARN L141 QuantifierPusher]: treesize reduction 155, result has 12.4 percent of original size [2021-02-23 18:57:59,345 WARN L147 QuantifierPusher]: treesize reduction 155, result has 12.4 percent of original size 22 [2021-02-23 18:57:59,347 WARN L141 QuantifierPusher]: treesize reduction 44, result has 35.3 percent of original size [2021-02-23 18:57:59,348 WARN L147 QuantifierPusher]: treesize reduction 44, result has 35.3 percent of original size 24 [2021-02-23 18:57:59,375 WARN L141 QuantifierPusher]: treesize reduction 52, result has 23.5 percent of original size [2021-02-23 18:57:59,376 WARN L147 QuantifierPusher]: treesize reduction 52, result has 23.5 percent of original size 16 [2021-02-23 18:57:59,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:59,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:57:59,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:59,410 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:57:59,425 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:59,426 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:57:59,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:57:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:57:59,475 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:59,476 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:57:59,481 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 18:57:59,485 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:59,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:59,489 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:59,490 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:57:59,492 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-02-23 18:57:59,495 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:59,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:59,499 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:59,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 247 [2021-02-23 18:57:59,504 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 248 [2021-02-23 18:57:59,619 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:59,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:59,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:59,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:57:59,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 173 [2021-02-23 18:57:59,690 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:59,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:59,693 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:59,695 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:57:59,697 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-02-23 18:57:59,776 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:59,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:59,779 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:59,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:57:59,782 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-23 18:57:59,867 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:59,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:59,871 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:59,873 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 180 [2021-02-23 18:57:59,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 186 [2021-02-23 18:57:59,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:57:59,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:57:59,950 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size [2021-02-23 18:57:59,952 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size 168 [2021-02-23 18:57:59,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-23 18:58:00,022 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:00,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:00,024 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:58:00,026 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 174 [2021-02-23 18:58:00,028 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-23 18:58:00,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:00,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:00,114 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:58:00,115 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:58:00,117 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-23 18:58:00,198 WARN L141 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size [2021-02-23 18:58:00,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:00,201 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:00,202 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:58:00,205 WARN L147 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size 181 [2021-02-23 18:58:00,317 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:00,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:00,319 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:00,321 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:58:00,323 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-02-23 18:58:00,430 WARN L141 QuantifierPusher]: treesize reduction 8, result has 95.8 percent of original size [2021-02-23 18:58:00,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:00,434 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:00,435 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:58:00,437 WARN L147 QuantifierPusher]: treesize reduction 8, result has 95.8 percent of original size 184 [2021-02-23 18:58:00,541 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:00,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:00,543 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:00,545 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:58:00,547 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-23 18:58:00,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:00,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:00,645 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:58:00,646 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:58:00,648 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:58:00,747 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:00,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:00,750 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:58:00,752 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:58:00,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:58:00,871 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:00,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:00,875 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:58:00,877 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:58:00,879 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:58:01,006 WARN L141 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size [2021-02-23 18:58:01,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:01,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:01,009 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:58:01,010 WARN L147 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size 181 [2021-02-23 18:58:01,149 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:01,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:01,152 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:01,154 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:58:01,155 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-02-23 18:58:01,319 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:01,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:01,321 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:01,323 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:58:01,325 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 193 [2021-02-23 18:58:01,492 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:01,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:01,495 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:01,497 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 188 [2021-02-23 18:58:01,499 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 194 [2021-02-23 18:58:01,677 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:01,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:01,680 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:58:01,687 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:58:01,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:58:01,820 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:01,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:01,823 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:58:01,824 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:58:01,826 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:58:01,967 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:01,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:01,973 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:58:01,974 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:58:01,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:58:02,125 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:02,126 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:58:02,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841606730] [2021-02-23 18:58:02,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:58:02,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-02-23 18:58:02,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511457411] [2021-02-23 18:58:02,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-23 18:58:02,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:58:02,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-23 18:58:02,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-02-23 18:58:02,129 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand 28 states. [2021-02-23 18:58:03,081 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 42 [2021-02-23 18:58:05,374 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 95 [2021-02-23 18:58:06,222 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2021-02-23 18:58:06,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:58:06,668 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2021-02-23 18:58:06,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-23 18:58:06,669 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 48 [2021-02-23 18:58:06,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:58:06,670 INFO L225 Difference]: With dead ends: 111 [2021-02-23 18:58:06,670 INFO L226 Difference]: Without dead ends: 106 [2021-02-23 18:58:06,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=380, Invalid=2812, Unknown=0, NotChecked=0, Total=3192 [2021-02-23 18:58:06,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-02-23 18:58:06,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2021-02-23 18:58:06,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-02-23 18:58:06,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2021-02-23 18:58:06,770 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 48 [2021-02-23 18:58:06,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:58:06,771 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2021-02-23 18:58:06,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-02-23 18:58:06,771 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2021-02-23 18:58:06,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-23 18:58:06,772 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:58:06,772 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-02-23 18:58:06,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 18:58:06,773 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:58:06,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:58:06,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1480888041, now seen corresponding path program 6 times [2021-02-23 18:58:06,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:58:06,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584477689] [2021-02-23 18:58:06,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:58:08,968 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2021-02-23 18:58:08,972 WARN L141 QuantifierPusher]: treesize reduction 10, result has 93.0 percent of original size [2021-02-23 18:58:08,976 WARN L147 QuantifierPusher]: treesize reduction 10, result has 93.0 percent of original size 132 [2021-02-23 18:58:11,170 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2021-02-23 18:58:11,174 WARN L141 QuantifierPusher]: treesize reduction 8, result has 94.6 percent of original size [2021-02-23 18:58:11,177 WARN L147 QuantifierPusher]: treesize reduction 8, result has 94.6 percent of original size 140 [2021-02-23 18:58:11,178 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 18:58:13,326 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-23 18:58:13,329 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size [2021-02-23 18:58:13,333 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.8 percent of original size 135 [2021-02-23 18:58:15,494 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-23 18:58:15,497 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-02-23 18:58:15,501 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size 143 [2021-02-23 18:58:15,502 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 18:58:17,664 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-02-23 18:58:17,667 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-23 18:58:17,671 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-23 18:58:19,837 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-23 18:58:19,840 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size [2021-02-23 18:58:19,848 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.8 percent of original size 136 [2021-02-23 18:58:22,012 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-02-23 18:58:22,015 WARN L141 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size [2021-02-23 18:58:22,019 WARN L147 QuantifierPusher]: treesize reduction 6, result has 96.0 percent of original size 144 [2021-02-23 18:58:22,020 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 18:58:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:58:22,176 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:22,177 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:58:22,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:22,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:58:22,182 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:22,183 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:58:22,193 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:22,194 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 18:58:22,207 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:22,208 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 18:58:22,232 WARN L141 QuantifierPusher]: treesize reduction 1181, result has 21.4 percent of original size [2021-02-23 18:58:22,236 WARN L147 QuantifierPusher]: treesize reduction 1181, result has 21.4 percent of original size 322 [2021-02-23 18:58:22,395 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 18 [2021-02-23 18:58:22,399 WARN L141 QuantifierPusher]: treesize reduction 225, result has 40.8 percent of original size [2021-02-23 18:58:22,401 WARN L147 QuantifierPusher]: treesize reduction 225, result has 40.8 percent of original size 155 [2021-02-23 18:58:22,511 WARN L141 QuantifierPusher]: treesize reduction 353, result has 11.5 percent of original size [2021-02-23 18:58:22,512 WARN L147 QuantifierPusher]: treesize reduction 353, result has 11.5 percent of original size 46 [2021-02-23 18:58:22,559 WARN L141 QuantifierPusher]: treesize reduction 287, result has 5.3 percent of original size [2021-02-23 18:58:22,560 WARN L147 QuantifierPusher]: treesize reduction 287, result has 5.3 percent of original size 16 [2021-02-23 18:58:22,579 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:22,579 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:58:22,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:22,593 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:58:22,607 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:22,608 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:58:22,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:58:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:58:22,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:22,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:58:22,657 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 18:58:22,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:22,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:22,664 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:22,666 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:58:22,668 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-02-23 18:58:22,671 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:22,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:22,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:22,676 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 239 [2021-02-23 18:58:22,679 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 240 [2021-02-23 18:58:22,789 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:22,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:22,791 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:22,793 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:58:22,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 173 [2021-02-23 18:58:22,854 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:22,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:22,856 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:22,858 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:58:22,860 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-02-23 18:58:22,934 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:22,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:22,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:22,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 18:58:22,940 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-23 18:58:23,034 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:23,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:23,038 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:23,040 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 180 [2021-02-23 18:58:23,042 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 186 [2021-02-23 18:58:23,121 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:23,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:23,124 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size [2021-02-23 18:58:23,126 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.8 percent of original size 168 [2021-02-23 18:58:23,128 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-23 18:58:23,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:23,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:23,210 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:58:23,211 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 174 [2021-02-23 18:58:23,215 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-02-23 18:58:23,302 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:23,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:23,306 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:58:23,308 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:58:23,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-23 18:58:23,400 WARN L141 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size [2021-02-23 18:58:23,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:23,403 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:23,405 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:58:23,406 WARN L147 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size 181 [2021-02-23 18:58:23,504 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:23,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:23,506 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:23,508 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:58:23,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-02-23 18:58:23,623 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:23,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:23,626 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:23,627 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:58:23,629 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 193 [2021-02-23 18:58:23,757 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:23,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:23,760 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:23,761 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 188 [2021-02-23 18:58:23,763 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 194 [2021-02-23 18:58:23,892 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:23,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:23,897 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:58:23,899 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:58:23,900 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:58:24,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:24,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:24,017 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:58:24,019 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:58:24,021 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:58:24,148 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:24,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:24,151 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:58:24,153 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:58:24,159 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:58:24,300 WARN L141 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size [2021-02-23 18:58:24,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:24,303 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:24,305 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:58:24,309 WARN L147 QuantifierPusher]: treesize reduction 5, result has 97.3 percent of original size 181 [2021-02-23 18:58:24,443 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:24,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:24,446 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:24,449 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:58:24,450 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 189 [2021-02-23 18:58:24,597 WARN L141 QuantifierPusher]: treesize reduction 8, result has 95.8 percent of original size [2021-02-23 18:58:24,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:24,600 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:24,601 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:58:24,603 WARN L147 QuantifierPusher]: treesize reduction 8, result has 95.8 percent of original size 184 [2021-02-23 18:58:24,757 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:24,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:24,760 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:24,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-02-23 18:58:24,767 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 185 [2021-02-23 18:58:24,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:24,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:24,905 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:58:24,906 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:58:24,907 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:58:25,047 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:25,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:25,050 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:58:25,051 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:58:25,053 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:58:25,214 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:25,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:58:25,217 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size [2021-02-23 18:58:25,219 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.9 percent of original size 176 [2021-02-23 18:58:25,220 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-02-23 18:58:25,398 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:25,399 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:58:25,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584477689] [2021-02-23 18:58:25,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:58:25,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-02-23 18:58:25,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383120524] [2021-02-23 18:58:25,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-23 18:58:25,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:58:25,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-23 18:58:25,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2021-02-23 18:58:25,401 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand 28 states. [2021-02-23 18:58:26,241 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 90 [2021-02-23 18:58:26,454 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 92 [2021-02-23 18:58:29,391 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2021-02-23 18:58:29,655 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 96 [2021-02-23 18:58:30,012 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 101 [2021-02-23 18:58:30,388 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 97 [2021-02-23 18:58:30,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:58:30,680 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2021-02-23 18:58:30,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-23 18:58:30,681 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 48 [2021-02-23 18:58:30,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:58:30,682 INFO L225 Difference]: With dead ends: 118 [2021-02-23 18:58:30,682 INFO L226 Difference]: Without dead ends: 113 [2021-02-23 18:58:30,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=417, Invalid=3123, Unknown=0, NotChecked=0, Total=3540 [2021-02-23 18:58:30,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-02-23 18:58:30,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 94. [2021-02-23 18:58:30,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-02-23 18:58:30,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2021-02-23 18:58:30,797 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 48 [2021-02-23 18:58:30,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:58:30,797 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2021-02-23 18:58:30,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-02-23 18:58:30,797 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2021-02-23 18:58:30,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-02-23 18:58:30,798 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:58:30,798 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-02-23 18:58:30,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 18:58:30,799 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:58:30,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:58:30,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1600399971, now seen corresponding path program 7 times [2021-02-23 18:58:30,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:58:30,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460904423] [2021-02-23 18:58:30,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:58:30,831 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:30,833 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-23 18:58:30,896 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:30,897 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 18:58:30,953 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:30,954 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 18:58:30,999 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:58:31,000 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-23 18:58:33,280 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 95 [2021-02-23 18:58:33,283 WARN L141 QuantifierPusher]: treesize reduction 30, result has 85.4 percent of original size [2021-02-23 18:58:33,292 WARN L147 QuantifierPusher]: treesize reduction 30, result has 85.4 percent of original size 176 [2021-02-23 18:58:35,503 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 95 [2021-02-23 18:58:35,506 WARN L141 QuantifierPusher]: treesize reduction 32, result has 84.0 percent of original size [2021-02-23 18:58:35,512 WARN L147 QuantifierPusher]: treesize reduction 32, result has 84.0 percent of original size 168 [2021-02-23 18:58:35,513 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 18:58:35,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 18:58:35,515 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_main_#t~nondet4_171| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateFactory.newSPredicate(PredicateFactory.java:60) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.generateMetaTrace(AcceleratedInterpolationCore.java:359) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:225) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:145) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:62) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:131) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-02-23 18:58:35,518 INFO L168 Benchmark]: Toolchain (without parser) took 134336.93 ms. Allocated memory was 174.1 MB in the beginning and 251.7 MB in the end (delta: 77.6 MB). Free memory was 156.3 MB in the beginning and 167.8 MB in the end (delta: -11.5 MB). Peak memory consumption was 152.2 MB. Max. memory is 8.0 GB. [2021-02-23 18:58:35,518 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 174.1 MB. Free memory is still 147.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 18:58:35,518 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.07 ms. Allocated memory is still 174.1 MB. Free memory was 155.0 MB in the beginning and 145.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 18:58:35,518 INFO L168 Benchmark]: Boogie Preprocessor took 40.72 ms. Allocated memory is still 174.1 MB. Free memory was 145.3 MB in the beginning and 143.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 18:58:35,519 INFO L168 Benchmark]: RCFGBuilder took 484.52 ms. Allocated memory is still 174.1 MB. Free memory was 143.9 MB in the beginning and 142.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 18:58:35,519 INFO L168 Benchmark]: TraceAbstraction took 133531.41 ms. Allocated memory was 174.1 MB in the beginning and 251.7 MB in the end (delta: 77.6 MB). Free memory was 142.4 MB in the beginning and 167.8 MB in the end (delta: -25.4 MB). Peak memory consumption was 139.9 MB. Max. memory is 8.0 GB. [2021-02-23 18:58:35,520 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 174.1 MB. Free memory is still 147.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 258.07 ms. Allocated memory is still 174.1 MB. Free memory was 155.0 MB in the beginning and 145.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.72 ms. Allocated memory is still 174.1 MB. Free memory was 145.3 MB in the beginning and 143.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 484.52 ms. Allocated memory is still 174.1 MB. Free memory was 143.9 MB in the beginning and 142.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 133531.41 ms. Allocated memory was 174.1 MB in the beginning and 251.7 MB in the end (delta: 77.6 MB). Free memory was 142.4 MB in the beginning and 167.8 MB in the end (delta: -25.4 MB). Peak memory consumption was 139.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_main_#t~nondet4_171| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_main_#t~nondet4_171|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...